./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:37:07,631 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:37:07,694 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 04:37:07,698 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:37:07,699 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:37:07,720 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:37:07,721 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:37:07,721 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:37:07,722 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:37:07,722 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:37:07,723 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:37:07,723 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:37:07,724 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:37:07,725 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:37:07,725 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:37:07,726 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:37:07,727 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:37:07,727 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:37:07,727 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:37:07,728 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:37:07,728 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 04:37:07,729 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 04:37:07,729 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 04:37:07,730 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:37:07,730 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 04:37:07,730 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 04:37:07,731 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:37:07,731 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:37:07,731 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:37:07,732 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:37:07,732 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:37:07,733 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:37:07,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:37:07,733 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:37:07,733 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:37:07,733 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:37:07,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:37:07,734 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:37:07,734 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:37:07,734 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:37:07,734 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:37:07,735 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_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2023-11-29 04:37:07,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:37:07,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:37:07,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:37:07,975 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:37:07,976 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:37:07,977 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2023-11-29 04:37:10,791 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:37:10,964 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:37:10,964 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2023-11-29 04:37:10,972 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/data/46523500d/4c8ea1f51f134109a33808fc11d3bfeb/FLAGb865d7fcd [2023-11-29 04:37:10,985 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/data/46523500d/4c8ea1f51f134109a33808fc11d3bfeb [2023-11-29 04:37:10,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:37:10,992 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:37:10,993 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:37:10,993 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:37:10,998 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:37:10,999 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:37:10" (1/1) ... [2023-11-29 04:37:11,000 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@596bb318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:10, skipping insertion in model container [2023-11-29 04:37:11,000 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:37:10" (1/1) ... [2023-11-29 04:37:11,023 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:37:11,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:37:11,205 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) [2023-11-29 04:37:11,206 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@51ac4854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:11, skipping insertion in model container [2023-11-29 04:37:11,206 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:37:11,206 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 04:37:11,208 INFO L158 Benchmark]: Toolchain (without parser) took 215.52ms. Allocated memory is still 195.0MB. Free memory was 153.2MB in the beginning and 143.3MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 04:37:11,208 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 195.0MB. Free memory was 161.1MB in the beginning and 161.0MB in the end (delta: 16.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 04:37:11,209 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.13ms. Allocated memory is still 195.0MB. Free memory was 152.9MB in the beginning and 143.3MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 04:37:11,210 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 195.0MB. Free memory was 161.1MB in the beginning and 161.0MB in the end (delta: 16.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 213.13ms. Allocated memory is still 195.0MB. Free memory was 152.9MB in the beginning and 143.3MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 108]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:37:13,046 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:37:13,116 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 04:37:13,122 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:37:13,133 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:37:13,162 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:37:13,163 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:37:13,163 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:37:13,164 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:37:13,165 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:37:13,165 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:37:13,166 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:37:13,167 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:37:13,167 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:37:13,168 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:37:13,168 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:37:13,169 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:37:13,169 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:37:13,170 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:37:13,171 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:37:13,171 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 04:37:13,172 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 04:37:13,172 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 04:37:13,172 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:37:13,173 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 04:37:13,173 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 04:37:13,174 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 04:37:13,174 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 04:37:13,174 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:37:13,175 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:37:13,175 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:37:13,176 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:37:13,176 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:37:13,176 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:37:13,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:37:13,177 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:37:13,177 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:37:13,177 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 04:37:13,178 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 04:37:13,178 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:37:13,178 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:37:13,178 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:37:13,179 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:37:13,179 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 04:37:13,179 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_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2023-11-29 04:37:13,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:37:13,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:37:13,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:37:13,485 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:37:13,485 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:37:13,487 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2023-11-29 04:37:16,366 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:37:16,571 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:37:16,572 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2023-11-29 04:37:16,581 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/data/5cb0a0ecc/f331bb2c9a9b458d8c5d77d9cd46f008/FLAG9314870fc [2023-11-29 04:37:16,597 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/data/5cb0a0ecc/f331bb2c9a9b458d8c5d77d9cd46f008 [2023-11-29 04:37:16,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:37:16,602 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:37:16,603 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:37:16,603 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:37:16,609 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:37:16,610 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:37:16" (1/1) ... [2023-11-29 04:37:16,611 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67894a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16, skipping insertion in model container [2023-11-29 04:37:16,611 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:37:16" (1/1) ... [2023-11-29 04:37:16,638 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:37:16,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:37:16,853 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 04:37:16,858 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:37:16,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:37:16,882 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:37:16,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:37:16,948 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:37:16,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16 WrapperNode [2023-11-29 04:37:16,949 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:37:16,950 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:37:16,951 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:37:16,951 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:37:16,959 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16" (1/1) ... [2023-11-29 04:37:16,972 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16" (1/1) ... [2023-11-29 04:37:17,005 INFO L138 Inliner]: procedures = 26, calls = 38, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 167 [2023-11-29 04:37:17,005 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:37:17,006 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:37:17,006 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:37:17,007 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:37:17,019 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16" (1/1) ... [2023-11-29 04:37:17,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16" (1/1) ... [2023-11-29 04:37:17,025 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16" (1/1) ... [2023-11-29 04:37:17,044 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 7, 2, 2]. 54 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 04:37:17,045 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16" (1/1) ... [2023-11-29 04:37:17,045 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16" (1/1) ... [2023-11-29 04:37:17,059 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16" (1/1) ... [2023-11-29 04:37:17,064 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16" (1/1) ... [2023-11-29 04:37:17,067 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16" (1/1) ... [2023-11-29 04:37:17,069 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16" (1/1) ... [2023-11-29 04:37:17,073 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:37:17,074 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:37:17,074 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:37:17,075 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:37:17,076 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16" (1/1) ... [2023-11-29 04:37:17,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:37:17,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:37:17,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:37:17,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:37:17,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:37:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 04:37:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 04:37:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 04:37:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 04:37:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:37:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 04:37:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 04:37:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 04:37:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 04:37:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 04:37:17,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 04:37:17,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 04:37:17,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 04:37:17,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:37:17,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:37:17,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:37:17,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:37:17,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 04:37:17,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 04:37:17,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 04:37:17,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 04:37:17,152 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 04:37:17,285 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:37:17,287 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:37:17,816 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:37:18,107 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:37:18,107 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 04:37:18,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:37:18 BoogieIcfgContainer [2023-11-29 04:37:18,108 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:37:18,110 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:37:18,110 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:37:18,114 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:37:18,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:37:16" (1/3) ... [2023-11-29 04:37:18,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74bec895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:37:18, skipping insertion in model container [2023-11-29 04:37:18,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:37:16" (2/3) ... [2023-11-29 04:37:18,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74bec895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:37:18, skipping insertion in model container [2023-11-29 04:37:18,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:37:18" (3/3) ... [2023-11-29 04:37:18,116 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2023-11-29 04:37:18,136 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:37:18,136 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-11-29 04:37:18,136 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 04:37:18,190 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 04:37:18,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 136 flow [2023-11-29 04:37:18,249 INFO L124 PetriNetUnfolderBase]: 5/59 cut-off events. [2023-11-29 04:37:18,249 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 04:37:18,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 59 events. 5/59 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 147 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-11-29 04:37:18,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 61 transitions, 136 flow [2023-11-29 04:37:18,257 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 58 transitions, 128 flow [2023-11-29 04:37:18,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:37:18,273 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;@2eec4f7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:37:18,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-11-29 04:37:18,276 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 04:37:18,277 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 04:37:18,277 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 04:37:18,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:37:18,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:37:18,278 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:37:18,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:18,282 INFO L85 PathProgramCache]: Analyzing trace with hash 544674, now seen corresponding path program 1 times [2023-11-29 04:37:18,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:37:18,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563535743] [2023-11-29 04:37:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:18,293 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 [2023-11-29 04:37:18,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:37:18,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:37:18,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:37:18,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:37:18,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:18,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-29 04:37:18,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:18,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 04:37:18,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:18,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 04:37:18,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:18,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 04:37:18,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:18,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 04:37:18,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:18,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 04:37:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:18,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:37:18,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:37:18,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563535743] [2023-11-29 04:37:18,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563535743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:37:18,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:37:18,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:37:18,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526044515] [2023-11-29 04:37:18,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:37:18,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:37:18,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:37:18,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:37:18,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:37:18,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 61 [2023-11-29 04:37:18,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:18,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:37:18,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 61 [2023-11-29 04:37:18,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:37:18,930 INFO L124 PetriNetUnfolderBase]: 145/393 cut-off events. [2023-11-29 04:37:18,931 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-29 04:37:18,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 393 events. 145/393 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2242 event pairs, 97 based on Foata normal form. 1/289 useless extension candidates. Maximal degree in co-relation 583. Up to 237 conditions per place. [2023-11-29 04:37:18,938 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 24 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-11-29 04:37:18,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 55 transitions, 174 flow [2023-11-29 04:37:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:37:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:37:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2023-11-29 04:37:18,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6775956284153005 [2023-11-29 04:37:18,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 124 transitions. [2023-11-29 04:37:18,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 124 transitions. [2023-11-29 04:37:18,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:37:18,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 124 transitions. [2023-11-29 04:37:18,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:18,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:18,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:18,966 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 128 flow. Second operand 3 states and 124 transitions. [2023-11-29 04:37:18,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 55 transitions, 174 flow [2023-11-29 04:37:18,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 166 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 04:37:18,974 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 118 flow [2023-11-29 04:37:18,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2023-11-29 04:37:18,980 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-11-29 04:37:18,981 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 118 flow [2023-11-29 04:37:18,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:18,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:37:18,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:37:18,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:19,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:37:19,184 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:37:19,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:19,185 INFO L85 PathProgramCache]: Analyzing trace with hash 544675, now seen corresponding path program 1 times [2023-11-29 04:37:19,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:37:19,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933617175] [2023-11-29 04:37:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:19,186 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 [2023-11-29 04:37:19,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:37:19,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:37:19,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:37:19,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:37:19,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:19,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 04:37:19,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:19,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:37:19,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:19,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:37:19,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:19,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 04:37:19,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:19,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:37:19,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:19,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:37:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:19,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:37:19,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:37:19,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933617175] [2023-11-29 04:37:19,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933617175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:37:19,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:37:19,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:37:19,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458120171] [2023-11-29 04:37:19,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:37:19,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:37:19,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:37:19,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:37:19,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:37:19,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 61 [2023-11-29 04:37:19,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:19,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:37:19,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 61 [2023-11-29 04:37:19,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:37:19,957 INFO L124 PetriNetUnfolderBase]: 145/395 cut-off events. [2023-11-29 04:37:19,958 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-29 04:37:19,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 395 events. 145/395 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2241 event pairs, 97 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 628. Up to 241 conditions per place. [2023-11-29 04:37:19,964 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 27 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-29 04:37:19,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 57 transitions, 180 flow [2023-11-29 04:37:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:37:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:37:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2023-11-29 04:37:19,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6939890710382514 [2023-11-29 04:37:19,967 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 127 transitions. [2023-11-29 04:37:19,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 127 transitions. [2023-11-29 04:37:19,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:37:19,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 127 transitions. [2023-11-29 04:37:19,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:19,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:19,971 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:19,971 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 118 flow. Second operand 3 states and 127 transitions. [2023-11-29 04:37:19,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 57 transitions, 180 flow [2023-11-29 04:37:19,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 57 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 04:37:19,974 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 128 flow [2023-11-29 04:37:19,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-11-29 04:37:19,975 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2023-11-29 04:37:19,975 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 128 flow [2023-11-29 04:37:19,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:19,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:37:19,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 04:37:19,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 04:37:20,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:37:20,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:37:20,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:20,177 INFO L85 PathProgramCache]: Analyzing trace with hash 523450772, now seen corresponding path program 1 times [2023-11-29 04:37:20,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:37:20,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121576582] [2023-11-29 04:37:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:20,178 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 [2023-11-29 04:37:20,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:37:20,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:37:20,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:37:20,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 04:37:20,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:20,297 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:37:20,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-29 04:37:20,329 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 04:37:20,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-29 04:37:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:37:20,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:37:20,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:37:20,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121576582] [2023-11-29 04:37:20,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121576582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:37:20,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:37:20,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:37:20,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185368409] [2023-11-29 04:37:20,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:37:20,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:37:20,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:37:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:37:20,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:37:20,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 61 [2023-11-29 04:37:20,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:20,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:37:20,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 61 [2023-11-29 04:37:20,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:37:20,723 INFO L124 PetriNetUnfolderBase]: 239/562 cut-off events. [2023-11-29 04:37:20,723 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-29 04:37:20,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955 conditions, 562 events. 239/562 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3133 event pairs, 164 based on Foata normal form. 0/431 useless extension candidates. Maximal degree in co-relation 942. Up to 378 conditions per place. [2023-11-29 04:37:20,729 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 28 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-11-29 04:37:20,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 182 flow [2023-11-29 04:37:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:37:20,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:37:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2023-11-29 04:37:20,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639344262295082 [2023-11-29 04:37:20,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 117 transitions. [2023-11-29 04:37:20,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 117 transitions. [2023-11-29 04:37:20,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:37:20,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 117 transitions. [2023-11-29 04:37:20,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:20,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:20,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:20,735 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 128 flow. Second operand 3 states and 117 transitions. [2023-11-29 04:37:20,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 182 flow [2023-11-29 04:37:20,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:37:20,737 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 124 flow [2023-11-29 04:37:20,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-11-29 04:37:20,738 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-11-29 04:37:20,738 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 124 flow [2023-11-29 04:37:20,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:20,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:37:20,739 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 04:37:20,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 04:37:20,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:37:20,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:37:20,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash 523450722, now seen corresponding path program 1 times [2023-11-29 04:37:20,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:37:20,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584491794] [2023-11-29 04:37:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:20,941 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 [2023-11-29 04:37:20,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:37:20,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:37:20,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:37:21,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:37:21,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:21,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 04:37:21,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:21,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:37:21,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:21,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:37:21,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:21,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:37:21,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:21,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 04:37:21,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:21,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:37:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:21,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:37:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:21,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:37:21,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584491794] [2023-11-29 04:37:21,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584491794] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:37:21,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:37:21,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2023-11-29 04:37:21,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334824158] [2023-11-29 04:37:21,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:37:21,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 04:37:21,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:37:21,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 04:37:21,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:37:22,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 61 [2023-11-29 04:37:22,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 124 flow. Second operand has 9 states, 9 states have (on average 33.111111111111114) internal successors, (298), 9 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:22,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:37:22,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 61 [2023-11-29 04:37:22,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:37:23,610 INFO L124 PetriNetUnfolderBase]: 148/395 cut-off events. [2023-11-29 04:37:23,610 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-29 04:37:23,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 395 events. 148/395 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2190 event pairs, 97 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 659. Up to 244 conditions per place. [2023-11-29 04:37:23,613 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 27 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2023-11-29 04:37:23,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 232 flow [2023-11-29 04:37:23,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:37:23,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 04:37:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 329 transitions. [2023-11-29 04:37:23,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.599271402550091 [2023-11-29 04:37:23,617 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 329 transitions. [2023-11-29 04:37:23,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 329 transitions. [2023-11-29 04:37:23,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:37:23,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 329 transitions. [2023-11-29 04:37:23,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 36.55555555555556) internal successors, (329), 9 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:23,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 61.0) internal successors, (610), 10 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:23,622 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 61.0) internal successors, (610), 10 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:23,622 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 124 flow. Second operand 9 states and 329 transitions. [2023-11-29 04:37:23,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 232 flow [2023-11-29 04:37:23,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 64 transitions, 231 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:37:23,624 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 197 flow [2023-11-29 04:37:23,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=197, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2023-11-29 04:37:23,625 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2023-11-29 04:37:23,625 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 197 flow [2023-11-29 04:37:23,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 33.111111111111114) internal successors, (298), 9 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:23,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:37:23,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 04:37:23,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 04:37:23,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:37:23,827 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:37:23,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:23,828 INFO L85 PathProgramCache]: Analyzing trace with hash 523450773, now seen corresponding path program 1 times [2023-11-29 04:37:23,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:37:23,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290064676] [2023-11-29 04:37:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:23,829 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 [2023-11-29 04:37:23,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:37:23,830 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:37:23,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:37:23,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:37:23,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:23,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:23,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-29 04:37:23,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 04:37:24,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:24,051 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 04:37:24,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-29 04:37:24,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 04:37:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:24,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:37:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:24,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:37:24,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290064676] [2023-11-29 04:37:24,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290064676] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:37:24,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:37:24,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2023-11-29 04:37:24,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315386690] [2023-11-29 04:37:24,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:37:24,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 04:37:24,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:37:24,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 04:37:24,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:37:25,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 61 [2023-11-29 04:37:25,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 197 flow. Second operand has 9 states, 9 states have (on average 30.11111111111111) internal successors, (271), 9 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:25,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:37:25,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 61 [2023-11-29 04:37:25,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:37:26,838 INFO L124 PetriNetUnfolderBase]: 242/562 cut-off events. [2023-11-29 04:37:26,838 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 04:37:26,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 562 events. 242/562 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3085 event pairs, 164 based on Foata normal form. 0/431 useless extension candidates. Maximal degree in co-relation 982. Up to 383 conditions per place. [2023-11-29 04:37:26,844 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 35 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-11-29 04:37:26,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 271 flow [2023-11-29 04:37:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:37:26,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:37:26,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2023-11-29 04:37:26,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5901639344262295 [2023-11-29 04:37:26,847 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 180 transitions. [2023-11-29 04:37:26,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 180 transitions. [2023-11-29 04:37:26,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:37:26,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 180 transitions. [2023-11-29 04:37:26,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:26,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:26,851 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:26,852 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 197 flow. Second operand 5 states and 180 transitions. [2023-11-29 04:37:26,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 271 flow [2023-11-29 04:37:26,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 62 transitions, 257 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 04:37:26,857 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 187 flow [2023-11-29 04:37:26,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-11-29 04:37:26,858 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2023-11-29 04:37:26,859 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 187 flow [2023-11-29 04:37:26,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.11111111111111) internal successors, (271), 9 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:26,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:37:26,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:37:26,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 04:37:27,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:37:27,061 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:37:27,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:27,062 INFO L85 PathProgramCache]: Analyzing trace with hash -903755355, now seen corresponding path program 1 times [2023-11-29 04:37:27,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:37:27,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503009407] [2023-11-29 04:37:27,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:27,064 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 [2023-11-29 04:37:27,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:37:27,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:37:27,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:37:27,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:37:27,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:27,198 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:37:27,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:37:27,220 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:37:27,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-29 04:37:27,241 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:37:27,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-29 04:37:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:37:27,379 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:37:27,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:37:27,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503009407] [2023-11-29 04:37:27,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503009407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:37:27,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:37:27,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:37:27,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953518730] [2023-11-29 04:37:27,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:37:27,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:37:27,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:37:27,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:37:27,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:37:27,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 61 [2023-11-29 04:37:27,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:27,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:37:27,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 61 [2023-11-29 04:37:27,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:37:27,635 INFO L124 PetriNetUnfolderBase]: 163/420 cut-off events. [2023-11-29 04:37:27,635 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-29 04:37:27,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 420 events. 163/420 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2241 event pairs, 108 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 728. Up to 278 conditions per place. [2023-11-29 04:37:27,640 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 38 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-11-29 04:37:27,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 261 flow [2023-11-29 04:37:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:37:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:37:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2023-11-29 04:37:27,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639344262295082 [2023-11-29 04:37:27,642 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 117 transitions. [2023-11-29 04:37:27,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 117 transitions. [2023-11-29 04:37:27,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:37:27,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 117 transitions. [2023-11-29 04:37:27,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:27,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:27,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:27,644 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 187 flow. Second operand 3 states and 117 transitions. [2023-11-29 04:37:27,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 261 flow [2023-11-29 04:37:27,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 255 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 04:37:27,648 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 179 flow [2023-11-29 04:37:27,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-11-29 04:37:27,649 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-11-29 04:37:27,649 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 179 flow [2023-11-29 04:37:27,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:27,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:37:27,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:37:27,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 04:37:27,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:37:27,858 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:37:27,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:27,858 INFO L85 PathProgramCache]: Analyzing trace with hash -903755354, now seen corresponding path program 1 times [2023-11-29 04:37:27,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:37:27,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046099616] [2023-11-29 04:37:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:27,859 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 [2023-11-29 04:37:27,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:37:27,861 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:37:27,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:37:27,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 04:37:27,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:28,026 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 04:37:28,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2023-11-29 04:37:28,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:28,076 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 04:37:28,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-29 04:37:28,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:28,129 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 04:37:28,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 04:37:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:28,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:37:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:29,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:37:29,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046099616] [2023-11-29 04:37:29,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046099616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:37:29,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:37:29,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2023-11-29 04:37:29,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461084774] [2023-11-29 04:37:29,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:37:29,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 04:37:29,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:37:29,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 04:37:29,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:37:30,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 61 [2023-11-29 04:37:30,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 179 flow. Second operand has 9 states, 9 states have (on average 30.555555555555557) internal successors, (275), 9 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:30,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:37:30,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 61 [2023-11-29 04:37:30,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:37:30,743 INFO L124 PetriNetUnfolderBase]: 163/417 cut-off events. [2023-11-29 04:37:30,743 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-29 04:37:30,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 417 events. 163/417 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2187 event pairs, 108 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 724. Up to 274 conditions per place. [2023-11-29 04:37:30,747 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 35 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-11-29 04:37:30,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 58 transitions, 253 flow [2023-11-29 04:37:30,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:37:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:37:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2023-11-29 04:37:30,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5901639344262295 [2023-11-29 04:37:30,750 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 180 transitions. [2023-11-29 04:37:30,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 180 transitions. [2023-11-29 04:37:30,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:37:30,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 180 transitions. [2023-11-29 04:37:30,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:30,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:30,752 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:30,752 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 179 flow. Second operand 5 states and 180 transitions. [2023-11-29 04:37:30,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 58 transitions, 253 flow [2023-11-29 04:37:30,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 58 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:37:30,755 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 182 flow [2023-11-29 04:37:30,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-11-29 04:37:30,756 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2023-11-29 04:37:30,756 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 182 flow [2023-11-29 04:37:30,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.555555555555557) internal successors, (275), 9 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:30,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:37:30,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:37:30,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:30,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:37:30,960 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:37:30,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2048366037, now seen corresponding path program 1 times [2023-11-29 04:37:30,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:37:30,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888006989] [2023-11-29 04:37:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:30,961 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 [2023-11-29 04:37:30,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:37:30,962 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:37:30,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:37:31,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 04:37:31,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:31,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-29 04:37:31,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:31,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 04:37:31,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:31,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 04:37:31,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:31,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 04:37:31,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:31,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 04:37:31,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:31,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 04:37:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:37:31,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:37:31,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:37:31,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888006989] [2023-11-29 04:37:31,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888006989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:37:31,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:37:31,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:37:31,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471849286] [2023-11-29 04:37:31,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:37:31,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:37:31,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:37:31,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:37:31,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:37:31,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 61 [2023-11-29 04:37:31,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:31,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:37:31,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 61 [2023-11-29 04:37:31,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:37:31,347 INFO L124 PetriNetUnfolderBase]: 148/332 cut-off events. [2023-11-29 04:37:31,347 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-29 04:37:31,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 332 events. 148/332 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1492 event pairs, 97 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 614. Up to 239 conditions per place. [2023-11-29 04:37:31,350 INFO L140 encePairwiseOnDemand]: 53/61 looper letters, 32 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-11-29 04:37:31,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 52 transitions, 244 flow [2023-11-29 04:37:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:37:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:37:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2023-11-29 04:37:31,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5573770491803278 [2023-11-29 04:37:31,351 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 136 transitions. [2023-11-29 04:37:31,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 136 transitions. [2023-11-29 04:37:31,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:37:31,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 136 transitions. [2023-11-29 04:37:31,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:31,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:31,353 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:31,353 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 182 flow. Second operand 4 states and 136 transitions. [2023-11-29 04:37:31,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 52 transitions, 244 flow [2023-11-29 04:37:31,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 52 transitions, 238 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 04:37:31,356 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 174 flow [2023-11-29 04:37:31,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-11-29 04:37:31,357 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2023-11-29 04:37:31,357 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 174 flow [2023-11-29 04:37:31,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:31,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:37:31,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:37:31,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 04:37:31,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:37:31,561 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:37:31,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:31,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2048366038, now seen corresponding path program 1 times [2023-11-29 04:37:31,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:37:31,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140680927] [2023-11-29 04:37:31,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:31,562 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 [2023-11-29 04:37:31,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:37:31,563 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:37:31,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:37:31,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:37:31,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:31,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:37:31,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-11-29 04:37:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:32,030 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:37:32,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140680927] [2023-11-29 04:37:32,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140680927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:37:32,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:37:32,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-29 04:37:32,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223517081] [2023-11-29 04:37:32,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:37:32,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:37:32,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:37:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:37:32,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:37:33,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 61 [2023-11-29 04:37:33,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 174 flow. Second operand has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:33,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:37:33,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 61 [2023-11-29 04:37:33,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:37:33,796 INFO L124 PetriNetUnfolderBase]: 326/635 cut-off events. [2023-11-29 04:37:33,796 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-29 04:37:33,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1216 conditions, 635 events. 326/635 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3151 event pairs, 111 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 1202. Up to 299 conditions per place. [2023-11-29 04:37:33,800 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 50 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2023-11-29 04:37:33,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 333 flow [2023-11-29 04:37:33,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:37:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 04:37:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 245 transitions. [2023-11-29 04:37:33,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6693989071038251 [2023-11-29 04:37:33,802 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 245 transitions. [2023-11-29 04:37:33,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 245 transitions. [2023-11-29 04:37:33,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:37:33,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 245 transitions. [2023-11-29 04:37:33,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 40.833333333333336) internal successors, (245), 6 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:33,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 61.0) internal successors, (427), 7 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:33,805 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 61.0) internal successors, (427), 7 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:33,805 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 174 flow. Second operand 6 states and 245 transitions. [2023-11-29 04:37:33,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 333 flow [2023-11-29 04:37:33,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 04:37:33,808 INFO L231 Difference]: Finished difference. Result has 62 places, 53 transitions, 195 flow [2023-11-29 04:37:33,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=62, PETRI_TRANSITIONS=53} [2023-11-29 04:37:33,809 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-11-29 04:37:33,809 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 53 transitions, 195 flow [2023-11-29 04:37:33,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:33,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:37:33,809 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:37:33,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 04:37:34,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:37:34,010 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:37:34,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:34,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1384759578, now seen corresponding path program 1 times [2023-11-29 04:37:34,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:37:34,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930353227] [2023-11-29 04:37:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:34,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:37:34,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:37:34,011 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:37:34,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:37:34,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 04:37:34,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:34,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 04:37:34,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:34,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:37:34,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:34,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:37:34,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:34,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:37:34,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:34,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:37:34,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:34,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:37:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:37:34,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:37:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:37:35,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:37:35,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930353227] [2023-11-29 04:37:35,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930353227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:37:35,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:37:35,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-29 04:37:35,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373009145] [2023-11-29 04:37:35,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:37:35,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:37:35,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:37:35,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:37:35,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:37:41,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 61 [2023-11-29 04:37:41,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 53 transitions, 195 flow. Second operand has 11 states, 11 states have (on average 32.81818181818182) internal successors, (361), 11 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:41,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:37:41,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 61 [2023-11-29 04:37:41,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:37:43,207 INFO L124 PetriNetUnfolderBase]: 833/1729 cut-off events. [2023-11-29 04:37:43,207 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2023-11-29 04:37:43,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3392 conditions, 1729 events. 833/1729 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10616 event pairs, 479 based on Foata normal form. 0/1532 useless extension candidates. Maximal degree in co-relation 3377. Up to 479 conditions per place. [2023-11-29 04:37:43,221 INFO L140 encePairwiseOnDemand]: 54/61 looper letters, 98 selfloop transitions, 16 changer transitions 0/127 dead transitions. [2023-11-29 04:37:43,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 127 transitions, 591 flow [2023-11-29 04:37:43,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:37:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 04:37:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 422 transitions. [2023-11-29 04:37:43,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6918032786885245 [2023-11-29 04:37:43,224 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 422 transitions. [2023-11-29 04:37:43,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 422 transitions. [2023-11-29 04:37:43,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:37:43,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 422 transitions. [2023-11-29 04:37:43,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 42.2) internal successors, (422), 10 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:43,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 61.0) internal successors, (671), 11 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:43,229 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 61.0) internal successors, (671), 11 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:43,229 INFO L175 Difference]: Start difference. First operand has 62 places, 53 transitions, 195 flow. Second operand 10 states and 422 transitions. [2023-11-29 04:37:43,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 127 transitions, 591 flow [2023-11-29 04:37:43,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 127 transitions, 582 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 04:37:43,233 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 256 flow [2023-11-29 04:37:43,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=256, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2023-11-29 04:37:43,233 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2023-11-29 04:37:43,234 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 256 flow [2023-11-29 04:37:43,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 32.81818181818182) internal successors, (361), 11 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:43,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:37:43,234 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 04:37:43,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 04:37:43,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:37:43,435 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:37:43,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash 314245151, now seen corresponding path program 2 times [2023-11-29 04:37:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:37:43,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343922219] [2023-11-29 04:37:43,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:37:43,436 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 [2023-11-29 04:37:43,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:37:43,437 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:37:43,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:43,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:37:43,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:37:43,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:37:43,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:43,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 04:37:43,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:43,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:37:43,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:43,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:37:43,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:43,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 04:37:43,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:43,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:37:43,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:43,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:37:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:43,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:37:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:44,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:37:44,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343922219] [2023-11-29 04:37:44,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343922219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:37:44,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:37:44,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 04:37:44,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333416974] [2023-11-29 04:37:44,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:37:44,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:37:44,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:37:44,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:37:44,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:37:47,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 61 [2023-11-29 04:37:47,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 256 flow. Second operand has 14 states, 14 states have (on average 33.57142857142857) internal successors, (470), 14 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:47,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:37:47,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 61 [2023-11-29 04:37:47,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:37:51,493 INFO L124 PetriNetUnfolderBase]: 824/1730 cut-off events. [2023-11-29 04:37:51,493 INFO L125 PetriNetUnfolderBase]: For 559/559 co-relation queries the response was YES. [2023-11-29 04:37:51,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3777 conditions, 1730 events. 824/1730 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10896 event pairs, 596 based on Foata normal form. 6/1667 useless extension candidates. Maximal degree in co-relation 3760. Up to 1341 conditions per place. [2023-11-29 04:37:51,503 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 34 selfloop transitions, 29 changer transitions 0/77 dead transitions. [2023-11-29 04:37:51,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 77 transitions, 526 flow [2023-11-29 04:37:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 04:37:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 04:37:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 734 transitions. [2023-11-29 04:37:51,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729898516783762 [2023-11-29 04:37:51,507 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 734 transitions. [2023-11-29 04:37:51,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 734 transitions. [2023-11-29 04:37:51,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:37:51,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 734 transitions. [2023-11-29 04:37:51,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 34.95238095238095) internal successors, (734), 21 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:51,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 61.0) internal successors, (1342), 22 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:51,512 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 61.0) internal successors, (1342), 22 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:51,512 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 256 flow. Second operand 21 states and 734 transitions. [2023-11-29 04:37:51,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 77 transitions, 526 flow [2023-11-29 04:37:51,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 518 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 04:37:51,516 INFO L231 Difference]: Finished difference. Result has 93 places, 77 transitions, 480 flow [2023-11-29 04:37:51,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=480, PETRI_PLACES=93, PETRI_TRANSITIONS=77} [2023-11-29 04:37:51,517 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 33 predicate places. [2023-11-29 04:37:51,517 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 77 transitions, 480 flow [2023-11-29 04:37:51,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 33.57142857142857) internal successors, (470), 14 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:51,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:37:51,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:37:51,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 04:37:51,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:37:51,718 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:37:51,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:51,718 INFO L85 PathProgramCache]: Analyzing trace with hash -332602352, now seen corresponding path program 1 times [2023-11-29 04:37:51,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:37:51,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716290384] [2023-11-29 04:37:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:51,719 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 [2023-11-29 04:37:51,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:37:51,720 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:37:51,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:37:51,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:37:51,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:51,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:37:52,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-11-29 04:37:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:52,242 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:37:52,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716290384] [2023-11-29 04:37:52,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716290384] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:37:52,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:37:52,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-29 04:37:52,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025246393] [2023-11-29 04:37:52,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:37:52,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:37:52,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:37:52,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:37:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:37:53,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 61 [2023-11-29 04:37:53,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 77 transitions, 480 flow. Second operand has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:53,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:37:53,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 61 [2023-11-29 04:37:53,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:37:54,080 INFO L124 PetriNetUnfolderBase]: 1763/3093 cut-off events. [2023-11-29 04:37:54,080 INFO L125 PetriNetUnfolderBase]: For 1527/1555 co-relation queries the response was YES. [2023-11-29 04:37:54,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7154 conditions, 3093 events. 1763/3093 cut-off events. For 1527/1555 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 18218 event pairs, 432 based on Foata normal form. 2/2745 useless extension candidates. Maximal degree in co-relation 7130. Up to 1912 conditions per place. [2023-11-29 04:37:54,100 INFO L140 encePairwiseOnDemand]: 52/61 looper letters, 74 selfloop transitions, 16 changer transitions 0/100 dead transitions. [2023-11-29 04:37:54,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 100 transitions, 744 flow [2023-11-29 04:37:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:37:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 04:37:54,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2023-11-29 04:37:54,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6092896174863388 [2023-11-29 04:37:54,103 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 223 transitions. [2023-11-29 04:37:54,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 223 transitions. [2023-11-29 04:37:54,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:37:54,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 223 transitions. [2023-11-29 04:37:54,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 37.166666666666664) internal successors, (223), 6 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:54,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 61.0) internal successors, (427), 7 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:54,105 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 61.0) internal successors, (427), 7 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:54,105 INFO L175 Difference]: Start difference. First operand has 93 places, 77 transitions, 480 flow. Second operand 6 states and 223 transitions. [2023-11-29 04:37:54,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 100 transitions, 744 flow [2023-11-29 04:37:54,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 100 transitions, 656 flow, removed 33 selfloop flow, removed 8 redundant places. [2023-11-29 04:37:54,113 INFO L231 Difference]: Finished difference. Result has 91 places, 80 transitions, 455 flow [2023-11-29 04:37:54,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=455, PETRI_PLACES=91, PETRI_TRANSITIONS=80} [2023-11-29 04:37:54,114 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 31 predicate places. [2023-11-29 04:37:54,114 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 80 transitions, 455 flow [2023-11-29 04:37:54,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:54,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:37:54,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:37:54,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:54,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:37:54,316 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:37:54,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:54,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1720737718, now seen corresponding path program 1 times [2023-11-29 04:37:54,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:37:54,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783801035] [2023-11-29 04:37:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:54,317 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 [2023-11-29 04:37:54,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:37:54,318 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:37:54,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:37:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:37:54,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 04:37:54,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:54,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 04:37:54,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:54,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:37:54,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:54,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:37:54,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:54,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 04:37:54,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:54,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:37:54,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:37:54,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:37:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:54,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:37:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:37:55,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:37:55,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783801035] [2023-11-29 04:37:55,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783801035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:37:55,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:37:55,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-29 04:37:55,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921942277] [2023-11-29 04:37:55,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:37:55,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:37:55,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:37:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:37:55,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:37:58,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 61 [2023-11-29 04:37:58,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 80 transitions, 455 flow. Second operand has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:58,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:37:58,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 61 [2023-11-29 04:37:58,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:00,301 INFO L124 PetriNetUnfolderBase]: 1533/2704 cut-off events. [2023-11-29 04:38:00,301 INFO L125 PetriNetUnfolderBase]: For 1403/1444 co-relation queries the response was YES. [2023-11-29 04:38:00,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6627 conditions, 2704 events. 1533/2704 cut-off events. For 1403/1444 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15155 event pairs, 831 based on Foata normal form. 0/2525 useless extension candidates. Maximal degree in co-relation 6602. Up to 943 conditions per place. [2023-11-29 04:38:00,319 INFO L140 encePairwiseOnDemand]: 46/61 looper letters, 93 selfloop transitions, 38 changer transitions 0/140 dead transitions. [2023-11-29 04:38:00,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 140 transitions, 903 flow [2023-11-29 04:38:00,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:38:00,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 04:38:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 378 transitions. [2023-11-29 04:38:00,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196721311475409 [2023-11-29 04:38:00,322 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 378 transitions. [2023-11-29 04:38:00,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 378 transitions. [2023-11-29 04:38:00,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:00,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 378 transitions. [2023-11-29 04:38:00,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 37.8) internal successors, (378), 10 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:00,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 61.0) internal successors, (671), 11 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:00,325 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 61.0) internal successors, (671), 11 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:00,325 INFO L175 Difference]: Start difference. First operand has 91 places, 80 transitions, 455 flow. Second operand 10 states and 378 transitions. [2023-11-29 04:38:00,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 140 transitions, 903 flow [2023-11-29 04:38:00,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 140 transitions, 878 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 04:38:00,330 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 612 flow [2023-11-29 04:38:00,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=612, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2023-11-29 04:38:00,330 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 38 predicate places. [2023-11-29 04:38:00,331 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 612 flow [2023-11-29 04:38:00,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:00,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:00,331 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:38:00,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 04:38:00,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:38:00,531 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:38:00,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:00,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1688126999, now seen corresponding path program 2 times [2023-11-29 04:38:00,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:00,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916960165] [2023-11-29 04:38:00,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:38:00,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:38:00,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:00,533 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:38:00,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:38:00,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:38:00,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:38:00,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 04:38:00,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:00,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 04:38:00,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:00,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:38:00,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:00,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:38:00,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:00,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:38:00,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:00,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:38:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:00,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:38:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 04:38:00,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:38:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 04:38:01,751 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:01,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916960165] [2023-11-29 04:38:01,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916960165] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:38:01,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:38:01,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-29 04:38:01,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609870102] [2023-11-29 04:38:01,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:38:01,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:38:01,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:01,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:38:01,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:38:04,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 61 [2023-11-29 04:38:04,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 612 flow. Second operand has 8 states, 8 states have (on average 34.5) internal successors, (276), 8 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:04,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:04,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 61 [2023-11-29 04:38:04,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:05,671 INFO L124 PetriNetUnfolderBase]: 1381/2491 cut-off events. [2023-11-29 04:38:05,671 INFO L125 PetriNetUnfolderBase]: For 1434/1438 co-relation queries the response was YES. [2023-11-29 04:38:05,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6805 conditions, 2491 events. 1381/2491 cut-off events. For 1434/1438 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14620 event pairs, 741 based on Foata normal form. 36/2517 useless extension candidates. Maximal degree in co-relation 6778. Up to 1635 conditions per place. [2023-11-29 04:38:05,688 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 94 selfloop transitions, 20 changer transitions 0/128 dead transitions. [2023-11-29 04:38:05,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 128 transitions, 991 flow [2023-11-29 04:38:05,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:38:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:38:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 201 transitions. [2023-11-29 04:38:05,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.659016393442623 [2023-11-29 04:38:05,690 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 201 transitions. [2023-11-29 04:38:05,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 201 transitions. [2023-11-29 04:38:05,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:05,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 201 transitions. [2023-11-29 04:38:05,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:05,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:05,692 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:05,692 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 612 flow. Second operand 5 states and 201 transitions. [2023-11-29 04:38:05,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 128 transitions, 991 flow [2023-11-29 04:38:05,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 128 transitions, 960 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 04:38:05,702 INFO L231 Difference]: Finished difference. Result has 95 places, 95 transitions, 613 flow [2023-11-29 04:38:05,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=613, PETRI_PLACES=95, PETRI_TRANSITIONS=95} [2023-11-29 04:38:05,702 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 35 predicate places. [2023-11-29 04:38:05,702 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 95 transitions, 613 flow [2023-11-29 04:38:05,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.5) internal successors, (276), 8 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:05,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:05,703 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:38:05,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 04:38:05,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:38:05,903 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:38:05,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:05,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2052545031, now seen corresponding path program 2 times [2023-11-29 04:38:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:05,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707221882] [2023-11-29 04:38:05,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:38:05,904 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 [2023-11-29 04:38:05,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:05,905 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:38:05,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:38:05,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:38:05,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:38:05,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 04:38:05,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:06,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 04:38:06,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:06,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:38:06,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:06,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:38:06,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:06,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:38:06,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:06,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:38:06,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:06,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 04:38:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 04:38:06,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:38:06,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:06,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707221882] [2023-11-29 04:38:06,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707221882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:38:06,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:38:06,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:38:06,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844063001] [2023-11-29 04:38:06,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:38:06,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:38:06,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:06,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:38:06,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:38:06,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 61 [2023-11-29 04:38:06,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 95 transitions, 613 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:06,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:06,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 61 [2023-11-29 04:38:06,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:07,207 INFO L124 PetriNetUnfolderBase]: 1394/2452 cut-off events. [2023-11-29 04:38:07,208 INFO L125 PetriNetUnfolderBase]: For 2156/2157 co-relation queries the response was YES. [2023-11-29 04:38:07,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6871 conditions, 2452 events. 1394/2452 cut-off events. For 2156/2157 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13656 event pairs, 537 based on Foata normal form. 80/2515 useless extension candidates. Maximal degree in co-relation 6845. Up to 1199 conditions per place. [2023-11-29 04:38:07,241 INFO L140 encePairwiseOnDemand]: 48/61 looper letters, 59 selfloop transitions, 35 changer transitions 0/103 dead transitions. [2023-11-29 04:38:07,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 103 transitions, 840 flow [2023-11-29 04:38:07,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:38:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:38:07,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2023-11-29 04:38:07,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580327868852459 [2023-11-29 04:38:07,243 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 177 transitions. [2023-11-29 04:38:07,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 177 transitions. [2023-11-29 04:38:07,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:07,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 177 transitions. [2023-11-29 04:38:07,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:07,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:07,246 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:07,246 INFO L175 Difference]: Start difference. First operand has 95 places, 95 transitions, 613 flow. Second operand 5 states and 177 transitions. [2023-11-29 04:38:07,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 103 transitions, 840 flow [2023-11-29 04:38:07,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 766 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 04:38:07,256 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 591 flow [2023-11-29 04:38:07,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=591, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2023-11-29 04:38:07,257 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 28 predicate places. [2023-11-29 04:38:07,257 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 591 flow [2023-11-29 04:38:07,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:07,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:07,257 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-29 04:38:07,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:38:07,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:38:07,458 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:38:07,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:07,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1939511385, now seen corresponding path program 3 times [2023-11-29 04:38:07,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:07,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400275738] [2023-11-29 04:38:07,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:38:07,458 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 [2023-11-29 04:38:07,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:07,459 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:38:07,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:38:07,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 04:38:07,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:38:07,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 04:38:07,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:07,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 04:38:07,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:07,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:38:07,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:07,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:38:07,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:07,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:38:07,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:07,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:38:07,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:07,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 04:38:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:38:08,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:38:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:38:11,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:11,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400275738] [2023-11-29 04:38:11,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400275738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:38:11,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:38:11,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-29 04:38:11,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513584116] [2023-11-29 04:38:11,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:38:11,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:38:11,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:11,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:38:11,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:38:24,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 61 [2023-11-29 04:38:24,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 591 flow. Second operand has 26 states, 26 states have (on average 33.76923076923077) internal successors, (878), 26 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:24,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:24,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 61 [2023-11-29 04:38:24,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:59,787 INFO L124 PetriNetUnfolderBase]: 1407/2489 cut-off events. [2023-11-29 04:38:59,788 INFO L125 PetriNetUnfolderBase]: For 2014/2018 co-relation queries the response was YES. [2023-11-29 04:38:59,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7031 conditions, 2489 events. 1407/2489 cut-off events. For 2014/2018 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13813 event pairs, 1041 based on Foata normal form. 12/2482 useless extension candidates. Maximal degree in co-relation 7007. Up to 2200 conditions per place. [2023-11-29 04:38:59,799 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 53 selfloop transitions, 65 changer transitions 0/126 dead transitions. [2023-11-29 04:38:59,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 126 transitions, 1187 flow [2023-11-29 04:38:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 04:38:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-29 04:38:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 1544 transitions. [2023-11-29 04:38:59,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5624772313296903 [2023-11-29 04:38:59,805 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 1544 transitions. [2023-11-29 04:38:59,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 1544 transitions. [2023-11-29 04:38:59,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:59,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 1544 transitions. [2023-11-29 04:38:59,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 34.31111111111111) internal successors, (1544), 45 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:59,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 61.0) internal successors, (2806), 46 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:59,816 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 61.0) internal successors, (2806), 46 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:59,816 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 591 flow. Second operand 45 states and 1544 transitions. [2023-11-29 04:38:59,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 126 transitions, 1187 flow [2023-11-29 04:38:59,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 1093 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 04:38:59,826 INFO L231 Difference]: Finished difference. Result has 140 places, 126 transitions, 1041 flow [2023-11-29 04:38:59,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1041, PETRI_PLACES=140, PETRI_TRANSITIONS=126} [2023-11-29 04:38:59,827 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 80 predicate places. [2023-11-29 04:38:59,828 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 126 transitions, 1041 flow [2023-11-29 04:38:59,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 33.76923076923077) internal successors, (878), 26 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:59,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:59,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:38:59,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:39:00,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:39:00,030 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:39:00,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:00,031 INFO L85 PathProgramCache]: Analyzing trace with hash 699365407, now seen corresponding path program 1 times [2023-11-29 04:39:00,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:00,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262692878] [2023-11-29 04:39:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:00,031 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 [2023-11-29 04:39:00,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:00,032 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:39:00,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:39:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:00,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:39:00,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:00,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:39:00,185 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:00,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262692878] [2023-11-29 04:39:00,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262692878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:39:00,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:39:00,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:39:00,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761096746] [2023-11-29 04:39:00,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:39:00,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:39:00,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:00,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:39:00,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:39:00,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-29 04:39:00,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 126 transitions, 1041 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:00,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:00,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-29 04:39:00,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:00,654 INFO L124 PetriNetUnfolderBase]: 1399/2495 cut-off events. [2023-11-29 04:39:00,654 INFO L125 PetriNetUnfolderBase]: For 1227/1227 co-relation queries the response was YES. [2023-11-29 04:39:00,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6586 conditions, 2495 events. 1399/2495 cut-off events. For 1227/1227 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14012 event pairs, 375 based on Foata normal form. 3/2481 useless extension candidates. Maximal degree in co-relation 6550. Up to 1730 conditions per place. [2023-11-29 04:39:00,666 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 137 selfloop transitions, 11 changer transitions 1/158 dead transitions. [2023-11-29 04:39:00,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 158 transitions, 1468 flow [2023-11-29 04:39:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:39:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:39:00,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2023-11-29 04:39:00,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7868852459016393 [2023-11-29 04:39:00,668 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 144 transitions. [2023-11-29 04:39:00,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 144 transitions. [2023-11-29 04:39:00,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:00,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 144 transitions. [2023-11-29 04:39:00,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:00,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:00,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:00,669 INFO L175 Difference]: Start difference. First operand has 140 places, 126 transitions, 1041 flow. Second operand 3 states and 144 transitions. [2023-11-29 04:39:00,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 158 transitions, 1468 flow [2023-11-29 04:39:00,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 158 transitions, 1284 flow, removed 63 selfloop flow, removed 20 redundant places. [2023-11-29 04:39:00,682 INFO L231 Difference]: Finished difference. Result has 123 places, 136 transitions, 970 flow [2023-11-29 04:39:00,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=970, PETRI_PLACES=123, PETRI_TRANSITIONS=136} [2023-11-29 04:39:00,682 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 63 predicate places. [2023-11-29 04:39:00,682 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 136 transitions, 970 flow [2023-11-29 04:39:00,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:00,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:00,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:00,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 04:39:00,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:39:00,883 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:39:00,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash -259144709, now seen corresponding path program 1 times [2023-11-29 04:39:00,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:00,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889481169] [2023-11-29 04:39:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:00,884 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 [2023-11-29 04:39:00,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:00,884 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:39:00,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:39:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:00,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:39:00,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:01,028 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:39:01,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:01,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889481169] [2023-11-29 04:39:01,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889481169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:39:01,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:39:01,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:39:01,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346479167] [2023-11-29 04:39:01,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:39:01,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:39:01,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:01,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:39:01,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:39:01,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 61 [2023-11-29 04:39:01,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 136 transitions, 970 flow. Second operand has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:01,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:01,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 61 [2023-11-29 04:39:01,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:01,654 INFO L124 PetriNetUnfolderBase]: 1466/2690 cut-off events. [2023-11-29 04:39:01,655 INFO L125 PetriNetUnfolderBase]: For 1825/1843 co-relation queries the response was YES. [2023-11-29 04:39:01,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7327 conditions, 2690 events. 1466/2690 cut-off events. For 1825/1843 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15819 event pairs, 672 based on Foata normal form. 33/2721 useless extension candidates. Maximal degree in co-relation 7290. Up to 1389 conditions per place. [2023-11-29 04:39:01,669 INFO L140 encePairwiseOnDemand]: 54/61 looper letters, 196 selfloop transitions, 10 changer transitions 0/214 dead transitions. [2023-11-29 04:39:01,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 214 transitions, 1750 flow [2023-11-29 04:39:01,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:39:01,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:39:01,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 228 transitions. [2023-11-29 04:39:01,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7475409836065574 [2023-11-29 04:39:01,671 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 228 transitions. [2023-11-29 04:39:01,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 228 transitions. [2023-11-29 04:39:01,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:01,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 228 transitions. [2023-11-29 04:39:01,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:01,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:01,673 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:01,673 INFO L175 Difference]: Start difference. First operand has 123 places, 136 transitions, 970 flow. Second operand 5 states and 228 transitions. [2023-11-29 04:39:01,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 214 transitions, 1750 flow [2023-11-29 04:39:01,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 214 transitions, 1724 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:39:01,686 INFO L231 Difference]: Finished difference. Result has 129 places, 139 transitions, 1016 flow [2023-11-29 04:39:01,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1016, PETRI_PLACES=129, PETRI_TRANSITIONS=139} [2023-11-29 04:39:01,687 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 69 predicate places. [2023-11-29 04:39:01,687 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 139 transitions, 1016 flow [2023-11-29 04:39:01,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:01,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:01,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:01,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 04:39:01,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:39:01,890 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:39:01,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:01,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1007124801, now seen corresponding path program 2 times [2023-11-29 04:39:01,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:01,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721063284] [2023-11-29 04:39:01,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:39:01,892 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 [2023-11-29 04:39:01,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:01,892 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:39:01,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:39:01,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:39:01,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:01,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:39:01,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:02,008 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:39:02,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:02,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721063284] [2023-11-29 04:39:02,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721063284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:39:02,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:39:02,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:39:02,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859135275] [2023-11-29 04:39:02,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:39:02,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:39:02,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:02,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:39:02,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:39:02,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 61 [2023-11-29 04:39:02,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 139 transitions, 1016 flow. Second operand has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:02,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:02,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 61 [2023-11-29 04:39:02,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:02,585 INFO L124 PetriNetUnfolderBase]: 1376/2436 cut-off events. [2023-11-29 04:39:02,585 INFO L125 PetriNetUnfolderBase]: For 2843/2849 co-relation queries the response was YES. [2023-11-29 04:39:02,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7669 conditions, 2436 events. 1376/2436 cut-off events. For 2843/2849 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13199 event pairs, 615 based on Foata normal form. 96/2528 useless extension candidates. Maximal degree in co-relation 7629. Up to 1600 conditions per place. [2023-11-29 04:39:02,598 INFO L140 encePairwiseOnDemand]: 54/61 looper letters, 165 selfloop transitions, 15 changer transitions 1/188 dead transitions. [2023-11-29 04:39:02,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 188 transitions, 1643 flow [2023-11-29 04:39:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:39:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:39:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 210 transitions. [2023-11-29 04:39:02,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6885245901639344 [2023-11-29 04:39:02,600 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 210 transitions. [2023-11-29 04:39:02,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 210 transitions. [2023-11-29 04:39:02,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:02,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 210 transitions. [2023-11-29 04:39:02,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:02,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:02,601 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:02,601 INFO L175 Difference]: Start difference. First operand has 129 places, 139 transitions, 1016 flow. Second operand 5 states and 210 transitions. [2023-11-29 04:39:02,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 188 transitions, 1643 flow [2023-11-29 04:39:02,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 188 transitions, 1573 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-29 04:39:02,613 INFO L231 Difference]: Finished difference. Result has 134 places, 137 transitions, 1005 flow [2023-11-29 04:39:02,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1005, PETRI_PLACES=134, PETRI_TRANSITIONS=137} [2023-11-29 04:39:02,614 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 74 predicate places. [2023-11-29 04:39:02,614 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 137 transitions, 1005 flow [2023-11-29 04:39:02,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:02,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:02,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:02,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:39:02,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:39:02,815 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:39:02,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:02,815 INFO L85 PathProgramCache]: Analyzing trace with hash 849804448, now seen corresponding path program 1 times [2023-11-29 04:39:02,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:02,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543857231] [2023-11-29 04:39:02,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:02,816 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 [2023-11-29 04:39:02,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:02,817 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:39:02,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:39:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:02,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 04:39:02,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:02,986 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:39:02,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:02,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543857231] [2023-11-29 04:39:02,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543857231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:39:02,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:39:02,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 04:39:02,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702633975] [2023-11-29 04:39:02,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:39:02,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:39:02,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:39:02,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:39:03,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-29 04:39:03,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 137 transitions, 1005 flow. Second operand has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:03,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:03,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-29 04:39:03,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:03,769 INFO L124 PetriNetUnfolderBase]: 1544/2799 cut-off events. [2023-11-29 04:39:03,769 INFO L125 PetriNetUnfolderBase]: For 3851/3851 co-relation queries the response was YES. [2023-11-29 04:39:03,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9354 conditions, 2799 events. 1544/2799 cut-off events. For 3851/3851 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16670 event pairs, 487 based on Foata normal form. 36/2831 useless extension candidates. Maximal degree in co-relation 9311. Up to 1297 conditions per place. [2023-11-29 04:39:03,789 INFO L140 encePairwiseOnDemand]: 52/61 looper letters, 192 selfloop transitions, 34 changer transitions 2/237 dead transitions. [2023-11-29 04:39:03,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 237 transitions, 2026 flow [2023-11-29 04:39:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:39:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 04:39:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 343 transitions. [2023-11-29 04:39:03,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7028688524590164 [2023-11-29 04:39:03,790 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 343 transitions. [2023-11-29 04:39:03,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 343 transitions. [2023-11-29 04:39:03,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:03,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 343 transitions. [2023-11-29 04:39:03,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 42.875) internal successors, (343), 8 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:03,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 61.0) internal successors, (549), 9 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:03,793 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 61.0) internal successors, (549), 9 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:03,793 INFO L175 Difference]: Start difference. First operand has 134 places, 137 transitions, 1005 flow. Second operand 8 states and 343 transitions. [2023-11-29 04:39:03,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 237 transitions, 2026 flow [2023-11-29 04:39:03,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 237 transitions, 1966 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-29 04:39:03,813 INFO L231 Difference]: Finished difference. Result has 145 places, 162 transitions, 1315 flow [2023-11-29 04:39:03,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1315, PETRI_PLACES=145, PETRI_TRANSITIONS=162} [2023-11-29 04:39:03,814 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 85 predicate places. [2023-11-29 04:39:03,814 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 162 transitions, 1315 flow [2023-11-29 04:39:03,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:03,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:03,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:03,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 04:39:04,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:39:04,015 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:39:04,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:04,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1220368012, now seen corresponding path program 2 times [2023-11-29 04:39:04,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:04,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393194749] [2023-11-29 04:39:04,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:39:04,016 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 [2023-11-29 04:39:04,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:04,017 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:39:04,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:39:04,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:39:04,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:04,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 04:39:04,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:04,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:39:04,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:04,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393194749] [2023-11-29 04:39:04,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393194749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:39:04,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:39:04,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 04:39:04,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549665610] [2023-11-29 04:39:04,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:39:04,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:39:04,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:04,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:39:04,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:39:04,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-29 04:39:04,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 162 transitions, 1315 flow. Second operand has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:04,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:04,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-29 04:39:04,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:05,014 INFO L124 PetriNetUnfolderBase]: 1736/3164 cut-off events. [2023-11-29 04:39:05,014 INFO L125 PetriNetUnfolderBase]: For 7657/7657 co-relation queries the response was YES. [2023-11-29 04:39:05,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11812 conditions, 3164 events. 1736/3164 cut-off events. For 7657/7657 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 18854 event pairs, 535 based on Foata normal form. 36/3190 useless extension candidates. Maximal degree in co-relation 11763. Up to 1364 conditions per place. [2023-11-29 04:39:05,038 INFO L140 encePairwiseOnDemand]: 52/61 looper letters, 225 selfloop transitions, 44 changer transitions 1/279 dead transitions. [2023-11-29 04:39:05,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 279 transitions, 2623 flow [2023-11-29 04:39:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:39:05,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 04:39:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 414 transitions. [2023-11-29 04:39:05,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6786885245901639 [2023-11-29 04:39:05,039 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 414 transitions. [2023-11-29 04:39:05,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 414 transitions. [2023-11-29 04:39:05,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:05,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 414 transitions. [2023-11-29 04:39:05,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 41.4) internal successors, (414), 10 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:05,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 61.0) internal successors, (671), 11 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:05,042 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 61.0) internal successors, (671), 11 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:05,042 INFO L175 Difference]: Start difference. First operand has 145 places, 162 transitions, 1315 flow. Second operand 10 states and 414 transitions. [2023-11-29 04:39:05,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 279 transitions, 2623 flow [2023-11-29 04:39:05,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 279 transitions, 2550 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-11-29 04:39:05,097 INFO L231 Difference]: Finished difference. Result has 160 places, 181 transitions, 1649 flow [2023-11-29 04:39:05,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1649, PETRI_PLACES=160, PETRI_TRANSITIONS=181} [2023-11-29 04:39:05,098 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 100 predicate places. [2023-11-29 04:39:05,098 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 181 transitions, 1649 flow [2023-11-29 04:39:05,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:05,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:05,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:05,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:39:05,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:39:05,299 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:39:05,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1066409974, now seen corresponding path program 3 times [2023-11-29 04:39:05,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:05,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35176217] [2023-11-29 04:39:05,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:39:05,300 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 [2023-11-29 04:39:05,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:05,301 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:39:05,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 04:39:05,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 04:39:05,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:05,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 04:39:05,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:05,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:39:05,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:05,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35176217] [2023-11-29 04:39:05,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35176217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:39:05,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:39:05,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 04:39:05,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648438301] [2023-11-29 04:39:05,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:39:05,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:39:05,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:05,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:39:05,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:39:05,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-29 04:39:05,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 181 transitions, 1649 flow. Second operand has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:05,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:05,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-29 04:39:05,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:06,377 INFO L124 PetriNetUnfolderBase]: 1781/3285 cut-off events. [2023-11-29 04:39:06,378 INFO L125 PetriNetUnfolderBase]: For 14978/14978 co-relation queries the response was YES. [2023-11-29 04:39:06,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13467 conditions, 3285 events. 1781/3285 cut-off events. For 14978/14978 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 20045 event pairs, 801 based on Foata normal form. 36/3311 useless extension candidates. Maximal degree in co-relation 13411. Up to 2108 conditions per place. [2023-11-29 04:39:06,402 INFO L140 encePairwiseOnDemand]: 51/61 looper letters, 202 selfloop transitions, 63 changer transitions 2/276 dead transitions. [2023-11-29 04:39:06,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 276 transitions, 2969 flow [2023-11-29 04:39:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:39:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 04:39:06,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 337 transitions. [2023-11-29 04:39:06,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6905737704918032 [2023-11-29 04:39:06,403 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 337 transitions. [2023-11-29 04:39:06,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 337 transitions. [2023-11-29 04:39:06,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:06,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 337 transitions. [2023-11-29 04:39:06,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 42.125) internal successors, (337), 8 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:06,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 61.0) internal successors, (549), 9 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:06,405 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 61.0) internal successors, (549), 9 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:06,405 INFO L175 Difference]: Start difference. First operand has 160 places, 181 transitions, 1649 flow. Second operand 8 states and 337 transitions. [2023-11-29 04:39:06,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 276 transitions, 2969 flow [2023-11-29 04:39:06,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 276 transitions, 2854 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-11-29 04:39:06,454 INFO L231 Difference]: Finished difference. Result has 169 places, 221 transitions, 2336 flow [2023-11-29 04:39:06,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2336, PETRI_PLACES=169, PETRI_TRANSITIONS=221} [2023-11-29 04:39:06,455 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 109 predicate places. [2023-11-29 04:39:06,455 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 221 transitions, 2336 flow [2023-11-29 04:39:06,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:06,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:06,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:06,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 04:39:06,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:39:06,656 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:39:06,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash -805352462, now seen corresponding path program 1 times [2023-11-29 04:39:06,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:06,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58255325] [2023-11-29 04:39:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:06,657 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 [2023-11-29 04:39:06,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:06,658 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:39:06,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-29 04:39:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:06,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:39:06,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:06,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:07,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:07,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58255325] [2023-11-29 04:39:07,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58255325] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:39:07,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:39:07,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-29 04:39:07,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955094765] [2023-11-29 04:39:07,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:07,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:39:07,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:39:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:39:07,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 61 [2023-11-29 04:39:07,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 221 transitions, 2336 flow. Second operand has 14 states, 14 states have (on average 34.5) internal successors, (483), 14 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:07,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:07,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 61 [2023-11-29 04:39:07,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:10,434 INFO L124 PetriNetUnfolderBase]: 3583/6747 cut-off events. [2023-11-29 04:39:10,435 INFO L125 PetriNetUnfolderBase]: For 25488/25489 co-relation queries the response was YES. [2023-11-29 04:39:10,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25417 conditions, 6747 events. 3583/6747 cut-off events. For 25488/25489 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 49071 event pairs, 407 based on Foata normal form. 81/6828 useless extension candidates. Maximal degree in co-relation 25355. Up to 1125 conditions per place. [2023-11-29 04:39:10,483 INFO L140 encePairwiseOnDemand]: 45/61 looper letters, 454 selfloop transitions, 203 changer transitions 9/674 dead transitions. [2023-11-29 04:39:10,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 674 transitions, 6374 flow [2023-11-29 04:39:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 04:39:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 04:39:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1194 transitions. [2023-11-29 04:39:10,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6749576031656302 [2023-11-29 04:39:10,485 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1194 transitions. [2023-11-29 04:39:10,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1194 transitions. [2023-11-29 04:39:10,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:10,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1194 transitions. [2023-11-29 04:39:10,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 41.172413793103445) internal successors, (1194), 29 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:10,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 61.0) internal successors, (1830), 30 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:10,489 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 61.0) internal successors, (1830), 30 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:10,489 INFO L175 Difference]: Start difference. First operand has 169 places, 221 transitions, 2336 flow. Second operand 29 states and 1194 transitions. [2023-11-29 04:39:10,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 674 transitions, 6374 flow [2023-11-29 04:39:10,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 674 transitions, 6290 flow, removed 42 selfloop flow, removed 0 redundant places. [2023-11-29 04:39:10,636 INFO L231 Difference]: Finished difference. Result has 217 places, 363 transitions, 4091 flow [2023-11-29 04:39:10,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4091, PETRI_PLACES=217, PETRI_TRANSITIONS=363} [2023-11-29 04:39:10,636 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 157 predicate places. [2023-11-29 04:39:10,636 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 363 transitions, 4091 flow [2023-11-29 04:39:10,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.5) internal successors, (483), 14 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:10,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:10,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:10,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-11-29 04:39:10,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:39:10,837 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:39:10,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:10,838 INFO L85 PathProgramCache]: Analyzing trace with hash 650721724, now seen corresponding path program 2 times [2023-11-29 04:39:10,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:10,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170515054] [2023-11-29 04:39:10,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:39:10,838 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 [2023-11-29 04:39:10,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:10,839 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:39:10,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-29 04:39:10,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:39:10,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:10,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:39:10,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:11,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:11,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:11,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170515054] [2023-11-29 04:39:11,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170515054] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:39:11,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:39:11,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 04:39:11,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727727272] [2023-11-29 04:39:11,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:11,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 04:39:11,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:11,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 04:39:11,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:39:11,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 61 [2023-11-29 04:39:11,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 363 transitions, 4091 flow. Second operand has 12 states, 12 states have (on average 33.75) internal successors, (405), 12 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:11,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:11,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 61 [2023-11-29 04:39:11,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:15,332 INFO L124 PetriNetUnfolderBase]: 5279/9979 cut-off events. [2023-11-29 04:39:15,332 INFO L125 PetriNetUnfolderBase]: For 72532/72532 co-relation queries the response was YES. [2023-11-29 04:39:15,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50154 conditions, 9979 events. 5279/9979 cut-off events. For 72532/72532 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 78036 event pairs, 865 based on Foata normal form. 108/10087 useless extension candidates. Maximal degree in co-relation 50072. Up to 2230 conditions per place. [2023-11-29 04:39:15,460 INFO L140 encePairwiseOnDemand]: 45/61 looper letters, 514 selfloop transitions, 421 changer transitions 0/942 dead transitions. [2023-11-29 04:39:15,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 942 transitions, 12246 flow [2023-11-29 04:39:15,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 04:39:15,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 04:39:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 987 transitions. [2023-11-29 04:39:15,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7034925160370634 [2023-11-29 04:39:15,463 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 987 transitions. [2023-11-29 04:39:15,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 987 transitions. [2023-11-29 04:39:15,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:15,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 987 transitions. [2023-11-29 04:39:15,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 42.91304347826087) internal successors, (987), 23 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:15,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 61.0) internal successors, (1464), 24 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:15,467 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 61.0) internal successors, (1464), 24 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:15,467 INFO L175 Difference]: Start difference. First operand has 217 places, 363 transitions, 4091 flow. Second operand 23 states and 987 transitions. [2023-11-29 04:39:15,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 942 transitions, 12246 flow [2023-11-29 04:39:16,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 942 transitions, 11668 flow, removed 179 selfloop flow, removed 5 redundant places. [2023-11-29 04:39:16,042 INFO L231 Difference]: Finished difference. Result has 253 places, 733 transitions, 9966 flow [2023-11-29 04:39:16,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=3691, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9966, PETRI_PLACES=253, PETRI_TRANSITIONS=733} [2023-11-29 04:39:16,043 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 193 predicate places. [2023-11-29 04:39:16,043 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 733 transitions, 9966 flow [2023-11-29 04:39:16,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 33.75) internal successors, (405), 12 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:16,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:16,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:16,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-11-29 04:39:16,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:39:16,244 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:39:16,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:16,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1387599258, now seen corresponding path program 3 times [2023-11-29 04:39:16,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:16,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154883064] [2023-11-29 04:39:16,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:39:16,245 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 [2023-11-29 04:39:16,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:16,246 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:39:16,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-29 04:39:16,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:39:16,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:16,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:39:16,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:16,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:16,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:16,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154883064] [2023-11-29 04:39:16,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154883064] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:39:16,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:39:16,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2023-11-29 04:39:16,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634143374] [2023-11-29 04:39:16,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:16,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 04:39:16,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:16,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 04:39:16,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:39:16,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 61 [2023-11-29 04:39:16,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 733 transitions, 9966 flow. Second operand has 12 states, 12 states have (on average 33.833333333333336) internal successors, (406), 12 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:16,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:16,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 61 [2023-11-29 04:39:16,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:23,452 INFO L124 PetriNetUnfolderBase]: 7061/13405 cut-off events. [2023-11-29 04:39:23,452 INFO L125 PetriNetUnfolderBase]: For 142667/142677 co-relation queries the response was YES. [2023-11-29 04:39:23,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78674 conditions, 13405 events. 7061/13405 cut-off events. For 142667/142677 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 111781 event pairs, 1840 based on Foata normal form. 54/13459 useless extension candidates. Maximal degree in co-relation 78575. Up to 6622 conditions per place. [2023-11-29 04:39:23,679 INFO L140 encePairwiseOnDemand]: 45/61 looper letters, 710 selfloop transitions, 587 changer transitions 7/1311 dead transitions. [2023-11-29 04:39:23,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 1311 transitions, 21070 flow [2023-11-29 04:39:23,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 04:39:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 04:39:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 703 transitions. [2023-11-29 04:39:23,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6779170684667309 [2023-11-29 04:39:23,682 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 703 transitions. [2023-11-29 04:39:23,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 703 transitions. [2023-11-29 04:39:23,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:23,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 703 transitions. [2023-11-29 04:39:23,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 41.35294117647059) internal successors, (703), 17 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:23,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 61.0) internal successors, (1098), 18 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:23,685 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 61.0) internal successors, (1098), 18 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:23,685 INFO L175 Difference]: Start difference. First operand has 253 places, 733 transitions, 9966 flow. Second operand 17 states and 703 transitions. [2023-11-29 04:39:23,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 1311 transitions, 21070 flow [2023-11-29 04:39:25,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 1311 transitions, 18458 flow, removed 1303 selfloop flow, removed 1 redundant places. [2023-11-29 04:39:25,834 INFO L231 Difference]: Finished difference. Result has 279 places, 1114 transitions, 16328 flow [2023-11-29 04:39:25,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=8540, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=16328, PETRI_PLACES=279, PETRI_TRANSITIONS=1114} [2023-11-29 04:39:25,835 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 219 predicate places. [2023-11-29 04:39:25,835 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 1114 transitions, 16328 flow [2023-11-29 04:39:25,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 33.833333333333336) internal successors, (406), 12 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:25,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:25,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:25,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2023-11-29 04:39:26,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:39:26,036 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:39:26,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:26,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1100802172, now seen corresponding path program 4 times [2023-11-29 04:39:26,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:26,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234787506] [2023-11-29 04:39:26,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:39:26,037 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 [2023-11-29 04:39:26,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:26,038 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:39:26,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-11-29 04:39:26,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:39:26,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:26,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:39:26,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:26,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:26,498 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:26,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234787506] [2023-11-29 04:39:26,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234787506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:39:26,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:39:26,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-29 04:39:26,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056721740] [2023-11-29 04:39:26,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:26,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:39:26,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:26,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:39:26,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:39:26,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 61 [2023-11-29 04:39:26,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 1114 transitions, 16328 flow. Second operand has 14 states, 14 states have (on average 33.357142857142854) internal successors, (467), 14 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:26,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:26,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 61 [2023-11-29 04:39:26,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:40,201 INFO L124 PetriNetUnfolderBase]: 11399/22481 cut-off events. [2023-11-29 04:39:40,202 INFO L125 PetriNetUnfolderBase]: For 235532/235604 co-relation queries the response was YES. [2023-11-29 04:39:40,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131260 conditions, 22481 events. 11399/22481 cut-off events. For 235532/235604 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 211201 event pairs, 2060 based on Foata normal form. 130/22611 useless extension candidates. Maximal degree in co-relation 131151. Up to 7441 conditions per place. [2023-11-29 04:39:40,689 INFO L140 encePairwiseOnDemand]: 45/61 looper letters, 839 selfloop transitions, 1492 changer transitions 2/2340 dead transitions. [2023-11-29 04:39:40,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 2340 transitions, 38297 flow [2023-11-29 04:39:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 04:39:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 04:39:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1406 transitions. [2023-11-29 04:39:40,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6779170684667309 [2023-11-29 04:39:40,693 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1406 transitions. [2023-11-29 04:39:40,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1406 transitions. [2023-11-29 04:39:40,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:40,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1406 transitions. [2023-11-29 04:39:40,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 41.35294117647059) internal successors, (1406), 34 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:40,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 61.0) internal successors, (2135), 35 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:40,700 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 61.0) internal successors, (2135), 35 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:40,700 INFO L175 Difference]: Start difference. First operand has 279 places, 1114 transitions, 16328 flow. Second operand 34 states and 1406 transitions. [2023-11-29 04:39:40,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 2340 transitions, 38297 flow [2023-11-29 04:39:44,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 2340 transitions, 37027 flow, removed 532 selfloop flow, removed 6 redundant places. [2023-11-29 04:39:44,872 INFO L231 Difference]: Finished difference. Result has 323 places, 2097 transitions, 36200 flow [2023-11-29 04:39:44,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=15542, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=702, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=36200, PETRI_PLACES=323, PETRI_TRANSITIONS=2097} [2023-11-29 04:39:44,874 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 263 predicate places. [2023-11-29 04:39:44,874 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 2097 transitions, 36200 flow [2023-11-29 04:39:44,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 33.357142857142854) internal successors, (467), 14 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:44,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:44,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:44,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2023-11-29 04:39:45,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:39:45,075 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:39:45,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:45,076 INFO L85 PathProgramCache]: Analyzing trace with hash 780086420, now seen corresponding path program 5 times [2023-11-29 04:39:45,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:45,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464944065] [2023-11-29 04:39:45,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:39:45,076 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 [2023-11-29 04:39:45,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:45,077 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:39:45,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-11-29 04:39:45,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:39:45,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:45,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:39:45,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:45,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:39:45,412 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:45,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464944065] [2023-11-29 04:39:45,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464944065] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:39:45,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:39:45,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 04:39:45,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426139053] [2023-11-29 04:39:45,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:45,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 04:39:45,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:45,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 04:39:45,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:39:45,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 61 [2023-11-29 04:39:45,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 2097 transitions, 36200 flow. Second operand has 12 states, 12 states have (on average 33.75) internal successors, (405), 12 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:39:45,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:45,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 61 [2023-11-29 04:39:45,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:40:04,483 INFO L124 PetriNetUnfolderBase]: 14072/27324 cut-off events. [2023-11-29 04:40:04,483 INFO L125 PetriNetUnfolderBase]: For 356224/356242 co-relation queries the response was YES. [2023-11-29 04:40:04,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181930 conditions, 27324 events. 14072/27324 cut-off events. For 356224/356242 co-relation queries the response was YES. Maximal size of possible extension queue 1377. Compared 259856 event pairs, 3649 based on Foata normal form. 474/27798 useless extension candidates. Maximal degree in co-relation 181807. Up to 13432 conditions per place. [2023-11-29 04:40:05,107 INFO L140 encePairwiseOnDemand]: 46/61 looper letters, 1664 selfloop transitions, 1465 changer transitions 0/3136 dead transitions. [2023-11-29 04:40:05,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 3136 transitions, 60371 flow [2023-11-29 04:40:05,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 04:40:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 04:40:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1451 transitions. [2023-11-29 04:40:05,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.642888790429774 [2023-11-29 04:40:05,110 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1451 transitions. [2023-11-29 04:40:05,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1451 transitions. [2023-11-29 04:40:05,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:40:05,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1451 transitions. [2023-11-29 04:40:05,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 39.21621621621622) internal successors, (1451), 37 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:40:05,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 61.0) internal successors, (2318), 38 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:40:05,114 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 61.0) internal successors, (2318), 38 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:40:05,115 INFO L175 Difference]: Start difference. First operand has 323 places, 2097 transitions, 36200 flow. Second operand 37 states and 1451 transitions. [2023-11-29 04:40:05,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 3136 transitions, 60371 flow [2023-11-29 04:40:15,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 3136 transitions, 57564 flow, removed 1300 selfloop flow, removed 3 redundant places. [2023-11-29 04:40:15,953 INFO L231 Difference]: Finished difference. Result has 379 places, 2791 transitions, 52885 flow [2023-11-29 04:40:15,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=33766, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=788, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1077, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=52885, PETRI_PLACES=379, PETRI_TRANSITIONS=2791} [2023-11-29 04:40:15,955 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 319 predicate places. [2023-11-29 04:40:15,955 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 2791 transitions, 52885 flow [2023-11-29 04:40:15,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 33.75) internal successors, (405), 12 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:40:15,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:40:15,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:40:15,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-11-29 04:40:16,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:40:16,156 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:40:16,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:40:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash -580498157, now seen corresponding path program 1 times [2023-11-29 04:40:16,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:40:16,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338327218] [2023-11-29 04:40:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:40:16,157 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 [2023-11-29 04:40:16,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:40:16,157 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:40:16,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-11-29 04:40:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:16,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:40:16,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:40:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:40:16,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:40:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:40:16,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:40:16,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338327218] [2023-11-29 04:40:16,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338327218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:40:16,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:40:16,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-29 04:40:16,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711033260] [2023-11-29 04:40:16,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:40:16,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:40:16,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:40:16,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:40:16,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:40:16,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 61 [2023-11-29 04:40:16,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 2791 transitions, 52885 flow. Second operand has 14 states, 14 states have (on average 34.214285714285715) internal successors, (479), 14 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:40:16,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:40:16,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 61 [2023-11-29 04:40:16,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:41:02,152 INFO L124 PetriNetUnfolderBase]: 27186/52818 cut-off events. [2023-11-29 04:41:02,152 INFO L125 PetriNetUnfolderBase]: For 840813/840866 co-relation queries the response was YES. [2023-11-29 04:41:03,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377875 conditions, 52818 events. 27186/52818 cut-off events. For 840813/840866 co-relation queries the response was YES. Maximal size of possible extension queue 2032. Compared 536500 event pairs, 1244 based on Foata normal form. 553/53368 useless extension candidates. Maximal degree in co-relation 377729. Up to 9766 conditions per place. [2023-11-29 04:41:03,879 INFO L140 encePairwiseOnDemand]: 48/61 looper letters, 2125 selfloop transitions, 4943 changer transitions 6/7149 dead transitions. [2023-11-29 04:41:03,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 7149 transitions, 151837 flow [2023-11-29 04:41:03,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 04:41:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 04:41:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1824 transitions. [2023-11-29 04:41:03,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6500356379187455 [2023-11-29 04:41:03,881 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1824 transitions. [2023-11-29 04:41:03,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1824 transitions. [2023-11-29 04:41:03,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:41:03,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1824 transitions. [2023-11-29 04:41:03,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 39.65217391304348) internal successors, (1824), 46 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:41:03,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 61.0) internal successors, (2867), 47 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:41:03,887 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 61.0) internal successors, (2867), 47 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:41:03,887 INFO L175 Difference]: Start difference. First operand has 379 places, 2791 transitions, 52885 flow. Second operand 46 states and 1824 transitions. [2023-11-29 04:41:03,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 7149 transitions, 151837 flow [2023-11-29 04:41:38,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 7149 transitions, 148963 flow, removed 1418 selfloop flow, removed 2 redundant places. [2023-11-29 04:41:38,309 INFO L231 Difference]: Finished difference. Result has 448 places, 6167 transitions, 136444 flow [2023-11-29 04:41:38,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=51035, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2031, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=136444, PETRI_PLACES=448, PETRI_TRANSITIONS=6167} [2023-11-29 04:41:38,311 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 388 predicate places. [2023-11-29 04:41:38,311 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 6167 transitions, 136444 flow [2023-11-29 04:41:38,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.214285714285715) internal successors, (479), 14 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:41:38,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:41:38,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:41:38,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2023-11-29 04:41:38,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:41:38,512 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:41:38,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:41:38,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1116237547, now seen corresponding path program 2 times [2023-11-29 04:41:38,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:41:38,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045022323] [2023-11-29 04:41:38,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:41:38,513 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 [2023-11-29 04:41:38,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:41:38,514 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:41:38,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-11-29 04:41:38,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:41:38,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:41:38,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:41:38,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:41:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:41:38,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:41:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:41:38,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:41:38,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045022323] [2023-11-29 04:41:38,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045022323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:41:38,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:41:38,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-29 04:41:38,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590342012] [2023-11-29 04:41:38,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:41:38,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:41:38,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:41:38,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:41:38,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:41:38,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 61 [2023-11-29 04:41:38,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 6167 transitions, 136444 flow. Second operand has 14 states, 14 states have (on average 33.285714285714285) internal successors, (466), 14 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:41:38,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:41:38,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 61 [2023-11-29 04:41:38,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:43:28,177 INFO L124 PetriNetUnfolderBase]: 28046/54335 cut-off events. [2023-11-29 04:43:28,177 INFO L125 PetriNetUnfolderBase]: For 1076267/1076267 co-relation queries the response was YES. [2023-11-29 04:43:29,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428041 conditions, 54335 events. 28046/54335 cut-off events. For 1076267/1076267 co-relation queries the response was YES. Maximal size of possible extension queue 2104. Compared 554554 event pairs, 5704 based on Foata normal form. 27/54362 useless extension candidates. Maximal degree in co-relation 427869. Up to 20257 conditions per place. [2023-11-29 04:43:30,002 INFO L140 encePairwiseOnDemand]: 50/61 looper letters, 4589 selfloop transitions, 2124 changer transitions 1/6721 dead transitions. [2023-11-29 04:43:30,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 6721 transitions, 161602 flow [2023-11-29 04:43:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 04:43:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 04:43:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 919 transitions. [2023-11-29 04:43:30,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277322404371585 [2023-11-29 04:43:30,005 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 919 transitions. [2023-11-29 04:43:30,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 919 transitions. [2023-11-29 04:43:30,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:43:30,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 919 transitions. [2023-11-29 04:43:30,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 38.291666666666664) internal successors, (919), 24 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:30,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 61.0) internal successors, (1525), 25 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:30,008 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 61.0) internal successors, (1525), 25 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:30,008 INFO L175 Difference]: Start difference. First operand has 448 places, 6167 transitions, 136444 flow. Second operand 24 states and 919 transitions. [2023-11-29 04:43:30,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 6721 transitions, 161602 flow [2023-11-29 04:44:27,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 6721 transitions, 155405 flow, removed 2623 selfloop flow, removed 10 redundant places. [2023-11-29 04:44:27,287 INFO L231 Difference]: Finished difference. Result has 468 places, 6295 transitions, 138697 flow [2023-11-29 04:44:27,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=131374, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1999, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=138697, PETRI_PLACES=468, PETRI_TRANSITIONS=6295} [2023-11-29 04:44:27,292 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 408 predicate places. [2023-11-29 04:44:27,292 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 6295 transitions, 138697 flow [2023-11-29 04:44:27,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 33.285714285714285) internal successors, (466), 14 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:44:27,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:44:27,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:44:27,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2023-11-29 04:44:27,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:44:27,493 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:44:27,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:44:27,493 INFO L85 PathProgramCache]: Analyzing trace with hash -487825183, now seen corresponding path program 3 times [2023-11-29 04:44:27,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:44:27,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138454138] [2023-11-29 04:44:27,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:44:27,494 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 [2023-11-29 04:44:27,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:44:27,494 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:44:27,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-11-29 04:44:27,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:44:27,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:44:27,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:44:27,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:44:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:44:27,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:44:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:44:27,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:44:27,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138454138] [2023-11-29 04:44:27,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138454138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:44:27,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:44:27,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-29 04:44:27,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319642165] [2023-11-29 04:44:27,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:44:27,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:44:27,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:44:27,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:44:27,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:44:28,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 61 [2023-11-29 04:44:28,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 6295 transitions, 138697 flow. Second operand has 14 states, 14 states have (on average 34.142857142857146) internal successors, (478), 14 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:44:28,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:44:28,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 61 [2023-11-29 04:44:28,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:46:33,417 INFO L124 PetriNetUnfolderBase]: 31171/60347 cut-off events. [2023-11-29 04:46:33,417 INFO L125 PetriNetUnfolderBase]: For 1237277/1237337 co-relation queries the response was YES. [2023-11-29 04:46:35,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484542 conditions, 60347 events. 31171/60347 cut-off events. For 1237277/1237337 co-relation queries the response was YES. Maximal size of possible extension queue 2393. Compared 623194 event pairs, 2358 based on Foata normal form. 446/60793 useless extension candidates. Maximal degree in co-relation 484364. Up to 11263 conditions per place. [2023-11-29 04:46:35,965 INFO L140 encePairwiseOnDemand]: 47/61 looper letters, 2395 selfloop transitions, 6087 changer transitions 0/8557 dead transitions. [2023-11-29 04:46:35,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 8557 transitions, 204342 flow [2023-11-29 04:46:35,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 04:46:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-29 04:46:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 1670 transitions. [2023-11-29 04:46:35,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6844262295081968 [2023-11-29 04:46:35,968 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 1670 transitions. [2023-11-29 04:46:35,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 1670 transitions. [2023-11-29 04:46:35,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:46:35,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 1670 transitions. [2023-11-29 04:46:35,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 41.75) internal successors, (1670), 40 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:35,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 61.0) internal successors, (2501), 41 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:35,974 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 61.0) internal successors, (2501), 41 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:35,974 INFO L175 Difference]: Start difference. First operand has 468 places, 6295 transitions, 138697 flow. Second operand 40 states and 1670 transitions. [2023-11-29 04:46:35,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 8557 transitions, 204342 flow [2023-11-29 04:47:57,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 8557 transitions, 203393 flow, removed 428 selfloop flow, removed 3 redundant places. [2023-11-29 04:47:57,650 INFO L231 Difference]: Finished difference. Result has 526 places, 7382 transitions, 183389 flow [2023-11-29 04:47:57,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=138122, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5025, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1089, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=183389, PETRI_PLACES=526, PETRI_TRANSITIONS=7382} [2023-11-29 04:47:57,655 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 466 predicate places. [2023-11-29 04:47:57,655 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 7382 transitions, 183389 flow [2023-11-29 04:47:57,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.142857142857146) internal successors, (478), 14 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:47:57,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:47:57,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:47:57,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2023-11-29 04:47:57,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:47:57,857 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 04:47:57,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:47:57,857 INFO L85 PathProgramCache]: Analyzing trace with hash 896243859, now seen corresponding path program 4 times [2023-11-29 04:47:57,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:47:57,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577814256] [2023-11-29 04:47:57,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:47:57,858 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 [2023-11-29 04:47:57,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:47:57,859 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 04:47:57,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab48bcc8-9b60-43d5-968c-8ed149db304e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-11-29 04:47:57,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:47:57,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:47:57,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:47:57,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:47:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:47:58,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:47:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:47:58,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:47:58,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577814256] [2023-11-29 04:47:58,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577814256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:47:58,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:47:58,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-29 04:47:58,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813090617] [2023-11-29 04:47:58,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:47:58,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:47:58,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:47:58,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:47:58,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:47:58,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 61 [2023-11-29 04:47:58,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 7382 transitions, 183389 flow. Second operand has 14 states, 14 states have (on average 33.42857142857143) internal successors, (468), 14 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:47:58,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:47:58,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 61 [2023-11-29 04:47:58,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:54,914 INFO L124 PetriNetUnfolderBase]: 32225/61823 cut-off events. [2023-11-29 04:50:54,914 INFO L125 PetriNetUnfolderBase]: For 1499452/1499476 co-relation queries the response was YES. [2023-11-29 04:50:57,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535129 conditions, 61823 events. 32225/61823 cut-off events. For 1499452/1499476 co-relation queries the response was YES. Maximal size of possible extension queue 2464. Compared 636502 event pairs, 6966 based on Foata normal form. 54/61877 useless extension candidates. Maximal degree in co-relation 534930. Up to 23856 conditions per place. [2023-11-29 04:50:57,687 INFO L140 encePairwiseOnDemand]: 49/61 looper letters, 5059 selfloop transitions, 2732 changer transitions 0/7798 dead transitions. [2023-11-29 04:50:57,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 7798 transitions, 207551 flow [2023-11-29 04:50:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 04:50:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 04:50:57,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1140 transitions. [2023-11-29 04:50:57,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6229508196721312 [2023-11-29 04:50:57,690 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1140 transitions. [2023-11-29 04:50:57,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1140 transitions. [2023-11-29 04:50:57,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:57,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1140 transitions. [2023-11-29 04:50:57,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 38.0) internal successors, (1140), 30 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:57,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 61.0) internal successors, (1891), 31 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:57,695 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 61.0) internal successors, (1891), 31 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:57,695 INFO L175 Difference]: Start difference. First operand has 526 places, 7382 transitions, 183389 flow. Second operand 30 states and 1140 transitions. [2023-11-29 04:50:57,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 7798 transitions, 207551 flow