./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx --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 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:19:51,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:19:52,092 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:19:52,104 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:19:52,105 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:19:52,148 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:19:52,149 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:19:52,149 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:19:52,150 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:19:52,151 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:19:52,152 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:19:52,152 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:19:52,153 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:19:52,153 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:19:52,154 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:19:52,155 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:19:52,155 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:19:52,156 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:19:52,156 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:19:52,157 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:19:52,157 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:19:52,158 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:19:52,158 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:19:52,159 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:19:52,159 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:19:52,159 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:19:52,160 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:19:52,160 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:19:52,161 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:19:52,161 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:19:52,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:19:52,162 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:19:52,163 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:19:52,163 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:19:52,164 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:19:52,164 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:19:52,165 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:19:52,165 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:19:52,165 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:19:52,166 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_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 [2023-11-21 22:19:52,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:19:52,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:19:52,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:19:52,534 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:19:52,535 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:19:52,536 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2023-11-21 22:19:55,659 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:19:55,902 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:19:55,902 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2023-11-21 22:19:55,912 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/data/eccda9afa/13ae4dec494c453a8085aa2a59e63139/FLAG50b83fa04 [2023-11-21 22:19:55,927 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/data/eccda9afa/13ae4dec494c453a8085aa2a59e63139 [2023-11-21 22:19:55,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:19:55,932 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:19:55,933 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:19:55,933 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:19:55,939 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:19:55,940 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:19:55" (1/1) ... [2023-11-21 22:19:55,941 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37c29741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:55, skipping insertion in model container [2023-11-21 22:19:55,941 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:19:55" (1/1) ... [2023-11-21 22:19:55,971 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:19:56,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:19:56,354 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) [2023-11-21 22:19:56,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3c7198c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:56, skipping insertion in model container [2023-11-21 22:19:56,355 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:19:56,355 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-21 22:19:56,357 INFO L158 Benchmark]: Toolchain (without parser) took 424.72ms. Allocated memory is still 151.0MB. Free memory was 111.2MB in the beginning and 117.0MB in the end (delta: -5.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-21 22:19:56,358 INFO L158 Benchmark]: CDTParser took 0.48ms. Allocated memory is still 121.6MB. Free memory is still 89.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:19:56,359 INFO L158 Benchmark]: CACSL2BoogieTranslator took 422.21ms. Allocated memory is still 151.0MB. Free memory was 111.2MB in the beginning and 117.0MB in the end (delta: -5.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-21 22:19:56,360 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48ms. Allocated memory is still 121.6MB. Free memory is still 89.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 422.21ms. Allocated memory is still 151.0MB. Free memory was 111.2MB in the beginning and 117.0MB in the end (delta: -5.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx --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 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:19:58,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:19:59,014 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-21 22:19:59,023 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:19:59,024 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:19:59,070 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:19:59,071 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:19:59,072 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:19:59,073 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:19:59,078 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:19:59,079 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:19:59,079 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:19:59,080 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:19:59,082 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:19:59,082 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:19:59,083 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:19:59,083 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:19:59,084 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:19:59,084 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:19:59,085 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:19:59,086 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:19:59,086 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:19:59,087 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:19:59,087 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 22:19:59,088 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 22:19:59,088 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:19:59,088 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:19:59,089 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:19:59,090 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:19:59,090 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:19:59,092 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:19:59,092 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:19:59,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:19:59,093 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:19:59,093 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:19:59,093 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-21 22:19:59,094 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 22:19:59,094 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:19:59,094 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:19:59,095 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:19:59,096 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:19:59,096 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-21 22:19:59,096 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_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 [2023-11-21 22:19:59,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:19:59,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:19:59,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:19:59,533 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:19:59,534 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:19:59,535 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2023-11-21 22:20:02,673 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:20:02,993 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:20:02,993 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2023-11-21 22:20:03,017 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/data/1261cd2b9/2af9a44ce7874549aec5afbb342037e0/FLAGeb544841f [2023-11-21 22:20:03,036 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/data/1261cd2b9/2af9a44ce7874549aec5afbb342037e0 [2023-11-21 22:20:03,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:20:03,044 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:20:03,047 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:20:03,047 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:20:03,052 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:20:03,053 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:20:03" (1/1) ... [2023-11-21 22:20:03,054 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef676e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:03, skipping insertion in model container [2023-11-21 22:20:03,055 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:20:03" (1/1) ... [2023-11-21 22:20:03,101 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:20:03,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:20:03,414 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-21 22:20:03,427 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:20:03,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:20:03,489 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:20:03,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:20:03,571 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:20:03,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:03 WrapperNode [2023-11-21 22:20:03,572 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:20:03,573 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:20:03,573 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:20:03,574 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:20:03,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:03" (1/1) ... [2023-11-21 22:20:03,596 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:03" (1/1) ... [2023-11-21 22:20:03,645 INFO L138 Inliner]: procedures = 29, calls = 67, calls flagged for inlining = 23, calls inlined = 35, statements flattened = 423 [2023-11-21 22:20:03,645 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:20:03,646 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:20:03,674 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:20:03,674 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:20:03,684 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:03" (1/1) ... [2023-11-21 22:20:03,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:03" (1/1) ... [2023-11-21 22:20:03,717 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:03" (1/1) ... [2023-11-21 22:20:03,732 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:03" (1/1) ... [2023-11-21 22:20:03,786 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:03" (1/1) ... [2023-11-21 22:20:03,793 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:03" (1/1) ... [2023-11-21 22:20:03,797 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:03" (1/1) ... [2023-11-21 22:20:03,800 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:03" (1/1) ... [2023-11-21 22:20:03,807 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:20:03,808 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:20:03,808 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:20:03,808 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:20:03,809 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:03" (1/1) ... [2023-11-21 22:20:03,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:20:03,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:20:03,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:20:03,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:20:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:20:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-11-21 22:20:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-21 22:20:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:20:03,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-21 22:20:03,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-21 22:20:03,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-21 22:20:03,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-21 22:20:03,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-21 22:20:03,909 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-21 22:20:03,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-21 22:20:03,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:20:03,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:20:03,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:20:03,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-11-21 22:20:03,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:20:03,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-21 22:20:03,914 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:20:04,082 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:20:04,086 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:20:05,487 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:20:06,219 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:20:06,219 INFO L308 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-21 22:20:06,221 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:20:06 BoogieIcfgContainer [2023-11-21 22:20:06,221 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:20:06,223 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:20:06,225 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:20:06,228 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:20:06,228 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:20:03" (1/3) ... [2023-11-21 22:20:06,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560bbfa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:20:06, skipping insertion in model container [2023-11-21 22:20:06,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:03" (2/3) ... [2023-11-21 22:20:06,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560bbfa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:20:06, skipping insertion in model container [2023-11-21 22:20:06,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:20:06" (3/3) ... [2023-11-21 22:20:06,233 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-subst.wvr.c [2023-11-21 22:20:06,253 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:20:06,253 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2023-11-21 22:20:06,253 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:20:06,384 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-21 22:20:06,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 140 transitions, 301 flow [2023-11-21 22:20:06,482 INFO L124 PetriNetUnfolderBase]: 12/137 cut-off events. [2023-11-21 22:20:06,483 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-21 22:20:06,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 137 events. 12/137 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 459 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 96. Up to 2 conditions per place. [2023-11-21 22:20:06,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 140 transitions, 301 flow [2023-11-21 22:20:06,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 136 transitions, 290 flow [2023-11-21 22:20:06,507 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:20:06,514 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;@73b5f2f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:20:06,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2023-11-21 22:20:06,518 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:20:06,519 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-21 22:20:06,519 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:20:06,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:06,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:20:06,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:20:06,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:06,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1317921, now seen corresponding path program 1 times [2023-11-21 22:20:06,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:06,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018250820] [2023-11-21 22:20:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:06,539 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 [2023-11-21 22:20:06,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:06,546 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:20:06,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:20:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:06,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:20:06,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:06,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:20:06,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:06,815 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 [2023-11-21 22:20:06,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:06,828 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 [2023-11-21 22:20:06,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:06,835 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 [2023-11-21 22:20:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:06,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 22:20:06,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:06,871 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 [2023-11-21 22:20:06,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:06,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 22:20:06,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:06,922 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 [2023-11-21 22:20:06,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:06,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 22:20:06,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:06,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 22:20:07,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:07,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 22:20:07,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:07,032 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 [2023-11-21 22:20:07,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:07,047 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 11 treesize of output 1 [2023-11-21 22:20:07,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:07,054 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 [2023-11-21 22:20:07,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:07,062 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 [2023-11-21 22:20:07,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:07,071 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 [2023-11-21 22:20:07,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:07,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 22:20:07,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:07,105 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 [2023-11-21 22:20:07,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:07,117 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 [2023-11-21 22:20:07,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:07,123 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 [2023-11-21 22:20:07,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:07,137 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 [2023-11-21 22:20:07,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:07,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 22:20:07,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:07,163 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 [2023-11-21 22:20:07,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:07,175 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 [2023-11-21 22:20:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:07,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:07,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:07,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018250820] [2023-11-21 22:20:07,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018250820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:07,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:07,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:20:07,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013372939] [2023-11-21 22:20:07,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:07,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:20:07,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:07,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:20:07,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:20:07,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 140 [2023-11-21 22:20:07,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 136 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:07,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:07,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 140 [2023-11-21 22:20:07,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:08,814 INFO L124 PetriNetUnfolderBase]: 2179/5080 cut-off events. [2023-11-21 22:20:08,814 INFO L125 PetriNetUnfolderBase]: For 193/201 co-relation queries the response was YES. [2023-11-21 22:20:08,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8150 conditions, 5080 events. 2179/5080 cut-off events. For 193/201 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 42406 event pairs, 1382 based on Foata normal form. 1/3816 useless extension candidates. Maximal degree in co-relation 7429. Up to 2910 conditions per place. [2023-11-21 22:20:08,890 INFO L140 encePairwiseOnDemand]: 134/140 looper letters, 48 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2023-11-21 22:20:08,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 131 transitions, 380 flow [2023-11-21 22:20:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:20:08,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:20:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-11-21 22:20:08,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7357142857142858 [2023-11-21 22:20:08,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-11-21 22:20:08,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-11-21 22:20:08,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:08,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-11-21 22:20:08,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:08,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:08,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:08,925 INFO L175 Difference]: Start difference. First operand has 134 places, 136 transitions, 290 flow. Second operand 3 states and 309 transitions. [2023-11-21 22:20:08,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 131 transitions, 380 flow [2023-11-21 22:20:08,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 131 transitions, 368 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-21 22:20:08,937 INFO L231 Difference]: Finished difference. Result has 125 places, 131 transitions, 272 flow [2023-11-21 22:20:08,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=125, PETRI_TRANSITIONS=131} [2023-11-21 22:20:08,943 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, -9 predicate places. [2023-11-21 22:20:08,944 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 131 transitions, 272 flow [2023-11-21 22:20:08,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:08,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:08,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:20:08,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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)] Ended with exit code 0 [2023-11-21 22:20:09,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:09,155 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:20:09,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:09,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1317922, now seen corresponding path program 1 times [2023-11-21 22:20:09,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:09,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042690709] [2023-11-21 22:20:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:09,157 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 [2023-11-21 22:20:09,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:09,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:20:09,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:20:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:09,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 22:20:09,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:09,348 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 [2023-11-21 22:20:09,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,361 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 [2023-11-21 22:20:09,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,376 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 [2023-11-21 22:20:09,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,385 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 [2023-11-21 22:20:09,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,412 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 [2023-11-21 22:20:09,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,425 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 [2023-11-21 22:20:09,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,459 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 [2023-11-21 22:20:09,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,472 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 [2023-11-21 22:20:09,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,503 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 [2023-11-21 22:20:09,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-21 22:20:09,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,559 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 [2023-11-21 22:20:09,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,584 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 [2023-11-21 22:20:09,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,604 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 [2023-11-21 22:20:09,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,613 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 [2023-11-21 22:20:09,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,625 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 [2023-11-21 22:20:09,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,637 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 [2023-11-21 22:20:09,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,665 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 [2023-11-21 22:20:09,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:20:09,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,696 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 [2023-11-21 22:20:09,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,705 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 [2023-11-21 22:20:09,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,732 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 [2023-11-21 22:20:09,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:20:09,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,757 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 [2023-11-21 22:20:09,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:09,769 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 [2023-11-21 22:20:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:09,862 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:09,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:09,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042690709] [2023-11-21 22:20:09,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042690709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:09,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:09,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:20:09,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307502262] [2023-11-21 22:20:09,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:09,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:20:09,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:09,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:20:09,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:20:10,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 140 [2023-11-21 22:20:10,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 131 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 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) [2023-11-21 22:20:10,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:10,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 140 [2023-11-21 22:20:10,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:11,739 INFO L124 PetriNetUnfolderBase]: 2181/5088 cut-off events. [2023-11-21 22:20:11,739 INFO L125 PetriNetUnfolderBase]: For 47/55 co-relation queries the response was YES. [2023-11-21 22:20:11,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8071 conditions, 5088 events. 2181/5088 cut-off events. For 47/55 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 42421 event pairs, 1382 based on Foata normal form. 0/3820 useless extension candidates. Maximal degree in co-relation 8023. Up to 2923 conditions per place. [2023-11-21 22:20:11,809 INFO L140 encePairwiseOnDemand]: 128/140 looper letters, 52 selfloop transitions, 9 changer transitions 0/139 dead transitions. [2023-11-21 22:20:11,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 139 transitions, 412 flow [2023-11-21 22:20:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:20:11,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:20:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 405 transitions. [2023-11-21 22:20:11,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7232142857142857 [2023-11-21 22:20:11,814 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 405 transitions. [2023-11-21 22:20:11,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 405 transitions. [2023-11-21 22:20:11,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:11,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 405 transitions. [2023-11-21 22:20:11,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.25) internal successors, (405), 4 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) [2023-11-21 22:20:11,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:11,821 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:11,821 INFO L175 Difference]: Start difference. First operand has 125 places, 131 transitions, 272 flow. Second operand 4 states and 405 transitions. [2023-11-21 22:20:11,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 139 transitions, 412 flow [2023-11-21 22:20:11,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 139 transitions, 406 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:20:11,826 INFO L231 Difference]: Finished difference. Result has 129 places, 138 transitions, 338 flow [2023-11-21 22:20:11,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=338, PETRI_PLACES=129, PETRI_TRANSITIONS=138} [2023-11-21 22:20:11,828 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, -5 predicate places. [2023-11-21 22:20:11,828 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 138 transitions, 338 flow [2023-11-21 22:20:11,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 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) [2023-11-21 22:20:11,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:11,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-21 22:20:11,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:12,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:12,031 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:20:12,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:12,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1266565717, now seen corresponding path program 1 times [2023-11-21 22:20:12,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:12,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024048958] [2023-11-21 22:20:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:12,033 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 [2023-11-21 22:20:12,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:12,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:20:12,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:20:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:12,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:20:12,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:12,157 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 [2023-11-21 22:20:12,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,182 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 [2023-11-21 22:20:12,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,192 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 [2023-11-21 22:20:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,204 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 [2023-11-21 22:20:12,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 22:20:12,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,224 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 [2023-11-21 22:20:12,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,248 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 [2023-11-21 22:20:12,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,260 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 [2023-11-21 22:20:12,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,272 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 [2023-11-21 22:20:12,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,280 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 [2023-11-21 22:20:12,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,289 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 [2023-11-21 22:20:12,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,300 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 [2023-11-21 22:20:12,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,325 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 [2023-11-21 22:20:12,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,337 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 [2023-11-21 22:20:12,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,352 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 [2023-11-21 22:20:12,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,367 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 [2023-11-21 22:20:12,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,376 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 [2023-11-21 22:20:12,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,394 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 [2023-11-21 22:20:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-21 22:20:12,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,459 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 [2023-11-21 22:20:12,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,483 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 [2023-11-21 22:20:12,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,496 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 [2023-11-21 22:20:12,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,512 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 [2023-11-21 22:20:12,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,532 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 [2023-11-21 22:20:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:12,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:20:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:13,113 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:13,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024048958] [2023-11-21 22:20:13,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024048958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:20:13,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:20:13,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-21 22:20:13,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589648191] [2023-11-21 22:20:13,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:20:13,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:20:13,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:20:13,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:20:15,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 140 [2023-11-21 22:20:15,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 138 transitions, 338 flow. Second operand has 10 states, 10 states have (on average 86.0) internal successors, (860), 10 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:15,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:15,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 140 [2023-11-21 22:20:15,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:19,092 INFO L124 PetriNetUnfolderBase]: 2190/5115 cut-off events. [2023-11-21 22:20:19,092 INFO L125 PetriNetUnfolderBase]: For 55/63 co-relation queries the response was YES. [2023-11-21 22:20:19,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8182 conditions, 5115 events. 2190/5115 cut-off events. For 55/63 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 42542 event pairs, 1382 based on Foata normal form. 0/3846 useless extension candidates. Maximal degree in co-relation 8036. Up to 2926 conditions per place. [2023-11-21 22:20:19,154 INFO L140 encePairwiseOnDemand]: 127/140 looper letters, 52 selfloop transitions, 36 changer transitions 0/166 dead transitions. [2023-11-21 22:20:19,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 166 transitions, 630 flow [2023-11-21 22:20:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:20:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-21 22:20:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 947 transitions. [2023-11-21 22:20:19,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6764285714285714 [2023-11-21 22:20:19,162 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 947 transitions. [2023-11-21 22:20:19,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 947 transitions. [2023-11-21 22:20:19,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:19,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 947 transitions. [2023-11-21 22:20:19,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.7) internal successors, (947), 10 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:19,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 140.0) internal successors, (1540), 11 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:19,177 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 140.0) internal successors, (1540), 11 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:19,178 INFO L175 Difference]: Start difference. First operand has 129 places, 138 transitions, 338 flow. Second operand 10 states and 947 transitions. [2023-11-21 22:20:19,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 166 transitions, 630 flow [2023-11-21 22:20:19,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 166 transitions, 630 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 22:20:19,188 INFO L231 Difference]: Finished difference. Result has 141 places, 166 transitions, 578 flow [2023-11-21 22:20:19,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=578, PETRI_PLACES=141, PETRI_TRANSITIONS=166} [2023-11-21 22:20:19,189 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, 7 predicate places. [2023-11-21 22:20:19,190 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 166 transitions, 578 flow [2023-11-21 22:20:19,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 86.0) internal successors, (860), 10 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:19,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:19,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:19,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:20:19,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:19,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:20:19,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash 972819537, now seen corresponding path program 1 times [2023-11-21 22:20:19,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:19,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916520042] [2023-11-21 22:20:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:19,395 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 [2023-11-21 22:20:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:19,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:20:19,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:20:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:19,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:20:19,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:19,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 22:20:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:20:19,649 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:19,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:19,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916520042] [2023-11-21 22:20:19,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916520042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:19,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:19,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:20:19,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764513782] [2023-11-21 22:20:19,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:19,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:20:19,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:19,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:20:19,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:20:20,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 140 [2023-11-21 22:20:20,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 166 transitions, 578 flow. Second operand has 5 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:20,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:20,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 140 [2023-11-21 22:20:20,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:21,803 INFO L124 PetriNetUnfolderBase]: 2191/5119 cut-off events. [2023-11-21 22:20:21,803 INFO L125 PetriNetUnfolderBase]: For 82/90 co-relation queries the response was YES. [2023-11-21 22:20:21,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8255 conditions, 5119 events. 2191/5119 cut-off events. For 82/90 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 42566 event pairs, 1382 based on Foata normal form. 0/3855 useless extension candidates. Maximal degree in co-relation 8168. Up to 2953 conditions per place. [2023-11-21 22:20:21,849 INFO L140 encePairwiseOnDemand]: 134/140 looper letters, 82 selfloop transitions, 9 changer transitions 0/169 dead transitions. [2023-11-21 22:20:21,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 169 transitions, 766 flow [2023-11-21 22:20:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:20:21,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:20:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 482 transitions. [2023-11-21 22:20:21,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6885714285714286 [2023-11-21 22:20:21,853 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 482 transitions. [2023-11-21 22:20:21,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 482 transitions. [2023-11-21 22:20:21,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:21,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 482 transitions. [2023-11-21 22:20:21,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.4) internal successors, (482), 5 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:21,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:21,858 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:21,858 INFO L175 Difference]: Start difference. First operand has 141 places, 166 transitions, 578 flow. Second operand 5 states and 482 transitions. [2023-11-21 22:20:21,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 169 transitions, 766 flow [2023-11-21 22:20:21,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 169 transitions, 683 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-11-21 22:20:21,866 INFO L231 Difference]: Finished difference. Result has 143 places, 169 transitions, 536 flow [2023-11-21 22:20:21,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=143, PETRI_TRANSITIONS=169} [2023-11-21 22:20:21,867 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, 9 predicate places. [2023-11-21 22:20:21,868 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 169 transitions, 536 flow [2023-11-21 22:20:21,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:21,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:21,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:21,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:22,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:22,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:20:22,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash 972819536, now seen corresponding path program 1 times [2023-11-21 22:20:22,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:22,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137945864] [2023-11-21 22:20:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:22,072 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 [2023-11-21 22:20:22,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:22,074 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:20:22,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:20:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:22,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:20:22,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:22,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 22:20:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:20:22,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:22,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:22,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137945864] [2023-11-21 22:20:22,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137945864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:22,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:22,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:20:22,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888268637] [2023-11-21 22:20:22,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:22,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:20:22,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:22,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:20:22,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:20:22,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 140 [2023-11-21 22:20:22,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 169 transitions, 536 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:22,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:22,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 140 [2023-11-21 22:20:22,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:23,493 INFO L124 PetriNetUnfolderBase]: 2191/5115 cut-off events. [2023-11-21 22:20:23,493 INFO L125 PetriNetUnfolderBase]: For 73/81 co-relation queries the response was YES. [2023-11-21 22:20:23,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8226 conditions, 5115 events. 2191/5115 cut-off events. For 73/81 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 42570 event pairs, 1382 based on Foata normal form. 2/3856 useless extension candidates. Maximal degree in co-relation 8197. Up to 2941 conditions per place. [2023-11-21 22:20:23,555 INFO L140 encePairwiseOnDemand]: 135/140 looper letters, 82 selfloop transitions, 6 changer transitions 0/166 dead transitions. [2023-11-21 22:20:23,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 166 transitions, 706 flow [2023-11-21 22:20:23,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:20:23,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:20:23,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2023-11-21 22:20:23,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2023-11-21 22:20:23,559 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2023-11-21 22:20:23,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2023-11-21 22:20:23,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:23,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2023-11-21 22:20:23,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:23,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:23,563 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:23,563 INFO L175 Difference]: Start difference. First operand has 143 places, 169 transitions, 536 flow. Second operand 3 states and 308 transitions. [2023-11-21 22:20:23,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 166 transitions, 706 flow [2023-11-21 22:20:23,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 166 transitions, 697 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:20:23,573 INFO L231 Difference]: Finished difference. Result has 140 places, 166 transitions, 533 flow [2023-11-21 22:20:23,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=533, PETRI_PLACES=140, PETRI_TRANSITIONS=166} [2023-11-21 22:20:23,576 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, 6 predicate places. [2023-11-21 22:20:23,577 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 166 transitions, 533 flow [2023-11-21 22:20:23,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:23,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:23,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:23,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:23,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:23,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:20:23,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:23,782 INFO L85 PathProgramCache]: Analyzing trace with hash 92636715, now seen corresponding path program 1 times [2023-11-21 22:20:23,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:23,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467776385] [2023-11-21 22:20:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:23,783 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 [2023-11-21 22:20:23,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:23,785 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:20:23,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:20:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:23,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 22:20:23,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:23,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 22:20:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:20:24,029 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:24,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:24,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467776385] [2023-11-21 22:20:24,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467776385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:24,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:24,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:20:24,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780584088] [2023-11-21 22:20:24,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:24,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:20:24,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:24,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:20:24,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:20:24,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 140 [2023-11-21 22:20:24,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 166 transitions, 533 flow. Second operand has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:24,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:24,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 140 [2023-11-21 22:20:24,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:26,044 INFO L124 PetriNetUnfolderBase]: 2192/5118 cut-off events. [2023-11-21 22:20:26,045 INFO L125 PetriNetUnfolderBase]: For 73/81 co-relation queries the response was YES. [2023-11-21 22:20:26,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8238 conditions, 5118 events. 2192/5118 cut-off events. For 73/81 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 42570 event pairs, 1382 based on Foata normal form. 0/3854 useless extension candidates. Maximal degree in co-relation 8209. Up to 2948 conditions per place. [2023-11-21 22:20:26,102 INFO L140 encePairwiseOnDemand]: 134/140 looper letters, 85 selfloop transitions, 9 changer transitions 0/169 dead transitions. [2023-11-21 22:20:26,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 169 transitions, 727 flow [2023-11-21 22:20:26,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:20:26,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:20:26,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 482 transitions. [2023-11-21 22:20:26,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6885714285714286 [2023-11-21 22:20:26,106 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 482 transitions. [2023-11-21 22:20:26,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 482 transitions. [2023-11-21 22:20:26,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:26,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 482 transitions. [2023-11-21 22:20:26,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.4) internal successors, (482), 5 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:26,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:26,111 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:26,111 INFO L175 Difference]: Start difference. First operand has 140 places, 166 transitions, 533 flow. Second operand 5 states and 482 transitions. [2023-11-21 22:20:26,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 169 transitions, 727 flow [2023-11-21 22:20:26,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 169 transitions, 715 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:20:26,117 INFO L231 Difference]: Finished difference. Result has 144 places, 169 transitions, 559 flow [2023-11-21 22:20:26,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=559, PETRI_PLACES=144, PETRI_TRANSITIONS=169} [2023-11-21 22:20:26,119 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, 10 predicate places. [2023-11-21 22:20:26,119 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 169 transitions, 559 flow [2023-11-21 22:20:26,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:26,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:26,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:26,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:26,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:26,328 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:20:26,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:26,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1423229048, now seen corresponding path program 1 times [2023-11-21 22:20:26,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:26,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136058904] [2023-11-21 22:20:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:26,329 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 [2023-11-21 22:20:26,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:26,331 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:20:26,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:20:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:26,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 22:20:26,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:26,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:20:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:26,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:26,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136058904] [2023-11-21 22:20:26,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136058904] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:20:26,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:20:26,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-21 22:20:26,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156308238] [2023-11-21 22:20:26,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:20:26,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:20:26,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:26,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:20:26,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:20:27,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 140 [2023-11-21 22:20:27,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 169 transitions, 559 flow. Second operand has 10 states, 10 states have (on average 89.6) internal successors, (896), 10 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:27,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:27,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 140 [2023-11-21 22:20:27,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:29,587 INFO L124 PetriNetUnfolderBase]: 4374/10210 cut-off events. [2023-11-21 22:20:29,588 INFO L125 PetriNetUnfolderBase]: For 138/155 co-relation queries the response was YES. [2023-11-21 22:20:29,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16393 conditions, 10210 events. 4374/10210 cut-off events. For 138/155 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 96362 event pairs, 2771 based on Foata normal form. 2/7768 useless extension candidates. Maximal degree in co-relation 16343. Up to 2934 conditions per place. [2023-11-21 22:20:29,779 INFO L140 encePairwiseOnDemand]: 129/140 looper letters, 133 selfloop transitions, 32 changer transitions 0/243 dead transitions. [2023-11-21 22:20:29,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 243 transitions, 1166 flow [2023-11-21 22:20:29,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:20:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-21 22:20:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 898 transitions. [2023-11-21 22:20:29,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7126984126984127 [2023-11-21 22:20:29,784 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 898 transitions. [2023-11-21 22:20:29,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 898 transitions. [2023-11-21 22:20:29,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:29,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 898 transitions. [2023-11-21 22:20:29,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 99.77777777777777) internal successors, (898), 9 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:29,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 140.0) internal successors, (1400), 10 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:29,792 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 140.0) internal successors, (1400), 10 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:29,793 INFO L175 Difference]: Start difference. First operand has 144 places, 169 transitions, 559 flow. Second operand 9 states and 898 transitions. [2023-11-21 22:20:29,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 243 transitions, 1166 flow [2023-11-21 22:20:29,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 243 transitions, 1152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:20:29,801 INFO L231 Difference]: Finished difference. Result has 150 places, 182 transitions, 670 flow [2023-11-21 22:20:29,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=150, PETRI_TRANSITIONS=182} [2023-11-21 22:20:29,802 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, 16 predicate places. [2023-11-21 22:20:29,802 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 182 transitions, 670 flow [2023-11-21 22:20:29,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 89.6) internal successors, (896), 10 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:29,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:29,803 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:29,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:20:30,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:30,007 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:20:30,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:30,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1423250244, now seen corresponding path program 1 times [2023-11-21 22:20:30,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:30,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082654509] [2023-11-21 22:20:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:30,007 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 [2023-11-21 22:20:30,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:30,008 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:20:30,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:20:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:30,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 22:20:30,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:30,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 22:20:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:20:30,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:20:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:20:30,863 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:30,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082654509] [2023-11-21 22:20:30,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082654509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:20:30,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:20:30,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-21 22:20:30,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750662646] [2023-11-21 22:20:30,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:20:30,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:20:30,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:30,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:20:30,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:20:35,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 140 [2023-11-21 22:20:35,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 182 transitions, 670 flow. Second operand has 11 states, 11 states have (on average 86.81818181818181) internal successors, (955), 11 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:35,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:35,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 140 [2023-11-21 22:20:35,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:39,815 INFO L124 PetriNetUnfolderBase]: 4389/10254 cut-off events. [2023-11-21 22:20:39,816 INFO L125 PetriNetUnfolderBase]: For 151/167 co-relation queries the response was YES. [2023-11-21 22:20:39,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16566 conditions, 10254 events. 4389/10254 cut-off events. For 151/167 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 96527 event pairs, 2764 based on Foata normal form. 12/7751 useless extension candidates. Maximal degree in co-relation 16486. Up to 5893 conditions per place. [2023-11-21 22:20:39,928 INFO L140 encePairwiseOnDemand]: 126/140 looper letters, 88 selfloop transitions, 49 changer transitions 0/212 dead transitions. [2023-11-21 22:20:39,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 212 transitions, 1098 flow [2023-11-21 22:20:39,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:20:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-21 22:20:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1017 transitions. [2023-11-21 22:20:39,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603896103896104 [2023-11-21 22:20:39,935 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1017 transitions. [2023-11-21 22:20:39,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1017 transitions. [2023-11-21 22:20:39,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:39,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1017 transitions. [2023-11-21 22:20:39,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 92.45454545454545) internal successors, (1017), 11 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:39,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 140.0) internal successors, (1680), 12 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:39,948 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 140.0) internal successors, (1680), 12 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:39,949 INFO L175 Difference]: Start difference. First operand has 150 places, 182 transitions, 670 flow. Second operand 11 states and 1017 transitions. [2023-11-21 22:20:39,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 212 transitions, 1098 flow [2023-11-21 22:20:39,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 212 transitions, 1097 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:20:39,958 INFO L231 Difference]: Finished difference. Result has 163 places, 212 transitions, 1004 flow [2023-11-21 22:20:39,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1004, PETRI_PLACES=163, PETRI_TRANSITIONS=212} [2023-11-21 22:20:39,961 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, 29 predicate places. [2023-11-21 22:20:39,961 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 212 transitions, 1004 flow [2023-11-21 22:20:39,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.81818181818181) internal successors, (955), 11 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:39,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:39,962 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-21 22:20:39,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:20:40,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:40,165 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:20:40,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:40,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1346433134, now seen corresponding path program 2 times [2023-11-21 22:20:40,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:40,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418958887] [2023-11-21 22:20:40,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:20:40,166 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 [2023-11-21 22:20:40,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:40,168 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:20:40,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a212c9-397a-4d8f-8907-ba92af7c0d57/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:20:40,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:20:40,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:20:40,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 22:20:40,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:40,330 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 [2023-11-21 22:20:40,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,345 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 [2023-11-21 22:20:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,356 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 [2023-11-21 22:20:40,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,362 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 [2023-11-21 22:20:40,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,375 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 [2023-11-21 22:20:40,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,382 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 [2023-11-21 22:20:40,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,402 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 [2023-11-21 22:20:40,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,425 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 [2023-11-21 22:20:40,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,441 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 [2023-11-21 22:20:40,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,451 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 [2023-11-21 22:20:40,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,462 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 [2023-11-21 22:20:40,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,470 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 [2023-11-21 22:20:40,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,480 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 [2023-11-21 22:20:40,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,491 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 [2023-11-21 22:20:40,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,506 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 [2023-11-21 22:20:40,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,512 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 [2023-11-21 22:20:40,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,533 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 [2023-11-21 22:20:40,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,552 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 [2023-11-21 22:20:40,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,571 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 [2023-11-21 22:20:40,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,590 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 [2023-11-21 22:20:40,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,605 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 [2023-11-21 22:20:40,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,626 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 [2023-11-21 22:20:40,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-21 22:20:40,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:40,699 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 [2023-11-21 22:20:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:40,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:20:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:41,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:41,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418958887] [2023-11-21 22:20:41,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418958887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:20:41,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:20:41,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-21 22:20:41,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473444782] [2023-11-21 22:20:41,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:20:41,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:20:41,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:41,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:20:41,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182