./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu --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 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:57:40,921 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:57:40,991 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:57:40,997 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:57:40,998 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:57:41,026 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:57:41,027 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:57:41,027 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:57:41,028 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:57:41,029 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:57:41,030 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:57:41,030 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:57:41,031 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:57:41,032 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:57:41,033 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:57:41,033 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:57:41,034 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:57:41,034 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:57:41,035 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:57:41,036 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:57:41,038 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:57:41,038 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:57:41,039 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:57:41,039 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:57:41,040 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:57:41,040 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:57:41,041 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:57:41,041 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:57:41,042 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:57:41,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:57:41,043 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:57:41,043 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:57:41,044 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:57:41,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:57:41,045 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:57:41,045 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:57:41,046 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:57:41,046 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:57:41,047 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_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 [2023-11-19 07:57:41,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:57:41,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:57:41,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:57:41,350 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:57:41,351 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:57:41,353 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/unroll-2.wvr.c [2023-11-19 07:57:44,476 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:57:44,816 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:57:44,817 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/sv-benchmarks/c/weaver/unroll-2.wvr.c [2023-11-19 07:57:44,829 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/data/1b8a2884f/49ffb62ae68645578626d7f877fcb8ab/FLAGfb23e75ba [2023-11-19 07:57:44,849 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/data/1b8a2884f/49ffb62ae68645578626d7f877fcb8ab [2023-11-19 07:57:44,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:57:44,860 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:57:44,864 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:57:44,864 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:57:44,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:57:44,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:44" (1/1) ... [2023-11-19 07:57:44,874 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490594a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:44, skipping insertion in model container [2023-11-19 07:57:44,875 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:44" (1/1) ... [2023-11-19 07:57:44,908 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:57:45,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:57:45,184 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) [2023-11-19 07:57:45,185 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b0b30e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:45, skipping insertion in model container [2023-11-19 07:57:45,185 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:57:45,185 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-19 07:57:45,187 INFO L158 Benchmark]: Toolchain (without parser) took 326.38ms. Allocated memory is still 153.1MB. Free memory was 118.0MB in the beginning and 108.0MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-19 07:57:45,188 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory was 66.1MB in the beginning and 65.9MB in the end (delta: 176.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:57:45,188 INFO L158 Benchmark]: CACSL2BoogieTranslator took 321.22ms. Allocated memory is still 153.1MB. Free memory was 118.0MB in the beginning and 108.0MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-19 07:57:45,190 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory was 66.1MB in the beginning and 65.9MB in the end (delta: 176.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 321.22ms. Allocated memory is still 153.1MB. Free memory was 118.0MB in the beginning and 108.0MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 97]: 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_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu --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 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:57:47,628 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:57:47,757 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-19 07:57:47,768 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:57:47,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:57:47,818 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:57:47,820 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:57:47,820 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:57:47,823 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:57:47,828 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:57:47,829 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:57:47,829 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:57:47,830 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:57:47,832 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:57:47,832 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:57:47,832 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:57:47,833 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:57:47,833 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:57:47,834 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:57:47,835 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:57:47,835 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:57:47,836 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:57:47,836 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:57:47,836 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-19 07:57:47,837 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-19 07:57:47,837 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:57:47,838 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:57:47,838 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:57:47,839 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:57:47,839 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:57:47,841 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:57:47,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:57:47,841 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:57:47,842 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:57:47,842 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-19 07:57:47,842 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-19 07:57:47,842 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:57:47,843 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:57:47,843 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:57:47,844 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-19 07:57:47,844 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:57:47,844 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_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 [2023-11-19 07:57:48,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:57:48,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:57:48,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:57:48,301 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:57:48,302 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:57:48,303 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/unroll-2.wvr.c [2023-11-19 07:57:51,452 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:57:51,775 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:57:51,775 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/sv-benchmarks/c/weaver/unroll-2.wvr.c [2023-11-19 07:57:51,787 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/data/bd8666d3b/9bfcde8c52494b05b41d876b87cceaee/FLAG7a212aaf4 [2023-11-19 07:57:51,804 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/data/bd8666d3b/9bfcde8c52494b05b41d876b87cceaee [2023-11-19 07:57:51,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:57:51,809 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:57:51,811 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:57:51,812 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:57:51,818 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:57:51,819 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:51" (1/1) ... [2023-11-19 07:57:51,821 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72135acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:51, skipping insertion in model container [2023-11-19 07:57:51,821 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:51" (1/1) ... [2023-11-19 07:57:51,851 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:57:52,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:57:52,178 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-19 07:57:52,193 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:57:52,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:57:52,247 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:57:52,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:57:52,327 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:57:52,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:52 WrapperNode [2023-11-19 07:57:52,328 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:57:52,329 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:57:52,330 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:57:52,330 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:57:52,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:52" (1/1) ... [2023-11-19 07:57:52,379 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:52" (1/1) ... [2023-11-19 07:57:52,449 INFO L138 Inliner]: procedures = 26, calls = 33, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 139 [2023-11-19 07:57:52,450 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:57:52,452 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:57:52,453 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:57:52,453 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:57:52,466 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:52" (1/1) ... [2023-11-19 07:57:52,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:52" (1/1) ... [2023-11-19 07:57:52,491 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:52" (1/1) ... [2023-11-19 07:57:52,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:52" (1/1) ... [2023-11-19 07:57:52,502 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:52" (1/1) ... [2023-11-19 07:57:52,520 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:52" (1/1) ... [2023-11-19 07:57:52,526 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:52" (1/1) ... [2023-11-19 07:57:52,534 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:52" (1/1) ... [2023-11-19 07:57:52,539 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:57:52,543 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:57:52,544 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:57:52,544 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:57:52,545 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:52" (1/1) ... [2023-11-19 07:57:52,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:57:52,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:52,586 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:52,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:57:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:57:52,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-19 07:57:52,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:57:52,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-19 07:57:52,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:57:52,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:57:52,625 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:57:52,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:57:52,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:57:52,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:57:52,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:57:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:57:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-19 07:57:52,631 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:57:52,764 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:57:52,767 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:57:53,390 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:57:53,411 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:57:53,411 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:57:53,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:53 BoogieIcfgContainer [2023-11-19 07:57:53,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:57:53,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:57:53,425 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:57:53,429 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:57:53,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:57:51" (1/3) ... [2023-11-19 07:57:53,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5366e8d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:53, skipping insertion in model container [2023-11-19 07:57:53,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:52" (2/3) ... [2023-11-19 07:57:53,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5366e8d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:53, skipping insertion in model container [2023-11-19 07:57:53,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:53" (3/3) ... [2023-11-19 07:57:53,433 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2023-11-19 07:57:53,454 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:57:53,454 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-19 07:57:53,455 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:57:53,617 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:57:53,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 194 transitions, 402 flow [2023-11-19 07:57:53,820 INFO L124 PetriNetUnfolderBase]: 14/192 cut-off events. [2023-11-19 07:57:53,820 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:57:53,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 192 events. 14/192 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 242 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 118. Up to 2 conditions per place. [2023-11-19 07:57:53,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 194 transitions, 402 flow [2023-11-19 07:57:53,840 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 187 transitions, 386 flow [2023-11-19 07:57:53,844 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:57:53,862 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 187 transitions, 386 flow [2023-11-19 07:57:53,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 187 transitions, 386 flow [2023-11-19 07:57:53,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 187 transitions, 386 flow [2023-11-19 07:57:53,923 INFO L124 PetriNetUnfolderBase]: 14/187 cut-off events. [2023-11-19 07:57:53,923 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:57:53,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 14/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 241 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 118. Up to 2 conditions per place. [2023-11-19 07:57:53,929 INFO L119 LiptonReduction]: Number of co-enabled transitions 3172 [2023-11-19 07:58:12,054 INFO L134 LiptonReduction]: Checked pairs total: 3258 [2023-11-19 07:58:12,054 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-11-19 07:58:12,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:58:12,079 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;@48e2924, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:58:12,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-19 07:58:12,083 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:58:12,083 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-19 07:58:12,083 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:58:12,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:12,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:58:12,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:58:12,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:12,091 INFO L85 PathProgramCache]: Analyzing trace with hash 24244, now seen corresponding path program 1 times [2023-11-19 07:58:12,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:58:12,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908617288] [2023-11-19 07:58:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:12,107 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 [2023-11-19 07:58:12,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:58:12,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:58:12,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:58:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:12,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:58:12,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:12,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-19 07:58:12,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:12,321 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 [2023-11-19 07:58:12,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:12,341 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 [2023-11-19 07:58:12,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:12,347 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 [2023-11-19 07:58:12,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:12,357 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 [2023-11-19 07:58:12,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:12,369 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 [2023-11-19 07:58:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:12,378 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:12,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:58:12,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908617288] [2023-11-19 07:58:12,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908617288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:12,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:12,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:58:12,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864449589] [2023-11-19 07:58:12,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:12,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:12,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:58:12,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:12,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:12,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 410 [2023-11-19 07:58:12,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:12,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:12,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 410 [2023-11-19 07:58:12,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:12,947 INFO L124 PetriNetUnfolderBase]: 256/427 cut-off events. [2023-11-19 07:58:12,948 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-19 07:58:12,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 427 events. 256/427 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 1559 event pairs, 203 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 750. Up to 425 conditions per place. [2023-11-19 07:58:12,960 INFO L140 encePairwiseOnDemand]: 403/410 looper letters, 27 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2023-11-19 07:58:12,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 136 flow [2023-11-19 07:58:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:12,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-11-19 07:58:12,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44471544715447153 [2023-11-19 07:58:12,987 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-11-19 07:58:12,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-11-19 07:58:12,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:12,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-11-19 07:58:13,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:13,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:13,012 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:13,014 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 547 transitions. [2023-11-19 07:58:13,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 136 flow [2023-11-19 07:58:13,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:58:13,021 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 74 flow [2023-11-19 07:58:13,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-19 07:58:13,028 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-11-19 07:58:13,028 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 74 flow [2023-11-19 07:58:13,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:13,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:13,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:58:13,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:58:13,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:58:13,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:58:13,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash 24245, now seen corresponding path program 1 times [2023-11-19 07:58:13,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:58:13,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844726835] [2023-11-19 07:58:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:13,234 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 [2023-11-19 07:58:13,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:58:13,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:58:13,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:58:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:13,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:58:13,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:13,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 07:58:13,400 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 [2023-11-19 07:58:13,433 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 [2023-11-19 07:58:13,461 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 [2023-11-19 07:58:13,487 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 [2023-11-19 07:58:13,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 07:58:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:13,550 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:13,550 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:58:13,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844726835] [2023-11-19 07:58:13,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844726835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:13,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:13,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:58:13,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932155759] [2023-11-19 07:58:13,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:13,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:13,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:58:13,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:13,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:13,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 410 [2023-11-19 07:58:13,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:13,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:13,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 410 [2023-11-19 07:58:13,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:14,157 INFO L124 PetriNetUnfolderBase]: 259/431 cut-off events. [2023-11-19 07:58:14,157 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:58:14,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 431 events. 259/431 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 1567 event pairs, 203 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 848. Up to 431 conditions per place. [2023-11-19 07:58:14,163 INFO L140 encePairwiseOnDemand]: 404/410 looper letters, 30 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-11-19 07:58:14,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 158 flow [2023-11-19 07:58:14,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-11-19 07:58:14,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2023-11-19 07:58:14,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-11-19 07:58:14,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-11-19 07:58:14,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:14,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-11-19 07:58:14,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:14,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:14,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:14,178 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 74 flow. Second operand 3 states and 549 transitions. [2023-11-19 07:58:14,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 158 flow [2023-11-19 07:58:14,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:58:14,182 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 99 flow [2023-11-19 07:58:14,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2023-11-19 07:58:14,183 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-11-19 07:58:14,183 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 99 flow [2023-11-19 07:58:14,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:14,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:14,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:58:14,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:58:14,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:58:14,393 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:58:14,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:14,394 INFO L85 PathProgramCache]: Analyzing trace with hash 24320, now seen corresponding path program 1 times [2023-11-19 07:58:14,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:58:14,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403204881] [2023-11-19 07:58:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:14,395 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 [2023-11-19 07:58:14,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:58:14,396 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:58:14,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:58:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:14,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:58:14,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:14,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:14,500 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:58:14,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403204881] [2023-11-19 07:58:14,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403204881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:14,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:14,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:58:14,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500149601] [2023-11-19 07:58:14,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:14,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:14,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:58:14,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:14,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:14,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 410 [2023-11-19 07:58:14,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:14,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:14,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 410 [2023-11-19 07:58:14,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:14,866 INFO L124 PetriNetUnfolderBase]: 256/428 cut-off events. [2023-11-19 07:58:14,867 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:58:14,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 428 events. 256/428 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 1570 event pairs, 203 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 863. Up to 428 conditions per place. [2023-11-19 07:58:14,871 INFO L140 encePairwiseOnDemand]: 405/410 looper letters, 30 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-11-19 07:58:14,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 148 flow [2023-11-19 07:58:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:14,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 551 transitions. [2023-11-19 07:58:14,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479674796747967 [2023-11-19 07:58:14,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 551 transitions. [2023-11-19 07:58:14,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 551 transitions. [2023-11-19 07:58:14,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:14,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 551 transitions. [2023-11-19 07:58:14,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:14,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:14,883 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:14,883 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 99 flow. Second operand 3 states and 551 transitions. [2023-11-19 07:58:14,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 148 flow [2023-11-19 07:58:14,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 144 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:58:14,885 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 84 flow [2023-11-19 07:58:14,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-11-19 07:58:14,887 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-11-19 07:58:14,887 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 84 flow [2023-11-19 07:58:14,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:14,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:14,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:58:14,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:15,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:58:15,091 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:58:15,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash 753347, now seen corresponding path program 1 times [2023-11-19 07:58:15,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:58:15,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112362842] [2023-11-19 07:58:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:15,092 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 [2023-11-19 07:58:15,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:58:15,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:58:15,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:58:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:15,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:58:15,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:15,239 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:58:15,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-19 07:58:15,270 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:58:15,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-19 07:58:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:58:15,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:15,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:58:15,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112362842] [2023-11-19 07:58:15,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112362842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:15,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:15,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:58:15,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190823447] [2023-11-19 07:58:15,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:15,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:15,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:58:15,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:15,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:15,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 410 [2023-11-19 07:58:15,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:15,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:15,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 410 [2023-11-19 07:58:15,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:15,851 INFO L124 PetriNetUnfolderBase]: 196/337 cut-off events. [2023-11-19 07:58:15,851 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:58:15,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 337 events. 196/337 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1162 event pairs, 154 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 680. Up to 337 conditions per place. [2023-11-19 07:58:15,855 INFO L140 encePairwiseOnDemand]: 407/410 looper letters, 29 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-11-19 07:58:15,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 138 flow [2023-11-19 07:58:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:15,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-11-19 07:58:15,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2023-11-19 07:58:15,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-11-19 07:58:15,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-11-19 07:58:15,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:15,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-11-19 07:58:15,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:15,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:15,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:15,869 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 84 flow. Second operand 3 states and 535 transitions. [2023-11-19 07:58:15,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 138 flow [2023-11-19 07:58:15,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:58:15,872 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 76 flow [2023-11-19 07:58:15,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-11-19 07:58:15,873 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-11-19 07:58:15,873 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 76 flow [2023-11-19 07:58:15,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:15,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:15,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:58:15,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:58:16,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:58:16,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:58:16,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:16,078 INFO L85 PathProgramCache]: Analyzing trace with hash 753345, now seen corresponding path program 1 times [2023-11-19 07:58:16,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:58:16,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516717175] [2023-11-19 07:58:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:16,079 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 [2023-11-19 07:58:16,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:58:16,081 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:58:16,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:58:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:16,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:58:16,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:16,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:16,249 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-19 07:58:16,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-19 07:58:16,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:58:16,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:16,323 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 13 [2023-11-19 07:58:16,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:16,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 07:58:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:16,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:16,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:58:16,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516717175] [2023-11-19 07:58:16,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516717175] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:16,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:58:16,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-19 07:58:16,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578047669] [2023-11-19 07:58:16,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:16,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:58:16,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:58:16,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:58:16,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:58:19,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:58:19,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 410 [2023-11-19 07:58:19,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:19,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:19,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 410 [2023-11-19 07:58:19,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:20,492 INFO L124 PetriNetUnfolderBase]: 200/346 cut-off events. [2023-11-19 07:58:20,492 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:58:20,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 346 events. 200/346 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1196 event pairs, 154 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 709. Up to 337 conditions per place. [2023-11-19 07:58:20,495 INFO L140 encePairwiseOnDemand]: 405/410 looper letters, 30 selfloop transitions, 9 changer transitions 0/39 dead transitions. [2023-11-19 07:58:20,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 39 transitions, 190 flow [2023-11-19 07:58:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:58:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:58:20,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1002 transitions. [2023-11-19 07:58:20,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2023-11-19 07:58:20,500 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1002 transitions. [2023-11-19 07:58:20,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1002 transitions. [2023-11-19 07:58:20,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:20,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1002 transitions. [2023-11-19 07:58:20,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 167.0) internal successors, (1002), 6 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:20,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 410.0) internal successors, (2870), 7 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:20,512 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 410.0) internal successors, (2870), 7 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:20,512 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 76 flow. Second operand 6 states and 1002 transitions. [2023-11-19 07:58:20,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 39 transitions, 190 flow [2023-11-19 07:58:20,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 39 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:58:20,514 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 149 flow [2023-11-19 07:58:20,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-19 07:58:20,515 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-11-19 07:58:20,516 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 149 flow [2023-11-19 07:58:20,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:20,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:20,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:58:20,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:58:20,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:58:20,720 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:58:20,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash 753272, now seen corresponding path program 1 times [2023-11-19 07:58:20,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:58:20,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876510922] [2023-11-19 07:58:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:20,721 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 [2023-11-19 07:58:20,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:58:20,722 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:58:20,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:58:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:20,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:58:20,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:20,827 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 [2023-11-19 07:58:20,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:20,856 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 [2023-11-19 07:58:20,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:20,866 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 [2023-11-19 07:58:20,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:20,879 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 [2023-11-19 07:58:20,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:20,889 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 [2023-11-19 07:58:20,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:20,902 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 [2023-11-19 07:58:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:20,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:21,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:58:21,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876510922] [2023-11-19 07:58:21,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876510922] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:21,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:58:21,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-19 07:58:21,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405255515] [2023-11-19 07:58:21,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:21,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:58:21,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:58:21,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:58:21,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:58:22,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 410 [2023-11-19 07:58:22,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 149 flow. Second operand has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:22,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:22,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 410 [2023-11-19 07:58:22,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:23,027 INFO L124 PetriNetUnfolderBase]: 199/343 cut-off events. [2023-11-19 07:58:23,028 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:58:23,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 343 events. 199/343 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1197 event pairs, 154 based on Foata normal form. 3/151 useless extension candidates. Maximal degree in co-relation 720. Up to 340 conditions per place. [2023-11-19 07:58:23,031 INFO L140 encePairwiseOnDemand]: 406/410 looper letters, 28 selfloop transitions, 8 changer transitions 0/36 dead transitions. [2023-11-19 07:58:23,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 215 flow [2023-11-19 07:58:23,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:58:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:58:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1029 transitions. [2023-11-19 07:58:23,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41829268292682925 [2023-11-19 07:58:23,037 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1029 transitions. [2023-11-19 07:58:23,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1029 transitions. [2023-11-19 07:58:23,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:23,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1029 transitions. [2023-11-19 07:58:23,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:23,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 410.0) internal successors, (2870), 7 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:23,048 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 410.0) internal successors, (2870), 7 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:23,048 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 149 flow. Second operand 6 states and 1029 transitions. [2023-11-19 07:58:23,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 215 flow [2023-11-19 07:58:23,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 36 transitions, 195 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-19 07:58:23,051 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 139 flow [2023-11-19 07:58:23,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=139, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-11-19 07:58:23,052 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-11-19 07:58:23,053 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 139 flow [2023-11-19 07:58:23,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:23,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:23,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:58:23,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-19 07:58:23,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:58:23,257 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:58:23,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:23,257 INFO L85 PathProgramCache]: Analyzing trace with hash 723982050, now seen corresponding path program 1 times [2023-11-19 07:58:23,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:58:23,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209342551] [2023-11-19 07:58:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:23,258 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 [2023-11-19 07:58:23,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:58:23,259 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:58:23,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:58:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:23,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:58:23,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:23,382 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:58:23,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-19 07:58:23,413 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:58:23,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-19 07:58:23,456 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:58:23,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-19 07:58:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:58:23,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:23,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:58:23,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209342551] [2023-11-19 07:58:23,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209342551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:23,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:23,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:58:23,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186413611] [2023-11-19 07:58:23,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:23,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:23,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:58:23,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:23,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:23,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 410 [2023-11-19 07:58:23,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:23,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:23,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 410 [2023-11-19 07:58:23,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:23,976 INFO L124 PetriNetUnfolderBase]: 188/321 cut-off events. [2023-11-19 07:58:23,977 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-19 07:58:23,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 321 events. 188/321 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1075 event pairs, 145 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 674. Up to 321 conditions per place. [2023-11-19 07:58:23,980 INFO L140 encePairwiseOnDemand]: 407/410 looper letters, 33 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-11-19 07:58:23,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 34 transitions, 203 flow [2023-11-19 07:58:23,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-11-19 07:58:23,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-19 07:58:23,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-11-19 07:58:23,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-11-19 07:58:23,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:23,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-11-19 07:58:23,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:23,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:23,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:23,990 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 139 flow. Second operand 3 states and 533 transitions. [2023-11-19 07:58:23,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 34 transitions, 203 flow [2023-11-19 07:58:23,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 178 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-19 07:58:23,996 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 112 flow [2023-11-19 07:58:23,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-11-19 07:58:23,998 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-11-19 07:58:23,998 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 112 flow [2023-11-19 07:58:23,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:23,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:23,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:58:24,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:58:24,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:58:24,202 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:58:24,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:24,202 INFO L85 PathProgramCache]: Analyzing trace with hash 723982049, now seen corresponding path program 1 times [2023-11-19 07:58:24,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:58:24,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582806247] [2023-11-19 07:58:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:24,203 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 [2023-11-19 07:58:24,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:58:24,204 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:58:24,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:58:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:24,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:58:24,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:24,377 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-19 07:58:24,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-19 07:58:24,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:24,439 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-19 07:58:24,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-19 07:58:24,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:24,486 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-19 07:58:24,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-19 07:58:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:24,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:25,242 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:58:25,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582806247] [2023-11-19 07:58:25,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582806247] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:25,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:58:25,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-19 07:58:25,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402676677] [2023-11-19 07:58:25,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:25,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:58:25,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:58:25,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:58:25,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:58:26,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 410 [2023-11-19 07:58:26,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 112 flow. Second operand has 8 states, 8 states have (on average 161.25) internal successors, (1290), 8 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:26,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:26,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 410 [2023-11-19 07:58:26,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:27,458 INFO L124 PetriNetUnfolderBase]: 177/299 cut-off events. [2023-11-19 07:58:27,458 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:58:27,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 299 events. 177/299 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 993 event pairs, 136 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 616. Up to 297 conditions per place. [2023-11-19 07:58:27,461 INFO L140 encePairwiseOnDemand]: 405/410 looper letters, 28 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2023-11-19 07:58:27,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 172 flow [2023-11-19 07:58:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:58:27,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:58:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 830 transitions. [2023-11-19 07:58:27,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2023-11-19 07:58:27,466 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 830 transitions. [2023-11-19 07:58:27,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 830 transitions. [2023-11-19 07:58:27,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:27,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 830 transitions. [2023-11-19 07:58:27,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 166.0) internal successors, (830), 5 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:27,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 410.0) internal successors, (2460), 6 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:27,476 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 410.0) internal successors, (2460), 6 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:27,476 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 112 flow. Second operand 5 states and 830 transitions. [2023-11-19 07:58:27,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 172 flow [2023-11-19 07:58:27,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 32 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:58:27,479 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 115 flow [2023-11-19 07:58:27,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-11-19 07:58:27,480 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-11-19 07:58:27,480 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 115 flow [2023-11-19 07:58:27,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 161.25) internal successors, (1290), 8 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:27,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:27,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:58:27,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:27,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:58:27,684 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:58:27,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash 968605682, now seen corresponding path program 1 times [2023-11-19 07:58:27,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:58:27,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300614782] [2023-11-19 07:58:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:27,685 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 [2023-11-19 07:58:27,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:58:27,686 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:58:27,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:58:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:27,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:58:27,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:27,795 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 [2023-11-19 07:58:27,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:27,808 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 [2023-11-19 07:58:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:27,819 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 [2023-11-19 07:58:27,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:27,837 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 [2023-11-19 07:58:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:27,849 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 [2023-11-19 07:58:27,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:27,856 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 [2023-11-19 07:58:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:58:27,880 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:27,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:58:27,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300614782] [2023-11-19 07:58:27,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300614782] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:27,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:27,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:58:27,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354990372] [2023-11-19 07:58:27,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:27,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:58:27,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:58:27,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:58:27,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:58:28,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 410 [2023-11-19 07:58:28,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 164.5) internal successors, (658), 4 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:28,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:28,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 410 [2023-11-19 07:58:28,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:28,377 INFO L124 PetriNetUnfolderBase]: 123/211 cut-off events. [2023-11-19 07:58:28,378 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-19 07:58:28,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 211 events. 123/211 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 614 event pairs, 88 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 442. Up to 204 conditions per place. [2023-11-19 07:58:28,383 INFO L140 encePairwiseOnDemand]: 405/410 looper letters, 24 selfloop transitions, 6 changer transitions 0/30 dead transitions. [2023-11-19 07:58:28,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 171 flow [2023-11-19 07:58:28,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:58:28,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:58:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 677 transitions. [2023-11-19 07:58:28,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41280487804878047 [2023-11-19 07:58:28,392 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 677 transitions. [2023-11-19 07:58:28,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 677 transitions. [2023-11-19 07:58:28,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:28,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 677 transitions. [2023-11-19 07:58:28,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:28,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 410.0) internal successors, (2050), 5 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:28,402 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 410.0) internal successors, (2050), 5 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:28,402 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 115 flow. Second operand 4 states and 677 transitions. [2023-11-19 07:58:28,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 171 flow [2023-11-19 07:58:28,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 30 transitions, 165 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:58:28,407 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 117 flow [2023-11-19 07:58:28,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-11-19 07:58:28,409 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-11-19 07:58:28,409 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 117 flow [2023-11-19 07:58:28,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.5) internal successors, (658), 4 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:28,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:28,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:58:28,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:28,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:58:28,613 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:58:28,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:28,613 INFO L85 PathProgramCache]: Analyzing trace with hash 968605681, now seen corresponding path program 1 times [2023-11-19 07:58:28,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:58:28,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928303628] [2023-11-19 07:58:28,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:28,614 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 [2023-11-19 07:58:28,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:58:28,615 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:58:28,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-19 07:58:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:28,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:58:28,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:28,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:28,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-11-19 07:58:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:29,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:58:29,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928303628] [2023-11-19 07:58:29,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928303628] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:29,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:58:29,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-19 07:58:29,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892374278] [2023-11-19 07:58:29,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:29,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:58:29,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:58:29,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:58:29,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:58:31,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 410 [2023-11-19 07:58:31,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 117 flow. Second operand has 8 states, 8 states have (on average 163.5) internal successors, (1308), 8 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:31,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:31,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 410 [2023-11-19 07:58:31,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:31,751 INFO L124 PetriNetUnfolderBase]: 187/321 cut-off events. [2023-11-19 07:58:31,752 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-19 07:58:31,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 321 events. 187/321 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1184 event pairs, 64 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 668. Up to 172 conditions per place. [2023-11-19 07:58:31,754 INFO L140 encePairwiseOnDemand]: 404/410 looper letters, 36 selfloop transitions, 9 changer transitions 0/45 dead transitions. [2023-11-19 07:58:31,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 45 transitions, 240 flow [2023-11-19 07:58:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:58:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:58:31,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1014 transitions. [2023-11-19 07:58:31,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2023-11-19 07:58:31,760 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1014 transitions. [2023-11-19 07:58:31,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1014 transitions. [2023-11-19 07:58:31,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:31,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1014 transitions. [2023-11-19 07:58:31,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:31,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 410.0) internal successors, (2870), 7 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:31,771 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 410.0) internal successors, (2870), 7 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:31,772 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 117 flow. Second operand 6 states and 1014 transitions. [2023-11-19 07:58:31,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 45 transitions, 240 flow [2023-11-19 07:58:31,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 233 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:58:31,774 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 140 flow [2023-11-19 07:58:31,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=140, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-11-19 07:58:31,775 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-11-19 07:58:31,776 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 140 flow [2023-11-19 07:58:31,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 163.5) internal successors, (1308), 8 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:31,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:31,777 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 07:58:31,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:31,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:58:31,980 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:58:31,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:31,980 INFO L85 PathProgramCache]: Analyzing trace with hash 967555006, now seen corresponding path program 2 times [2023-11-19 07:58:31,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:58:31,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085720997] [2023-11-19 07:58:31,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:58:31,981 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 [2023-11-19 07:58:31,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:58:31,982 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:58:31,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-19 07:58:32,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:58:32,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:32,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:58:32,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:32,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:32,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-19 07:58:32,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:58:32,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:32,161 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-19 07:58:32,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-19 07:58:32,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:58:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:58:32,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:32,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:58:32,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085720997] [2023-11-19 07:58:32,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085720997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:32,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:32,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:58:32,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045901260] [2023-11-19 07:58:32,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:32,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:32,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:58:32,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:32,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:32,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 410 [2023-11-19 07:58:32,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:32,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:32,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 410 [2023-11-19 07:58:32,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:33,198 INFO L124 PetriNetUnfolderBase]: 127/230 cut-off events. [2023-11-19 07:58:33,198 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-11-19 07:58:33,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 230 events. 127/230 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 710 event pairs, 95 based on Foata normal form. 1/171 useless extension candidates. Maximal degree in co-relation 535. Up to 230 conditions per place. [2023-11-19 07:58:33,201 INFO L140 encePairwiseOnDemand]: 407/410 looper letters, 28 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-19 07:58:33,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 29 transitions, 182 flow [2023-11-19 07:58:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:33,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:33,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 536 transitions. [2023-11-19 07:58:33,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43577235772357725 [2023-11-19 07:58:33,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 536 transitions. [2023-11-19 07:58:33,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 536 transitions. [2023-11-19 07:58:33,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:33,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 536 transitions. [2023-11-19 07:58:33,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:33,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:33,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:33,212 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 140 flow. Second operand 3 states and 536 transitions. [2023-11-19 07:58:33,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 29 transitions, 182 flow [2023-11-19 07:58:33,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 155 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-19 07:58:33,214 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 99 flow [2023-11-19 07:58:33,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-11-19 07:58:33,215 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-11-19 07:58:33,215 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 99 flow [2023-11-19 07:58:33,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:33,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:33,216 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 07:58:33,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:33,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:58:33,418 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:58:33,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:33,419 INFO L85 PathProgramCache]: Analyzing trace with hash 967554933, now seen corresponding path program 2 times [2023-11-19 07:58:33,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:58:33,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99118311] [2023-11-19 07:58:33,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:58:33,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:58:33,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:58:33,421 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:58:33,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c37b2d0d-e605-4bb5-a601-02270758552f/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-19 07:58:33,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:58:33,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:33,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:58:33,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:33,583 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 [2023-11-19 07:58:33,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:33,604 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 [2023-11-19 07:58:33,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:33,619 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 [2023-11-19 07:58:33,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:33,630 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 [2023-11-19 07:58:33,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:33,641 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 [2023-11-19 07:58:33,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:33,656 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 [2023-11-19 07:58:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:33,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:34,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:58:34,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99118311] [2023-11-19 07:58:34,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99118311] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:34,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:58:34,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-19 07:58:34,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949001264] [2023-11-19 07:58:34,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:34,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:58:34,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:58:34,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:58:34,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132