./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 02:33:45,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:33:45,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:33:45,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:33:45,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:33:45,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:33:45,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:33:45,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:33:45,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:33:45,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:33:45,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:33:45,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:33:45,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:33:45,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:33:45,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:33:45,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:33:45,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:33:45,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:33:45,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:33:45,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:33:45,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:33:45,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:33:45,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:33:45,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:33:45,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:33:45,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:33:45,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:33:45,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:33:45,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:33:45,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:33:45,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:33:45,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:33:45,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:33:45,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:33:45,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:33:45,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:33:45,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:33:45,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:33:45,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:33:45,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:33:45,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:33:45,958 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 02:33:45,992 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:33:45,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:33:45,996 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:33:45,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:33:45,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:33:45,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:33:45,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:33:45,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:33:45,999 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:33:45,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:33:46,000 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:33:46,001 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 02:33:46,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:33:46,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:33:46,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:33:46,002 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 02:33:46,002 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 02:33:46,002 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 02:33:46,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:33:46,003 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 02:33:46,003 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:33:46,003 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:33:46,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:33:46,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:33:46,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:33:46,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:33:46,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:33:46,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:33:46,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:33:46,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:33:46,006 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:33:46,006 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:33:46,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:33:46,006 INFO L138 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_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da [2022-11-23 02:33:46,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:33:46,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:33:46,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:33:46,385 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:33:46,385 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:33:46,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-11-23 02:33:49,444 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:33:49,641 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:33:49,642 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-11-23 02:33:49,649 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/data/72e931335/94611d6ed35a4520bfc4f3e2d5c5d931/FLAG78ec3a4dc [2022-11-23 02:33:49,664 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/data/72e931335/94611d6ed35a4520bfc4f3e2d5c5d931 [2022-11-23 02:33:49,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:33:49,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:33:49,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:33:49,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:33:49,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:33:49,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:33:49" (1/1) ... [2022-11-23 02:33:49,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b2f5b5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49, skipping insertion in model container [2022-11-23 02:33:49,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:33:49" (1/1) ... [2022-11-23 02:33:49,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:33:49,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:33:49,967 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2482,2495] [2022-11-23 02:33:49,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:33:49,989 ERROR L326 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) [2022-11-23 02:33:49,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6d0b383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49, skipping insertion in model container [2022-11-23 02:33:49,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:33:49,990 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 02:33:49,992 INFO L158 Benchmark]: Toolchain (without parser) took 322.95ms. Allocated memory is still 167.8MB. Free memory was 134.4MB in the beginning and 134.8MB in the end (delta: -391.7kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-23 02:33:49,993 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 130.0MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 02:33:49,993 INFO L158 Benchmark]: CACSL2BoogieTranslator took 320.49ms. Allocated memory is still 167.8MB. Free memory was 134.0MB in the beginning and 134.8MB in the end (delta: -792.7kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-23 02:33:49,995 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 130.0MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 320.49ms. Allocated memory is still 167.8MB. Free memory was 134.0MB in the beginning and 134.8MB in the end (delta: -792.7kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 02:33:52,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:33:52,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:33:52,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:33:52,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:33:52,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:33:52,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:33:52,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:33:52,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:33:52,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:33:52,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:33:52,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:33:52,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:33:52,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:33:52,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:33:52,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:33:52,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:33:52,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:33:52,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:33:52,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:33:52,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:33:52,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:33:52,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:33:52,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:33:52,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:33:52,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:33:52,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:33:52,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:33:52,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:33:52,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:33:52,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:33:52,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:33:52,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:33:52,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:33:52,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:33:52,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:33:52,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:33:52,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:33:52,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:33:52,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:33:52,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:33:52,298 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-23 02:33:52,322 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:33:52,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:33:52,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:33:52,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:33:52,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:33:52,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:33:52,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:33:52,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:33:52,325 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:33:52,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:33:52,325 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:33:52,326 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 02:33:52,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:33:52,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:33:52,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:33:52,326 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 02:33:52,327 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 02:33:52,327 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 02:33:52,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:33:52,327 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 02:33:52,328 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 02:33:52,328 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 02:33:52,328 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:33:52,328 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:33:52,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:33:52,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:33:52,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:33:52,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:33:52,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:33:52,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:33:52,330 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-23 02:33:52,330 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 02:33:52,330 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:33:52,330 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:33:52,331 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:33:52,331 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-23 02:33:52,331 INFO L138 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_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da [2022-11-23 02:33:52,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:33:52,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:33:52,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:33:52,772 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:33:52,773 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:33:52,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-11-23 02:33:55,990 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:33:56,261 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:33:56,262 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-11-23 02:33:56,271 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/data/9dea988f7/69cee3054bd040fb89d273ab57b5defd/FLAG5a1e87832 [2022-11-23 02:33:56,290 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/data/9dea988f7/69cee3054bd040fb89d273ab57b5defd [2022-11-23 02:33:56,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:33:56,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:33:56,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:33:56,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:33:56,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:33:56,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:33:56" (1/1) ... [2022-11-23 02:33:56,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c77ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:56, skipping insertion in model container [2022-11-23 02:33:56,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:33:56" (1/1) ... [2022-11-23 02:33:56,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:33:56,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:33:56,501 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2482,2495] [2022-11-23 02:33:56,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:33:56,526 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 02:33:56,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:33:56,543 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2482,2495] [2022-11-23 02:33:56,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:33:56,555 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:33:56,579 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2482,2495] [2022-11-23 02:33:56,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:33:56,622 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:33:56,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:56 WrapperNode [2022-11-23 02:33:56,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:33:56,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:33:56,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:33:56,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:33:56,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:56" (1/1) ... [2022-11-23 02:33:56,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:56" (1/1) ... [2022-11-23 02:33:56,714 INFO L138 Inliner]: procedures = 27, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 192 [2022-11-23 02:33:56,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:33:56,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:33:56,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:33:56,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:33:56,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:56" (1/1) ... [2022-11-23 02:33:56,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:56" (1/1) ... [2022-11-23 02:33:56,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:56" (1/1) ... [2022-11-23 02:33:56,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:56" (1/1) ... [2022-11-23 02:33:56,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:56" (1/1) ... [2022-11-23 02:33:56,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:56" (1/1) ... [2022-11-23 02:33:56,780 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:56" (1/1) ... [2022-11-23 02:33:56,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:56" (1/1) ... [2022-11-23 02:33:56,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:33:56,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:33:56,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:33:56,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:33:56,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:56" (1/1) ... [2022-11-23 02:33:56,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:33:56,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:33:56,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:33:56,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:33:56,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:33:56,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 02:33:56,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:33:56,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 02:33:56,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 02:33:56,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 02:33:56,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 02:33:56,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 02:33:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 02:33:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:33:56,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:33:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:33:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 02:33:56,945 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 02:33:57,061 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:33:57,063 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:33:57,712 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:33:57,723 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:33:57,724 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 02:33:57,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:33:57 BoogieIcfgContainer [2022-11-23 02:33:57,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:33:57,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:33:57,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:33:57,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:33:57,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:33:56" (1/3) ... [2022-11-23 02:33:57,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c637a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:33:57, skipping insertion in model container [2022-11-23 02:33:57,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:56" (2/3) ... [2022-11-23 02:33:57,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c637a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:33:57, skipping insertion in model container [2022-11-23 02:33:57,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:33:57" (3/3) ... [2022-11-23 02:33:57,735 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2022-11-23 02:33:57,755 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:33:57,755 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-23 02:33:57,756 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 02:33:57,914 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 02:33:57,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 284 transitions, 584 flow [2022-11-23 02:33:58,131 INFO L130 PetriNetUnfolder]: 21/282 cut-off events. [2022-11-23 02:33:58,132 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:33:58,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 282 events. 21/282 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 517 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 177. Up to 3 conditions per place. [2022-11-23 02:33:58,141 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 284 transitions, 584 flow [2022-11-23 02:33:58,158 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 263 places, 277 transitions, 566 flow [2022-11-23 02:33:58,161 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:33:58,179 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 263 places, 277 transitions, 566 flow [2022-11-23 02:33:58,182 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 263 places, 277 transitions, 566 flow [2022-11-23 02:33:58,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 277 transitions, 566 flow [2022-11-23 02:33:58,247 INFO L130 PetriNetUnfolder]: 21/277 cut-off events. [2022-11-23 02:33:58,248 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:33:58,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 277 events. 21/277 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 509 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 177. Up to 3 conditions per place. [2022-11-23 02:33:58,262 INFO L119 LiptonReduction]: Number of co-enabled transitions 9120 [2022-11-23 02:34:36,463 INFO L134 LiptonReduction]: Checked pairs total: 12114 [2022-11-23 02:34:36,463 INFO L136 LiptonReduction]: Total number of compositions: 336 [2022-11-23 02:34:36,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:34:36,512 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;@3415186f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:34:36,513 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2022-11-23 02:34:36,525 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-23 02:34:36,526 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:34:36,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:34:36,528 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 02:34:36,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:34:36,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:36,538 INFO L85 PathProgramCache]: Analyzing trace with hash 36042, now seen corresponding path program 1 times [2022-11-23 02:34:36,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:34:36,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776169640] [2022-11-23 02:34:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:34:36,552 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 [2022-11-23 02:34:36,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:34:36,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:34:36,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:34:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:34:36,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:34:36,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:36,832 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:34:36,833 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:34:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:34:36,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:34:36,877 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:34:36,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776169640] [2022-11-23 02:34:36,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776169640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:34:36,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:34:36,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:34:36,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783426069] [2022-11-23 02:34:36,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:34:36,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:34:36,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:34:36,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:34:36,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:34:37,326 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 620 [2022-11-23 02:34:37,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:37,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:34:37,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 620 [2022-11-23 02:34:37,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:34:38,435 INFO L130 PetriNetUnfolder]: 1609/2581 cut-off events. [2022-11-23 02:34:38,435 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-23 02:34:38,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5242 conditions, 2581 events. 1609/2581 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 14113 event pairs, 1358 based on Foata normal form. 0/851 useless extension candidates. Maximal degree in co-relation 2472. Up to 1293 conditions per place. [2022-11-23 02:34:38,452 INFO L137 encePairwiseOnDemand]: 609/620 looper letters, 87 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2022-11-23 02:34:38,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 91 transitions, 388 flow [2022-11-23 02:34:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:34:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:34:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 865 transitions. [2022-11-23 02:34:38,470 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4650537634408602 [2022-11-23 02:34:38,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 865 transitions. [2022-11-23 02:34:38,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 865 transitions. [2022-11-23 02:34:38,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:34:38,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 865 transitions. [2022-11-23 02:34:38,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:38,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:38,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:38,494 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 116 flow. Second operand 3 states and 865 transitions. [2022-11-23 02:34:38,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 91 transitions, 388 flow [2022-11-23 02:34:38,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 91 transitions, 372 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 02:34:38,503 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 130 flow [2022-11-23 02:34:38,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2022-11-23 02:34:38,509 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2022-11-23 02:34:38,509 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 130 flow [2022-11-23 02:34:38,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:38,510 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:34:38,510 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 02:34:38,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 02:34:38,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:34:38,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:34:38,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:38,723 INFO L85 PathProgramCache]: Analyzing trace with hash 36041, now seen corresponding path program 1 times [2022-11-23 02:34:38,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:34:38,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347024738] [2022-11-23 02:34:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:34:38,724 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 [2022-11-23 02:34:38,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:34:38,726 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:34:38,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:34:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:34:38,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 02:34:38,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:38,853 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:34:38,853 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:34:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:34:38,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:34:38,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:34:38,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347024738] [2022-11-23 02:34:38,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347024738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:34:38,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:34:38,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:34:38,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157941591] [2022-11-23 02:34:38,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:34:38,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:34:38,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:34:38,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:34:38,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:34:39,091 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 620 [2022-11-23 02:34:39,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:39,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:34:39,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 620 [2022-11-23 02:34:39,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:34:39,829 INFO L130 PetriNetUnfolder]: 1609/2577 cut-off events. [2022-11-23 02:34:39,829 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-23 02:34:39,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5201 conditions, 2577 events. 1609/2577 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 14074 event pairs, 1358 based on Foata normal form. 2/857 useless extension candidates. Maximal degree in co-relation 2589. Up to 2577 conditions per place. [2022-11-23 02:34:39,844 INFO L137 encePairwiseOnDemand]: 617/620 looper letters, 47 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2022-11-23 02:34:39,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 48 transitions, 222 flow [2022-11-23 02:34:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:34:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:34:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 809 transitions. [2022-11-23 02:34:39,848 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4349462365591398 [2022-11-23 02:34:39,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 809 transitions. [2022-11-23 02:34:39,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 809 transitions. [2022-11-23 02:34:39,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:34:39,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 809 transitions. [2022-11-23 02:34:39,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:39,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:39,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:39,857 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 130 flow. Second operand 3 states and 809 transitions. [2022-11-23 02:34:39,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 48 transitions, 222 flow [2022-11-23 02:34:39,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:34:39,860 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 120 flow [2022-11-23 02:34:39,861 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2022-11-23 02:34:39,862 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2022-11-23 02:34:39,863 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 120 flow [2022-11-23 02:34:39,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:39,864 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:34:39,864 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 02:34:39,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:34:40,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:34:40,075 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:34:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1124855, now seen corresponding path program 1 times [2022-11-23 02:34:40,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:34:40,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321405368] [2022-11-23 02:34:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:34:40,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:34:40,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:34:40,078 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:34:40,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:34:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:34:40,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 02:34:40,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:40,250 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:34:40,250 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:34:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:34:40,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:34:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:34:40,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:34:40,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321405368] [2022-11-23 02:34:40,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321405368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:34:40,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:34:40,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-23 02:34:40,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653307039] [2022-11-23 02:34:40,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:34:40,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 02:34:40,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:34:40,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 02:34:40,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 02:34:42,539 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 620 [2022-11-23 02:34:42,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 120 flow. Second operand has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:42,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:34:42,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 620 [2022-11-23 02:34:42,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:34:44,875 INFO L130 PetriNetUnfolder]: 2421/3876 cut-off events. [2022-11-23 02:34:44,876 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-23 02:34:44,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7820 conditions, 3876 events. 2421/3876 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 22731 event pairs, 2037 based on Foata normal form. 0/1285 useless extension candidates. Maximal degree in co-relation 7812. Up to 1292 conditions per place. [2022-11-23 02:34:44,901 INFO L137 encePairwiseOnDemand]: 611/620 looper letters, 122 selfloop transitions, 19 changer transitions 0/141 dead transitions. [2022-11-23 02:34:44,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 141 transitions, 614 flow [2022-11-23 02:34:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:34:44,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:34:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1611 transitions. [2022-11-23 02:34:44,907 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43306451612903224 [2022-11-23 02:34:44,908 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1611 transitions. [2022-11-23 02:34:44,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1611 transitions. [2022-11-23 02:34:44,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:34:44,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1611 transitions. [2022-11-23 02:34:44,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 268.5) internal successors, (1611), 6 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:44,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 620.0) internal successors, (4340), 7 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:44,924 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 620.0) internal successors, (4340), 7 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:44,924 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 120 flow. Second operand 6 states and 1611 transitions. [2022-11-23 02:34:44,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 141 transitions, 614 flow [2022-11-23 02:34:44,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 141 transitions, 613 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:34:44,931 INFO L231 Difference]: Finished difference. Result has 55 places, 63 transitions, 264 flow [2022-11-23 02:34:44,932 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=55, PETRI_TRANSITIONS=63} [2022-11-23 02:34:44,933 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2022-11-23 02:34:44,934 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 63 transitions, 264 flow [2022-11-23 02:34:44,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:44,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:34:44,938 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 02:34:44,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:34:45,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:34:45,149 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:34:45,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:45,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1128141, now seen corresponding path program 1 times [2022-11-23 02:34:45,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:34:45,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674098841] [2022-11-23 02:34:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:34:45,151 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 [2022-11-23 02:34:45,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:34:45,152 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:34:45,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:34:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:34:45,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 02:34:45,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:45,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:45,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:45,323 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 02:34:45,323 INFO L350 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 12 treesize of output 20 [2022-11-23 02:34:45,345 INFO L350 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 [2022-11-23 02:34:45,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:45,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 02:34:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:34:45,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:34:45,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:34:45,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674098841] [2022-11-23 02:34:45,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674098841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:34:45,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:34:45,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:34:45,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139308390] [2022-11-23 02:34:45,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:34:45,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:34:45,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:34:45,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:34:45,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:34:45,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 620 [2022-11-23 02:34:45,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 63 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 257.75) internal successors, (1031), 4 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:45,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:34:45,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 620 [2022-11-23 02:34:45,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:34:46,732 INFO L130 PetriNetUnfolder]: 1810/2968 cut-off events. [2022-11-23 02:34:46,733 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-23 02:34:46,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6059 conditions, 2968 events. 1810/2968 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 17061 event pairs, 1512 based on Foata normal form. 0/1102 useless extension candidates. Maximal degree in co-relation 6046. Up to 2968 conditions per place. [2022-11-23 02:34:46,750 INFO L137 encePairwiseOnDemand]: 617/620 looper letters, 58 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2022-11-23 02:34:46,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 362 flow [2022-11-23 02:34:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:34:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:34:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 816 transitions. [2022-11-23 02:34:46,753 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43870967741935485 [2022-11-23 02:34:46,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 816 transitions. [2022-11-23 02:34:46,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 816 transitions. [2022-11-23 02:34:46,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:34:46,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 816 transitions. [2022-11-23 02:34:46,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:46,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:46,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:46,762 INFO L175 Difference]: Start difference. First operand has 55 places, 63 transitions, 264 flow. Second operand 3 states and 816 transitions. [2022-11-23 02:34:46,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 362 flow [2022-11-23 02:34:46,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 59 transitions, 343 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-23 02:34:46,765 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 227 flow [2022-11-23 02:34:46,765 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2022-11-23 02:34:46,766 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2022-11-23 02:34:46,766 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 227 flow [2022-11-23 02:34:46,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 257.75) internal successors, (1031), 4 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:46,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:34:46,767 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 02:34:46,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:34:46,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:34:46,978 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:34:46,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:46,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1128142, now seen corresponding path program 1 times [2022-11-23 02:34:46,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:34:46,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589331075] [2022-11-23 02:34:46,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:34:46,979 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 [2022-11-23 02:34:46,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:34:46,981 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:34:46,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:34:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:34:47,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 02:34:47,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:47,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:47,139 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 02:34:47,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-23 02:34:47,204 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 02:34:47,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 02:34:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:34:47,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:34:47,242 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:34:47,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589331075] [2022-11-23 02:34:47,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589331075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:34:47,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:34:47,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:34:47,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501083334] [2022-11-23 02:34:47,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:34:47,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:34:47,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:34:47,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:34:47,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:34:47,563 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 620 [2022-11-23 02:34:47,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:47,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:34:47,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 620 [2022-11-23 02:34:47,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:34:48,273 INFO L130 PetriNetUnfolder]: 1199/2060 cut-off events. [2022-11-23 02:34:48,274 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-23 02:34:48,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4224 conditions, 2060 events. 1199/2060 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 11656 event pairs, 987 based on Foata normal form. 0/913 useless extension candidates. Maximal degree in co-relation 4210. Up to 2060 conditions per place. [2022-11-23 02:34:48,287 INFO L137 encePairwiseOnDemand]: 617/620 looper letters, 54 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2022-11-23 02:34:48,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 55 transitions, 317 flow [2022-11-23 02:34:48,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:34:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:34:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 814 transitions. [2022-11-23 02:34:48,290 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4376344086021505 [2022-11-23 02:34:48,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 814 transitions. [2022-11-23 02:34:48,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 814 transitions. [2022-11-23 02:34:48,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:34:48,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 814 transitions. [2022-11-23 02:34:48,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:48,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:48,298 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:48,298 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 227 flow. Second operand 3 states and 814 transitions. [2022-11-23 02:34:48,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 55 transitions, 317 flow [2022-11-23 02:34:48,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 55 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:34:48,300 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 208 flow [2022-11-23 02:34:48,301 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2022-11-23 02:34:48,302 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2022-11-23 02:34:48,302 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 208 flow [2022-11-23 02:34:48,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:48,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:34:48,303 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:34:48,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:34:48,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:34:48,514 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:34:48,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:48,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1084167524, now seen corresponding path program 1 times [2022-11-23 02:34:48,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:34:48,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062984691] [2022-11-23 02:34:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:34:48,515 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 [2022-11-23 02:34:48,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:34:48,517 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:34:48,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:34:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:34:48,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:34:48,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:48,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:48,678 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-23 02:34:48,678 INFO L350 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 12 treesize of output 23 [2022-11-23 02:34:48,696 INFO L350 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 39 treesize of output 37 [2022-11-23 02:34:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:48,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 02:34:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:34:48,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:34:48,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:34:48,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062984691] [2022-11-23 02:34:48,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062984691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:34:48,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:34:48,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:34:48,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530551692] [2022-11-23 02:34:48,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:34:48,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:34:48,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:34:48,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:34:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:34:49,450 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 620 [2022-11-23 02:34:49,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 256.25) internal successors, (1025), 4 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:49,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:34:49,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 620 [2022-11-23 02:34:49,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:34:50,119 INFO L130 PetriNetUnfolder]: 1133/1931 cut-off events. [2022-11-23 02:34:50,120 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-23 02:34:50,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3967 conditions, 1931 events. 1133/1931 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 10680 event pairs, 930 based on Foata normal form. 0/892 useless extension candidates. Maximal degree in co-relation 3952. Up to 1931 conditions per place. [2022-11-23 02:34:50,130 INFO L137 encePairwiseOnDemand]: 617/620 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-11-23 02:34:50,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 310 flow [2022-11-23 02:34:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:34:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:34:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 806 transitions. [2022-11-23 02:34:50,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2022-11-23 02:34:50,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 806 transitions. [2022-11-23 02:34:50,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 806 transitions. [2022-11-23 02:34:50,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:34:50,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 806 transitions. [2022-11-23 02:34:50,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:50,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:50,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:50,141 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 208 flow. Second operand 3 states and 806 transitions. [2022-11-23 02:34:50,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 310 flow [2022-11-23 02:34:50,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:34:50,143 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 205 flow [2022-11-23 02:34:50,143 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2022-11-23 02:34:50,144 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2022-11-23 02:34:50,144 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 205 flow [2022-11-23 02:34:50,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 256.25) internal successors, (1025), 4 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:50,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:34:50,145 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:34:50,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-23 02:34:50,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:34:50,357 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:34:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:50,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1084167526, now seen corresponding path program 1 times [2022-11-23 02:34:50,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:34:50,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063730742] [2022-11-23 02:34:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:34:50,358 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 [2022-11-23 02:34:50,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:34:50,359 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:34:50,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:34:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:34:50,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 02:34:50,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:50,485 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-23 02:34:50,486 INFO L350 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-23 02:34:50,520 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 02:34:50,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 02:34:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:34:50,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:34:50,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:34:50,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063730742] [2022-11-23 02:34:50,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063730742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:34:50,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:34:50,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:34:50,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167639915] [2022-11-23 02:34:50,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:34:50,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:34:50,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:34:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:34:50,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:34:50,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 620 [2022-11-23 02:34:50,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:50,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:34:50,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 620 [2022-11-23 02:34:50,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:34:51,267 INFO L130 PetriNetUnfolder]: 1067/1802 cut-off events. [2022-11-23 02:34:51,267 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-23 02:34:51,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3710 conditions, 1802 events. 1067/1802 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 9782 event pairs, 873 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 3694. Up to 1802 conditions per place. [2022-11-23 02:34:51,281 INFO L137 encePairwiseOnDemand]: 617/620 looper letters, 50 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2022-11-23 02:34:51,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 303 flow [2022-11-23 02:34:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:34:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:34:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 804 transitions. [2022-11-23 02:34:51,285 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.432258064516129 [2022-11-23 02:34:51,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 804 transitions. [2022-11-23 02:34:51,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 804 transitions. [2022-11-23 02:34:51,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:34:51,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 804 transitions. [2022-11-23 02:34:51,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:51,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:51,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:51,292 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 205 flow. Second operand 3 states and 804 transitions. [2022-11-23 02:34:51,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 303 flow [2022-11-23 02:34:51,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:34:51,295 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 202 flow [2022-11-23 02:34:51,295 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2022-11-23 02:34:51,297 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2022-11-23 02:34:51,297 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 202 flow [2022-11-23 02:34:51,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:51,298 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:34:51,298 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-23 02:34:51,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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)] Ended with exit code 0 [2022-11-23 02:34:51,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:34:51,509 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:34:51,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:51,510 INFO L85 PathProgramCache]: Analyzing trace with hash -841682934, now seen corresponding path program 2 times [2022-11-23 02:34:51,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:34:51,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903017867] [2022-11-23 02:34:51,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:34:51,511 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 [2022-11-23 02:34:51,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:34:51,512 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:34:51,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:34:51,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:34:51,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:34:51,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 02:34:51,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:51,678 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:34:51,679 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:34:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:34:51,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:34:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:34:52,534 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:34:52,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903017867] [2022-11-23 02:34:52,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903017867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:34:52,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:34:52,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-23 02:34:52,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014304196] [2022-11-23 02:34:52,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:34:52,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 02:34:52,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:34:52,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 02:34:52,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-23 02:34:59,413 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 620 [2022-11-23 02:34:59,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 202 flow. Second operand has 12 states, 12 states have (on average 247.0) internal successors, (2964), 12 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:59,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:34:59,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 620 [2022-11-23 02:34:59,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:35:03,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:35:05,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:35:07,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:35:09,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:35:11,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:35:13,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:35:19,897 INFO L130 PetriNetUnfolder]: 3543/5979 cut-off events. [2022-11-23 02:35:19,897 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2022-11-23 02:35:19,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12226 conditions, 5979 events. 3543/5979 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 37707 event pairs, 2910 based on Foata normal form. 10/2882 useless extension candidates. Maximal degree in co-relation 12209. Up to 980 conditions per place. [2022-11-23 02:35:19,931 INFO L137 encePairwiseOnDemand]: 613/620 looper letters, 315 selfloop transitions, 34 changer transitions 0/349 dead transitions. [2022-11-23 02:35:19,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 349 transitions, 1652 flow [2022-11-23 02:35:19,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 02:35:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-23 02:35:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4295 transitions. [2022-11-23 02:35:19,944 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4329637096774194 [2022-11-23 02:35:19,945 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4295 transitions. [2022-11-23 02:35:19,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4295 transitions. [2022-11-23 02:35:19,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:35:19,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4295 transitions. [2022-11-23 02:35:19,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 268.4375) internal successors, (4295), 16 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:19,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 620.0) internal successors, (10540), 17 states have internal predecessors, (10540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:19,972 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 620.0) internal successors, (10540), 17 states have internal predecessors, (10540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:19,972 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 202 flow. Second operand 16 states and 4295 transitions. [2022-11-23 02:35:19,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 349 transitions, 1652 flow [2022-11-23 02:35:19,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 349 transitions, 1651 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:35:19,981 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 464 flow [2022-11-23 02:35:19,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=464, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2022-11-23 02:35:19,984 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2022-11-23 02:35:19,985 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 464 flow [2022-11-23 02:35:19,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 247.0) internal successors, (2964), 12 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:20,002 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:35:20,002 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 02:35:20,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:35:20,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:35:20,213 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:35:20,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:35:20,214 INFO L85 PathProgramCache]: Analyzing trace with hash -750549808, now seen corresponding path program 1 times [2022-11-23 02:35:20,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:35:20,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700035206] [2022-11-23 02:35:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:35:20,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:35:20,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:35:20,216 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:35:20,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:35:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:35:20,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 02:35:20,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:35:20,316 INFO L350 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 [2022-11-23 02:35:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:35:20,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:35:20,411 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:35:20,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700035206] [2022-11-23 02:35:20,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700035206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:35:20,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:35:20,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:35:20,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882401326] [2022-11-23 02:35:20,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:35:20,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:35:20,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:35:20,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:35:20,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:35:21,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 620 [2022-11-23 02:35:21,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 464 flow. Second operand has 5 states, 5 states have (on average 251.2) internal successors, (1256), 5 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:21,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:35:21,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 620 [2022-11-23 02:35:21,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:35:23,142 INFO L130 PetriNetUnfolder]: 6603/11119 cut-off events. [2022-11-23 02:35:23,142 INFO L131 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-11-23 02:35:23,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22724 conditions, 11119 events. 6603/11119 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 80707 event pairs, 2910 based on Foata normal form. 0/5278 useless extension candidates. Maximal degree in co-relation 22696. Up to 5941 conditions per place. [2022-11-23 02:35:23,222 INFO L137 encePairwiseOnDemand]: 615/620 looper letters, 80 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2022-11-23 02:35:23,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 99 transitions, 719 flow [2022-11-23 02:35:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:35:23,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:35:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1315 transitions. [2022-11-23 02:35:23,227 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4241935483870968 [2022-11-23 02:35:23,227 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1315 transitions. [2022-11-23 02:35:23,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1315 transitions. [2022-11-23 02:35:23,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:35:23,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1315 transitions. [2022-11-23 02:35:23,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:23,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:23,237 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:23,237 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 464 flow. Second operand 5 states and 1315 transitions. [2022-11-23 02:35:23,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 99 transitions, 719 flow [2022-11-23 02:35:23,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 650 flow, removed 18 selfloop flow, removed 4 redundant places. [2022-11-23 02:35:23,243 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 441 flow [2022-11-23 02:35:23,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=441, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2022-11-23 02:35:23,245 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2022-11-23 02:35:23,245 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 441 flow [2022-11-23 02:35:23,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 251.2) internal successors, (1256), 5 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:23,246 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:35:23,246 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 02:35:23,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:35:23,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:35:23,458 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:35:23,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:35:23,458 INFO L85 PathProgramCache]: Analyzing trace with hash -750549807, now seen corresponding path program 1 times [2022-11-23 02:35:23,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:35:23,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063067363] [2022-11-23 02:35:23,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:35:23,459 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 [2022-11-23 02:35:23,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:35:23,461 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:35:23,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:35:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:35:23,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 02:35:23,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:35:23,535 INFO L350 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 [2022-11-23 02:35:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:35:23,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:35:23,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:35:23,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063067363] [2022-11-23 02:35:23,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063067363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:35:23,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:35:23,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:35:23,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909323432] [2022-11-23 02:35:23,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:35:23,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:35:23,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:35:23,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:35:23,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:35:23,889 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 620 [2022-11-23 02:35:23,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 441 flow. Second operand has 4 states, 4 states have (on average 245.5) internal successors, (982), 4 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:23,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:35:23,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 620 [2022-11-23 02:35:23,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:35:25,272 INFO L130 PetriNetUnfolder]: 4943/8339 cut-off events. [2022-11-23 02:35:25,272 INFO L131 PetriNetUnfolder]: For 1000/1000 co-relation queries the response was YES. [2022-11-23 02:35:25,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17805 conditions, 8339 events. 4943/8339 cut-off events. For 1000/1000 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 54638 event pairs, 4030 based on Foata normal form. 0/4739 useless extension candidates. Maximal degree in co-relation 17776. Up to 8301 conditions per place. [2022-11-23 02:35:25,318 INFO L137 encePairwiseOnDemand]: 615/620 looper letters, 63 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2022-11-23 02:35:25,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 70 transitions, 575 flow [2022-11-23 02:35:25,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:35:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:35:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1013 transitions. [2022-11-23 02:35:25,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40846774193548385 [2022-11-23 02:35:25,322 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1013 transitions. [2022-11-23 02:35:25,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1013 transitions. [2022-11-23 02:35:25,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:35:25,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1013 transitions. [2022-11-23 02:35:25,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 253.25) internal successors, (1013), 4 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:25,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 620.0) internal successors, (3100), 5 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:25,330 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 620.0) internal successors, (3100), 5 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:25,330 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 441 flow. Second operand 4 states and 1013 transitions. [2022-11-23 02:35:25,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 70 transitions, 575 flow [2022-11-23 02:35:25,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 70 transitions, 539 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 02:35:25,335 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 413 flow [2022-11-23 02:35:25,336 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=413, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2022-11-23 02:35:25,336 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 19 predicate places. [2022-11-23 02:35:25,336 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 413 flow [2022-11-23 02:35:25,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 245.5) internal successors, (982), 4 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:25,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:35:25,337 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 02:35:25,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:35:25,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:35:25,549 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:35:25,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:35:25,549 INFO L85 PathProgramCache]: Analyzing trace with hash -750549858, now seen corresponding path program 1 times [2022-11-23 02:35:25,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:35:25,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73736655] [2022-11-23 02:35:25,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:35:25,550 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 [2022-11-23 02:35:25,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:35:25,553 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:35:25,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:35:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:35:25,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:35:25,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:35:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:35:25,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:35:25,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:35:25,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73736655] [2022-11-23 02:35:25,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73736655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:35:25,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:35:25,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:35:25,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65650635] [2022-11-23 02:35:25,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:35:25,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:35:25,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:35:25,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:35:25,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:35:25,935 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 620 [2022-11-23 02:35:25,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 413 flow. Second operand has 5 states, 5 states have (on average 252.2) internal successors, (1261), 5 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:25,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:35:25,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 620 [2022-11-23 02:35:25,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:35:27,780 INFO L130 PetriNetUnfolder]: 5534/9514 cut-off events. [2022-11-23 02:35:27,780 INFO L131 PetriNetUnfolder]: For 902/902 co-relation queries the response was YES. [2022-11-23 02:35:27,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20281 conditions, 9514 events. 5534/9514 cut-off events. For 902/902 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 66230 event pairs, 4080 based on Foata normal form. 0/5594 useless extension candidates. Maximal degree in co-relation 20251. Up to 8338 conditions per place. [2022-11-23 02:35:27,833 INFO L137 encePairwiseOnDemand]: 613/620 looper letters, 109 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2022-11-23 02:35:27,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 113 transitions, 854 flow [2022-11-23 02:35:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:35:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:35:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1322 transitions. [2022-11-23 02:35:27,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4264516129032258 [2022-11-23 02:35:27,838 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1322 transitions. [2022-11-23 02:35:27,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1322 transitions. [2022-11-23 02:35:27,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:35:27,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1322 transitions. [2022-11-23 02:35:27,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 264.4) internal successors, (1322), 5 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:27,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:27,847 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:27,847 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 413 flow. Second operand 5 states and 1322 transitions. [2022-11-23 02:35:27,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 113 transitions, 854 flow [2022-11-23 02:35:27,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 113 transitions, 840 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:35:27,856 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 428 flow [2022-11-23 02:35:27,856 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=428, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2022-11-23 02:35:27,856 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 23 predicate places. [2022-11-23 02:35:27,857 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 428 flow [2022-11-23 02:35:27,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 252.2) internal successors, (1261), 5 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:27,857 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:35:27,857 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:35:27,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:35:28,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:35:28,068 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:35:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:35:28,069 INFO L85 PathProgramCache]: Analyzing trace with hash -231226549, now seen corresponding path program 1 times [2022-11-23 02:35:28,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:35:28,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606519826] [2022-11-23 02:35:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:35:28,070 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 [2022-11-23 02:35:28,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:35:28,071 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:35:28,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:35:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:35:28,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:35:28,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:35:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:35:28,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:35:28,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:35:28,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606519826] [2022-11-23 02:35:28,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606519826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:35:28,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:35:28,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:35:28,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933680698] [2022-11-23 02:35:28,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:35:28,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:35:28,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:35:28,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:35:28,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:35:28,593 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 620 [2022-11-23 02:35:28,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 428 flow. Second operand has 5 states, 5 states have (on average 252.4) internal successors, (1262), 5 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:28,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:35:28,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 620 [2022-11-23 02:35:28,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:35:30,316 INFO L130 PetriNetUnfolder]: 5100/8800 cut-off events. [2022-11-23 02:35:30,317 INFO L131 PetriNetUnfolder]: For 1979/1979 co-relation queries the response was YES. [2022-11-23 02:35:30,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19972 conditions, 8800 events. 5100/8800 cut-off events. For 1979/1979 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 60639 event pairs, 4096 based on Foata normal form. 14/5474 useless extension candidates. Maximal degree in co-relation 19940. Up to 8558 conditions per place. [2022-11-23 02:35:30,365 INFO L137 encePairwiseOnDemand]: 613/620 looper letters, 83 selfloop transitions, 15 changer transitions 0/98 dead transitions. [2022-11-23 02:35:30,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 98 transitions, 698 flow [2022-11-23 02:35:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:35:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:35:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1319 transitions. [2022-11-23 02:35:30,370 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42548387096774193 [2022-11-23 02:35:30,370 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1319 transitions. [2022-11-23 02:35:30,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1319 transitions. [2022-11-23 02:35:30,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:35:30,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1319 transitions. [2022-11-23 02:35:30,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 263.8) internal successors, (1319), 5 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:30,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:30,379 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:30,380 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 428 flow. Second operand 5 states and 1319 transitions. [2022-11-23 02:35:30,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 98 transitions, 698 flow [2022-11-23 02:35:30,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 692 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-23 02:35:30,387 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 503 flow [2022-11-23 02:35:30,387 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=503, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2022-11-23 02:35:30,388 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 29 predicate places. [2022-11-23 02:35:30,388 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 503 flow [2022-11-23 02:35:30,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 252.4) internal successors, (1262), 5 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:30,388 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:35:30,388 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:35:30,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-23 02:35:30,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:35:30,600 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:35:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:35:30,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1395690418, now seen corresponding path program 1 times [2022-11-23 02:35:30,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:35:30,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473529698] [2022-11-23 02:35:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:35:30,601 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 [2022-11-23 02:35:30,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:35:30,602 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:35:30,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-23 02:35:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:35:30,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 02:35:30,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:35:30,788 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:35:30,788 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:35:30,822 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 02:35:30,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 02:35:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:35:30,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:35:30,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:35:30,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473529698] [2022-11-23 02:35:30,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473529698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:35:30,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:35:30,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:35:30,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485713101] [2022-11-23 02:35:30,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:35:30,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:35:30,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:35:30,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:35:30,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:35:31,203 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 620 [2022-11-23 02:35:31,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 503 flow. Second operand has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:31,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:35:31,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 620 [2022-11-23 02:35:31,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:35:32,646 INFO L130 PetriNetUnfolder]: 3723/6471 cut-off events. [2022-11-23 02:35:32,647 INFO L131 PetriNetUnfolder]: For 2737/2737 co-relation queries the response was YES. [2022-11-23 02:35:32,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15519 conditions, 6471 events. 3723/6471 cut-off events. For 2737/2737 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 42477 event pairs, 2937 based on Foata normal form. 0/4479 useless extension candidates. Maximal degree in co-relation 15484. Up to 6458 conditions per place. [2022-11-23 02:35:32,674 INFO L137 encePairwiseOnDemand]: 615/620 looper letters, 59 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2022-11-23 02:35:32,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 71 transitions, 635 flow [2022-11-23 02:35:32,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:35:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:35:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1010 transitions. [2022-11-23 02:35:32,678 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2022-11-23 02:35:32,678 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1010 transitions. [2022-11-23 02:35:32,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1010 transitions. [2022-11-23 02:35:32,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:35:32,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1010 transitions. [2022-11-23 02:35:32,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 252.5) internal successors, (1010), 4 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:32,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 620.0) internal successors, (3100), 5 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:32,685 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 620.0) internal successors, (3100), 5 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:32,685 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 503 flow. Second operand 4 states and 1010 transitions. [2022-11-23 02:35:32,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 71 transitions, 635 flow [2022-11-23 02:35:32,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 71 transitions, 604 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-23 02:35:32,695 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 486 flow [2022-11-23 02:35:32,695 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=486, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2022-11-23 02:35:32,696 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 27 predicate places. [2022-11-23 02:35:32,696 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 486 flow [2022-11-23 02:35:32,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:32,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:35:32,697 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:35:32,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-23 02:35:32,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:35:32,908 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:35:32,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:35:32,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1395690419, now seen corresponding path program 1 times [2022-11-23 02:35:32,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:35:32,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769826786] [2022-11-23 02:35:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:35:32,909 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 [2022-11-23 02:35:32,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:35:32,910 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:35:32,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-23 02:35:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:35:33,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 02:35:33,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:35:33,160 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:35:33,161 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:35:33,230 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:35:33,230 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:35:33,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:35:33,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 02:35:33,364 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:35:33,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 02:35:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:35:33,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:35:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:35:34,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:35:34,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769826786] [2022-11-23 02:35:34,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769826786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:35:34,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:35:34,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-23 02:35:34,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727409202] [2022-11-23 02:35:34,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:35:34,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 02:35:34,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:35:34,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 02:35:34,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:35:40,743 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 620 [2022-11-23 02:35:40,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 486 flow. Second operand has 10 states, 10 states have (on average 233.6) internal successors, (2336), 10 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:40,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:35:40,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 620 [2022-11-23 02:35:40,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:35:52,277 INFO L130 PetriNetUnfolder]: 9459/16671 cut-off events. [2022-11-23 02:35:52,277 INFO L131 PetriNetUnfolder]: For 5242/5242 co-relation queries the response was YES. [2022-11-23 02:35:52,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39110 conditions, 16671 events. 9459/16671 cut-off events. For 5242/5242 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 130313 event pairs, 2486 based on Foata normal form. 0/12039 useless extension candidates. Maximal degree in co-relation 39075. Up to 2445 conditions per place. [2022-11-23 02:35:52,386 INFO L137 encePairwiseOnDemand]: 607/620 looper letters, 443 selfloop transitions, 90 changer transitions 0/533 dead transitions. [2022-11-23 02:35:52,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 533 transitions, 3039 flow [2022-11-23 02:35:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 02:35:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-23 02:35:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 8158 transitions. [2022-11-23 02:35:52,406 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39872922776148584 [2022-11-23 02:35:52,406 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 8158 transitions. [2022-11-23 02:35:52,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 8158 transitions. [2022-11-23 02:35:52,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:35:52,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 8158 transitions. [2022-11-23 02:35:52,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 247.21212121212122) internal successors, (8158), 33 states have internal predecessors, (8158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:52,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 620.0) internal successors, (21080), 34 states have internal predecessors, (21080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:52,453 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 620.0) internal successors, (21080), 34 states have internal predecessors, (21080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:52,453 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 486 flow. Second operand 33 states and 8158 transitions. [2022-11-23 02:35:52,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 533 transitions, 3039 flow [2022-11-23 02:35:52,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 533 transitions, 3026 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:35:52,484 INFO L231 Difference]: Finished difference. Result has 116 places, 138 transitions, 1148 flow [2022-11-23 02:35:52,484 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1148, PETRI_PLACES=116, PETRI_TRANSITIONS=138} [2022-11-23 02:35:52,484 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 62 predicate places. [2022-11-23 02:35:52,485 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 138 transitions, 1148 flow [2022-11-23 02:35:52,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 233.6) internal successors, (2336), 10 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:52,485 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:35:52,485 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:35:52,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-23 02:35:52,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:35:52,698 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:35:52,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:35:52,698 INFO L85 PathProgramCache]: Analyzing trace with hash 281439693, now seen corresponding path program 1 times [2022-11-23 02:35:52,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:35:52,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564787704] [2022-11-23 02:35:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:35:52,699 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 [2022-11-23 02:35:52,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:35:52,700 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:35:52,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-23 02:35:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:35:52,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 02:35:52,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:35:52,812 INFO L350 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 [2022-11-23 02:35:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:35:52,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:35:52,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:35:52,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564787704] [2022-11-23 02:35:52,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564787704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:35:52,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:35:52,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:35:52,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786153723] [2022-11-23 02:35:52,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:35:52,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:35:52,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:35:52,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:35:52,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:35:53,470 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 620 [2022-11-23 02:35:53,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 138 transitions, 1148 flow. Second operand has 5 states, 5 states have (on average 251.6) internal successors, (1258), 5 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:53,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:35:53,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 620 [2022-11-23 02:35:53,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:35:58,223 INFO L130 PetriNetUnfolder]: 14508/25478 cut-off events. [2022-11-23 02:35:58,223 INFO L131 PetriNetUnfolder]: For 32921/32921 co-relation queries the response was YES. [2022-11-23 02:35:58,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66519 conditions, 25478 events. 14508/25478 cut-off events. For 32921/32921 co-relation queries the response was YES. Maximal size of possible extension queue 1008. Compared 213942 event pairs, 7719 based on Foata normal form. 0/18586 useless extension candidates. Maximal degree in co-relation 66478. Up to 16591 conditions per place. [2022-11-23 02:35:58,384 INFO L137 encePairwiseOnDemand]: 615/620 looper letters, 178 selfloop transitions, 30 changer transitions 0/208 dead transitions. [2022-11-23 02:35:58,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 208 transitions, 2061 flow [2022-11-23 02:35:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:35:58,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:35:58,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1299 transitions. [2022-11-23 02:35:58,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4190322580645161 [2022-11-23 02:35:58,388 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1299 transitions. [2022-11-23 02:35:58,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1299 transitions. [2022-11-23 02:35:58,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:35:58,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1299 transitions. [2022-11-23 02:35:58,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 259.8) internal successors, (1299), 5 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:58,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:58,395 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:58,395 INFO L175 Difference]: Start difference. First operand has 116 places, 138 transitions, 1148 flow. Second operand 5 states and 1299 transitions. [2022-11-23 02:35:58,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 208 transitions, 2061 flow [2022-11-23 02:35:58,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 208 transitions, 1855 flow, removed 82 selfloop flow, removed 3 redundant places. [2022-11-23 02:35:58,591 INFO L231 Difference]: Finished difference. Result has 118 places, 139 transitions, 1080 flow [2022-11-23 02:35:58,591 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1080, PETRI_PLACES=118, PETRI_TRANSITIONS=139} [2022-11-23 02:35:58,592 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2022-11-23 02:35:58,592 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 139 transitions, 1080 flow [2022-11-23 02:35:58,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 251.6) internal successors, (1258), 5 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:58,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:35:58,593 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:35:58,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-23 02:35:58,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:35:58,798 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:35:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:35:58,799 INFO L85 PathProgramCache]: Analyzing trace with hash 281439507, now seen corresponding path program 1 times [2022-11-23 02:35:58,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:35:58,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077466848] [2022-11-23 02:35:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:35:58,799 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 [2022-11-23 02:35:58,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:35:58,808 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:35:58,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-23 02:35:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:35:58,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:35:58,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:35:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:35:58,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:35:58,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:35:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077466848] [2022-11-23 02:35:58,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077466848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:35:58,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:35:58,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:35:58,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316087917] [2022-11-23 02:35:58,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:35:58,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:35:58,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:35:58,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:35:58,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:35:59,227 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 620 [2022-11-23 02:35:59,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 139 transitions, 1080 flow. Second operand has 5 states, 5 states have (on average 252.6) internal successors, (1263), 5 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:35:59,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:35:59,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 620 [2022-11-23 02:35:59,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:36:04,016 INFO L130 PetriNetUnfolder]: 13978/24528 cut-off events. [2022-11-23 02:36:04,017 INFO L131 PetriNetUnfolder]: For 27773/27773 co-relation queries the response was YES. [2022-11-23 02:36:04,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67990 conditions, 24528 events. 13978/24528 cut-off events. For 27773/27773 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 199792 event pairs, 11868 based on Foata normal form. 80/20324 useless extension candidates. Maximal degree in co-relation 67949. Up to 23942 conditions per place. [2022-11-23 02:36:04,214 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 171 selfloop transitions, 4 changer transitions 0/175 dead transitions. [2022-11-23 02:36:04,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 175 transitions, 1667 flow [2022-11-23 02:36:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:36:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:36:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1309 transitions. [2022-11-23 02:36:04,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.422258064516129 [2022-11-23 02:36:04,219 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1309 transitions. [2022-11-23 02:36:04,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1309 transitions. [2022-11-23 02:36:04,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:36:04,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1309 transitions. [2022-11-23 02:36:04,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 261.8) internal successors, (1309), 5 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:36:04,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:36:04,227 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:36:04,227 INFO L175 Difference]: Start difference. First operand has 118 places, 139 transitions, 1080 flow. Second operand 5 states and 1309 transitions. [2022-11-23 02:36:04,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 175 transitions, 1667 flow [2022-11-23 02:36:04,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 175 transitions, 1594 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 02:36:04,377 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1043 flow [2022-11-23 02:36:04,378 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1043, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2022-11-23 02:36:04,378 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 67 predicate places. [2022-11-23 02:36:04,378 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1043 flow [2022-11-23 02:36:04,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 252.6) internal successors, (1263), 5 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:36:04,379 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:36:04,379 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:36:04,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-23 02:36:04,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:36:04,591 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:36:04,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:36:04,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1134933120, now seen corresponding path program 1 times [2022-11-23 02:36:04,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:36:04,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203521247] [2022-11-23 02:36:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:36:04,592 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 [2022-11-23 02:36:04,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:36:04,593 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:36:04,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-23 02:36:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:36:04,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:36:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:36:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:36:04,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:36:04,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:36:04,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203521247] [2022-11-23 02:36:04,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203521247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:36:04,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:36:04,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:36:04,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666020582] [2022-11-23 02:36:04,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:36:04,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:36:04,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:36:04,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:36:04,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:36:05,074 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 620 [2022-11-23 02:36:05,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 1043 flow. Second operand has 5 states, 5 states have (on average 252.8) internal successors, (1264), 5 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:36:05,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:36:05,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 620 [2022-11-23 02:36:05,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:36:10,144 INFO L130 PetriNetUnfolder]: 13819/24243 cut-off events. [2022-11-23 02:36:10,144 INFO L131 PetriNetUnfolder]: For 32562/32562 co-relation queries the response was YES. [2022-11-23 02:36:10,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70568 conditions, 24243 events. 13819/24243 cut-off events. For 32562/32562 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 198078 event pairs, 11841 based on Foata normal form. 48/22239 useless extension candidates. Maximal degree in co-relation 70524. Up to 24005 conditions per place. [2022-11-23 02:36:10,342 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 143 selfloop transitions, 17 changer transitions 0/160 dead transitions. [2022-11-23 02:36:10,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 160 transitions, 1454 flow [2022-11-23 02:36:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:36:10,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:36:10,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1306 transitions. [2022-11-23 02:36:10,345 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42129032258064514 [2022-11-23 02:36:10,345 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1306 transitions. [2022-11-23 02:36:10,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1306 transitions. [2022-11-23 02:36:10,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:36:10,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1306 transitions. [2022-11-23 02:36:10,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 261.2) internal successors, (1306), 5 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:36:10,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:36:10,351 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:36:10,351 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1043 flow. Second operand 5 states and 1306 transitions. [2022-11-23 02:36:10,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 160 transitions, 1454 flow [2022-11-23 02:36:10,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 160 transitions, 1449 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:36:10,512 INFO L231 Difference]: Finished difference. Result has 125 places, 142 transitions, 1099 flow [2022-11-23 02:36:10,513 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1099, PETRI_PLACES=125, PETRI_TRANSITIONS=142} [2022-11-23 02:36:10,513 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 71 predicate places. [2022-11-23 02:36:10,514 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 142 transitions, 1099 flow [2022-11-23 02:36:10,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 252.8) internal successors, (1264), 5 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:36:10,514 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:36:10,514 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1] [2022-11-23 02:36:10,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-23 02:36:10,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:36:10,726 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:36:10,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:36:10,727 INFO L85 PathProgramCache]: Analyzing trace with hash -702435841, now seen corresponding path program 1 times [2022-11-23 02:36:10,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:36:10,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118347233] [2022-11-23 02:36:10,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:36:10,728 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 [2022-11-23 02:36:10,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:36:10,729 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:36:10,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-23 02:36:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:36:10,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 02:36:10,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:36:10,864 INFO L350 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 [2022-11-23 02:36:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:36:11,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:36:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:36:13,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:36:13,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118347233] [2022-11-23 02:36:13,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118347233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:36:13,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:36:13,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-23 02:36:13,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104385835] [2022-11-23 02:36:13,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:36:13,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 02:36:13,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:36:13,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 02:36:13,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-23 02:36:31,860 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 620 [2022-11-23 02:36:31,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 142 transitions, 1099 flow. Second operand has 18 states, 18 states have (on average 247.05555555555554) internal successors, (4447), 18 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:36:31,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:36:31,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 620 [2022-11-23 02:36:31,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:36:36,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:36:38,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:36:40,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:36:42,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:36:44,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:36:46,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:36:48,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:37:06,473 INFO L130 PetriNetUnfolder]: 22957/40213 cut-off events. [2022-11-23 02:37:06,473 INFO L131 PetriNetUnfolder]: For 79147/79147 co-relation queries the response was YES. [2022-11-23 02:37:06,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124245 conditions, 40213 events. 22957/40213 cut-off events. For 79147/79147 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 339044 event pairs, 19791 based on Foata normal form. 32/36825 useless extension candidates. Maximal degree in co-relation 124200. Up to 6171 conditions per place. [2022-11-23 02:37:06,823 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 650 selfloop transitions, 48 changer transitions 0/698 dead transitions. [2022-11-23 02:37:06,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 698 transitions, 5587 flow [2022-11-23 02:37:06,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 02:37:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 02:37:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4852 transitions. [2022-11-23 02:37:06,829 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43476702508960574 [2022-11-23 02:37:06,829 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4852 transitions. [2022-11-23 02:37:06,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4852 transitions. [2022-11-23 02:37:06,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:37:06,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4852 transitions. [2022-11-23 02:37:06,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 269.55555555555554) internal successors, (4852), 18 states have internal predecessors, (4852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:06,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 620.0) internal successors, (11780), 19 states have internal predecessors, (11780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:06,843 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 620.0) internal successors, (11780), 19 states have internal predecessors, (11780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:06,843 INFO L175 Difference]: Start difference. First operand has 125 places, 142 transitions, 1099 flow. Second operand 18 states and 4852 transitions. [2022-11-23 02:37:06,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 698 transitions, 5587 flow [2022-11-23 02:37:07,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 698 transitions, 5550 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-23 02:37:07,395 INFO L231 Difference]: Finished difference. Result has 149 places, 151 transitions, 1318 flow [2022-11-23 02:37:07,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1318, PETRI_PLACES=149, PETRI_TRANSITIONS=151} [2022-11-23 02:37:07,395 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 95 predicate places. [2022-11-23 02:37:07,396 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 151 transitions, 1318 flow [2022-11-23 02:37:07,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 247.05555555555554) internal successors, (4447), 18 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:07,396 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:37:07,396 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:37:07,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-11-23 02:37:07,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:37:07,597 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:37:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:37:07,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1234042663, now seen corresponding path program 1 times [2022-11-23 02:37:07,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:37:07,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851441195] [2022-11-23 02:37:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:37:07,598 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 [2022-11-23 02:37:07,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:37:07,599 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:37:07,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-23 02:37:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:37:07,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 02:37:07,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:37:07,905 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:37:07,906 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:37:07,975 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:37:07,976 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:37:08,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:37:08,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 02:37:08,203 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:37:08,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 02:37:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:37:08,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:37:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:37:10,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:37:10,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851441195] [2022-11-23 02:37:10,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851441195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:37:10,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:37:10,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-23 02:37:10,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164473081] [2022-11-23 02:37:10,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:37:10,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 02:37:10,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:37:10,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 02:37:10,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:37:18,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 620 [2022-11-23 02:37:18,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 151 transitions, 1318 flow. Second operand has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:18,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:37:18,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 620 [2022-11-23 02:37:18,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:37:41,042 INFO L130 PetriNetUnfolder]: 21277/37393 cut-off events. [2022-11-23 02:37:41,042 INFO L131 PetriNetUnfolder]: For 75765/75765 co-relation queries the response was YES. [2022-11-23 02:37:41,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115295 conditions, 37393 events. 21277/37393 cut-off events. For 75765/75765 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 316705 event pairs, 12615 based on Foata normal form. 1140/35233 useless extension candidates. Maximal degree in co-relation 115240. Up to 10670 conditions per place. [2022-11-23 02:37:41,436 INFO L137 encePairwiseOnDemand]: 609/620 looper letters, 513 selfloop transitions, 72 changer transitions 0/585 dead transitions. [2022-11-23 02:37:41,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 585 transitions, 4502 flow [2022-11-23 02:37:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 02:37:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-23 02:37:41,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 8140 transitions. [2022-11-23 02:37:41,445 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2022-11-23 02:37:41,445 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 8140 transitions. [2022-11-23 02:37:41,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 8140 transitions. [2022-11-23 02:37:41,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:37:41,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 8140 transitions. [2022-11-23 02:37:41,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 246.66666666666666) internal successors, (8140), 33 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:41,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 620.0) internal successors, (21080), 34 states have internal predecessors, (21080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:41,468 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 620.0) internal successors, (21080), 34 states have internal predecessors, (21080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:41,469 INFO L175 Difference]: Start difference. First operand has 149 places, 151 transitions, 1318 flow. Second operand 33 states and 8140 transitions. [2022-11-23 02:37:41,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 585 transitions, 4502 flow [2022-11-23 02:37:42,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 585 transitions, 4379 flow, removed 18 selfloop flow, removed 9 redundant places. [2022-11-23 02:37:42,113 INFO L231 Difference]: Finished difference. Result has 178 places, 177 transitions, 1602 flow [2022-11-23 02:37:42,113 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1602, PETRI_PLACES=178, PETRI_TRANSITIONS=177} [2022-11-23 02:37:42,114 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 124 predicate places. [2022-11-23 02:37:42,114 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 177 transitions, 1602 flow [2022-11-23 02:37:42,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:42,114 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:37:42,115 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:37:42,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-23 02:37:42,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:37:42,327 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:37:42,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:37:42,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1228771994, now seen corresponding path program 1 times [2022-11-23 02:37:42,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:37:42,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179734825] [2022-11-23 02:37:42,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:37:42,327 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 [2022-11-23 02:37:42,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:37:42,328 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:37:42,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-23 02:37:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:37:42,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 02:37:42,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:37:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:37:42,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:37:42,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:37:42,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179734825] [2022-11-23 02:37:42,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179734825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:37:42,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:37:42,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 02:37:42,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842326982] [2022-11-23 02:37:42,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:37:42,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 02:37:42,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:37:42,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 02:37:42,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 02:37:43,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 620 [2022-11-23 02:37:43,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 177 transitions, 1602 flow. Second operand has 6 states, 6 states have (on average 249.66666666666666) internal successors, (1498), 6 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:43,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:37:43,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 620 [2022-11-23 02:37:43,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:37:52,295 INFO L130 PetriNetUnfolder]: 22987/40483 cut-off events. [2022-11-23 02:37:52,295 INFO L131 PetriNetUnfolder]: For 179244/179244 co-relation queries the response was YES. [2022-11-23 02:37:52,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148688 conditions, 40483 events. 22987/40483 cut-off events. For 179244/179244 co-relation queries the response was YES. Maximal size of possible extension queue 1140. Compared 349869 event pairs, 10373 based on Foata normal form. 0/39733 useless extension candidates. Maximal degree in co-relation 148626. Up to 22059 conditions per place. [2022-11-23 02:37:52,763 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 241 selfloop transitions, 44 changer transitions 0/285 dead transitions. [2022-11-23 02:37:52,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 285 transitions, 2990 flow [2022-11-23 02:37:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:37:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:37:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1307 transitions. [2022-11-23 02:37:52,765 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42161290322580647 [2022-11-23 02:37:52,765 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1307 transitions. [2022-11-23 02:37:52,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1307 transitions. [2022-11-23 02:37:52,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:37:52,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1307 transitions. [2022-11-23 02:37:52,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 261.4) internal successors, (1307), 5 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:52,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:52,768 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:52,768 INFO L175 Difference]: Start difference. First operand has 178 places, 177 transitions, 1602 flow. Second operand 5 states and 1307 transitions. [2022-11-23 02:37:52,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 285 transitions, 2990 flow [2022-11-23 02:37:54,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 285 transitions, 2791 flow, removed 76 selfloop flow, removed 6 redundant places. [2022-11-23 02:37:54,374 INFO L231 Difference]: Finished difference. Result has 178 places, 197 transitions, 1807 flow [2022-11-23 02:37:54,375 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1807, PETRI_PLACES=178, PETRI_TRANSITIONS=197} [2022-11-23 02:37:54,375 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 124 predicate places. [2022-11-23 02:37:54,375 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 197 transitions, 1807 flow [2022-11-23 02:37:54,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 249.66666666666666) internal successors, (1498), 6 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:54,376 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:37:54,376 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:37:54,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-23 02:37:54,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:37:54,588 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 02:37:54,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:37:54,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1228779167, now seen corresponding path program 1 times [2022-11-23 02:37:54,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:37:54,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624499261] [2022-11-23 02:37:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:37:54,588 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 [2022-11-23 02:37:54,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:37:54,589 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:37:54,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_178d7440-b1b1-42c8-a76d-cd19764cdc65/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-23 02:37:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:37:54,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 02:37:54,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:37:54,720 INFO L350 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 [2022-11-23 02:37:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:37:54,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:37:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:37:55,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:37:55,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624499261] [2022-11-23 02:37:55,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624499261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:37:55,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:37:55,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-23 02:37:55,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207159248] [2022-11-23 02:37:55,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:37:55,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 02:37:55,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:37:55,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 02:37:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-23 02:38:01,415 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 620 [2022-11-23 02:38:01,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 197 transitions, 1807 flow. Second operand has 12 states, 12 states have (on average 244.5) internal successors, (2934), 12 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:38:01,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:38:01,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 620 [2022-11-23 02:38:01,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand