./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8 --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 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 --- 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-2329fc7 [2022-12-13 13:15:33,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:15:33,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:15:33,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:15:33,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:15:33,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:15:33,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:15:33,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:15:33,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:15:33,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:15:33,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:15:33,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:15:33,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:15:33,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:15:33,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:15:33,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:15:33,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:15:33,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:15:33,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:15:33,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:15:33,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:15:33,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:15:33,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:15:33,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:15:33,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:15:33,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:15:33,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:15:33,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:15:33,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:15:33,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:15:33,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:15:33,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:15:33,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:15:33,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:15:33,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:15:33,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:15:33,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:15:33,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:15:33,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:15:33,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:15:33,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:15:33,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 13:15:33,093 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:15:33,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:15:33,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:15:33,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:15:33,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:15:33,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:15:33,096 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:15:33,096 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:15:33,096 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:15:33,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:15:33,096 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:15:33,097 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:15:33,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:15:33,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:15:33,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:15:33,097 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:15:33,098 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:15:33,098 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:15:33,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:15:33,098 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:15:33,098 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:15:33,098 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:15:33,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:15:33,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:15:33,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:15:33,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:15:33,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:15:33,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:15:33,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:15:33,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:15:33,100 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:15:33,101 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:15:33,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:15:33,101 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:15:33,101 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_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 [2022-12-13 13:15:33,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:15:33,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:15:33,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:15:33,324 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:15:33,325 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:15:33,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-12-13 13:15:35,933 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:15:36,098 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:15:36,098 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-12-13 13:15:36,103 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/data/2ed8ce912/70849e781f6d4cf89810fb55096d66fd/FLAG64bed3215 [2022-12-13 13:15:36,512 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/data/2ed8ce912/70849e781f6d4cf89810fb55096d66fd [2022-12-13 13:15:36,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:15:36,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:15:36,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:15:36,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:15:36,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:15:36,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:15:36" (1/1) ... [2022-12-13 13:15:36,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4335cf38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:36, skipping insertion in model container [2022-12-13 13:15:36,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:15:36" (1/1) ... [2022-12-13 13:15:36,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:15:36,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:15:36,635 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:15:36,636 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:15:36,638 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:15:36,639 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:15:36,640 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:15:36,640 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:15:36,645 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_8b50163c-3fff-4e83-8223-0351ce9797be/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-12-13 13:15:36,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:15:36,659 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) [2022-12-13 13:15:36,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7d662004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:36, skipping insertion in model container [2022-12-13 13:15:36,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:15:36,660 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 13:15:36,661 INFO L158 Benchmark]: Toolchain (without parser) took 145.61ms. Allocated memory is still 138.4MB. Free memory was 102.0MB in the beginning and 92.1MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 13:15:36,661 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 138.4MB. Free memory is still 81.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:15:36,662 INFO L158 Benchmark]: CACSL2BoogieTranslator took 144.16ms. Allocated memory is still 138.4MB. Free memory was 101.5MB in the beginning and 92.1MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 13:15:36,663 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 138.4MB. Free memory is still 81.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 144.16ms. Allocated memory is still 138.4MB. Free memory was 101.5MB in the beginning and 92.1MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 107]: 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_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8 --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 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 --- 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-2329fc7 [2022-12-13 13:15:38,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:15:38,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:15:38,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:15:38,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:15:38,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:15:38,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:15:38,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:15:38,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:15:38,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:15:38,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:15:38,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:15:38,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:15:38,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:15:38,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:15:38,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:15:38,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:15:38,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:15:38,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:15:38,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:15:38,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:15:38,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:15:38,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:15:38,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:15:38,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:15:38,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:15:38,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:15:38,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:15:38,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:15:38,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:15:38,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:15:38,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:15:38,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:15:38,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:15:38,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:15:38,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:15:38,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:15:38,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:15:38,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:15:38,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:15:38,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:15:38,133 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 13:15:38,150 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:15:38,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:15:38,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:15:38,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:15:38,151 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:15:38,151 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:15:38,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:15:38,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:15:38,152 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:15:38,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:15:38,152 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:15:38,152 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:15:38,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:15:38,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:15:38,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:15:38,153 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:15:38,153 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:15:38,153 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:15:38,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:15:38,154 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:15:38,154 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 13:15:38,154 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 13:15:38,154 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:15:38,154 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:15:38,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:15:38,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:15:38,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:15:38,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:15:38,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:15:38,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:15:38,156 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 13:15:38,156 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 13:15:38,156 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:15:38,156 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:15:38,156 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:15:38,156 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 13:15:38,157 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:15:38,157 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_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 [2022-12-13 13:15:38,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:15:38,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:15:38,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:15:38,382 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:15:38,382 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:15:38,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-12-13 13:15:40,974 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:15:41,147 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:15:41,147 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-12-13 13:15:41,155 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/data/f0ba74f87/255b70a128554160906bcb079b14aa3f/FLAGfe6880232 [2022-12-13 13:15:41,518 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/data/f0ba74f87/255b70a128554160906bcb079b14aa3f [2022-12-13 13:15:41,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:15:41,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:15:41,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:15:41,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:15:41,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:15:41,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:15:41" (1/1) ... [2022-12-13 13:15:41,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36379ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:41, skipping insertion in model container [2022-12-13 13:15:41,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:15:41" (1/1) ... [2022-12-13 13:15:41,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:15:41,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:15:41,655 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:15:41,656 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:15:41,659 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:15:41,660 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:15:41,661 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:15:41,661 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:15:41,667 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_8b50163c-3fff-4e83-8223-0351ce9797be/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-12-13 13:15:41,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:15:41,685 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 13:15:41,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:15:41,691 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:15:41,692 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:15:41,693 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:15:41,694 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:15:41,694 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:15:41,695 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:15:41,698 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_8b50163c-3fff-4e83-8223-0351ce9797be/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-12-13 13:15:41,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:15:41,704 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:15:41,714 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:15:41,715 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:15:41,716 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:15:41,717 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:15:41,718 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:15:41,718 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:15:41,721 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_8b50163c-3fff-4e83-8223-0351ce9797be/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-12-13 13:15:41,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:15:41,736 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:15:41,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:41 WrapperNode [2022-12-13 13:15:41,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:15:41,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:15:41,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:15:41,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:15:41,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:41" (1/1) ... [2022-12-13 13:15:41,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:41" (1/1) ... [2022-12-13 13:15:41,765 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2022-12-13 13:15:41,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:15:41,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:15:41,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:15:41,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:15:41,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:41" (1/1) ... [2022-12-13 13:15:41,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:41" (1/1) ... [2022-12-13 13:15:41,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:41" (1/1) ... [2022-12-13 13:15:41,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:41" (1/1) ... [2022-12-13 13:15:41,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:41" (1/1) ... [2022-12-13 13:15:41,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:41" (1/1) ... [2022-12-13 13:15:41,785 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:41" (1/1) ... [2022-12-13 13:15:41,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:41" (1/1) ... [2022-12-13 13:15:41,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:15:41,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:15:41,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:15:41,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:15:41,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:41" (1/1) ... [2022-12-13 13:15:41,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:15:41,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:15:41,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:15:41,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:15:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:15:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 13:15:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:15:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 13:15:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 13:15:41,854 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 13:15:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 13:15:41,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 13:15:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 13:15:41,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 13:15:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 13:15:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 13:15:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 13:15:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:15:41,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:15:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:15:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 13:15:41,856 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 13:15:41,943 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:15:41,945 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:15:42,344 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:15:42,417 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:15:42,417 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 13:15:42,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:15:42 BoogieIcfgContainer [2022-12-13 13:15:42,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:15:42,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:15:42,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:15:42,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:15:42,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:15:41" (1/3) ... [2022-12-13 13:15:42,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9ca93f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:15:42, skipping insertion in model container [2022-12-13 13:15:42,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:15:41" (2/3) ... [2022-12-13 13:15:42,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9ca93f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:15:42, skipping insertion in model container [2022-12-13 13:15:42,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:15:42" (3/3) ... [2022-12-13 13:15:42,427 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-le-max.wvr.c [2022-12-13 13:15:42,444 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:15:42,444 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-13 13:15:42,444 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:15:42,508 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 13:15:42,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 177 transitions, 378 flow [2022-12-13 13:15:42,602 INFO L130 PetriNetUnfolder]: 10/174 cut-off events. [2022-12-13 13:15:42,603 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 13:15:42,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 174 events. 10/174 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-12-13 13:15:42,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 177 transitions, 378 flow [2022-12-13 13:15:42,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 169 transitions, 356 flow [2022-12-13 13:15:42,613 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:15:42,620 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 169 transitions, 356 flow [2022-12-13 13:15:42,622 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 169 transitions, 356 flow [2022-12-13 13:15:42,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 169 transitions, 356 flow [2022-12-13 13:15:42,648 INFO L130 PetriNetUnfolder]: 10/169 cut-off events. [2022-12-13 13:15:42,648 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 13:15:42,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 169 events. 10/169 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 176 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-12-13 13:15:42,650 INFO L119 LiptonReduction]: Number of co-enabled transitions 1742 [2022-12-13 13:16:02,945 INFO L134 LiptonReduction]: Checked pairs total: 2591 [2022-12-13 13:16:02,945 INFO L136 LiptonReduction]: Total number of compositions: 177 [2022-12-13 13:16:02,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:16:02,960 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;@4bd0ef74, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:16:02,960 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-12-13 13:16:02,962 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 13:16:02,963 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:16:02,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:02,963 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:16:02,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:02,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:02,968 INFO L85 PathProgramCache]: Analyzing trace with hash 21761, now seen corresponding path program 1 times [2022-12-13 13:16:02,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:02,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870968511] [2022-12-13 13:16:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:02,980 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 [2022-12-13 13:16:02,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:02,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:02,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:03,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:16:03,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:03,161 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 13:16:03,162 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 13:16:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:03,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:16:03,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:03,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870968511] [2022-12-13 13:16:03,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870968511] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:16:03,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:16:03,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:16:03,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752774824] [2022-12-13 13:16:03,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:16:03,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:16:03,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:03,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:16:03,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:16:03,334 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 354 [2022-12-13 13:16:03,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:03,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:03,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 354 [2022-12-13 13:16:03,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:03,638 INFO L130 PetriNetUnfolder]: 1088/1464 cut-off events. [2022-12-13 13:16:03,638 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-12-13 13:16:03,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3002 conditions, 1464 events. 1088/1464 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 5989 event pairs, 581 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 2690. Up to 1458 conditions per place. [2022-12-13 13:16:03,650 INFO L137 encePairwiseOnDemand]: 344/354 looper letters, 37 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-12-13 13:16:03,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 40 transitions, 174 flow [2022-12-13 13:16:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:16:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:16:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2022-12-13 13:16:03,664 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.467984934086629 [2022-12-13 13:16:03,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2022-12-13 13:16:03,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2022-12-13 13:16:03,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:03,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2022-12-13 13:16:03,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:03,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:03,680 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:03,682 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 116 flow. Second operand 3 states and 497 transitions. [2022-12-13 13:16:03,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 40 transitions, 174 flow [2022-12-13 13:16:03,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 13:16:03,689 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 88 flow [2022-12-13 13:16:03,691 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2022-12-13 13:16:03,695 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -13 predicate places. [2022-12-13 13:16:03,695 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 88 flow [2022-12-13 13:16:03,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:03,695 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:03,696 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:16:03,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:03,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:03,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:03,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:03,897 INFO L85 PathProgramCache]: Analyzing trace with hash 21880, now seen corresponding path program 1 times [2022-12-13 13:16:03,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:03,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005824367] [2022-12-13 13:16:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:03,899 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 [2022-12-13 13:16:03,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:03,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:03,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:04,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 13:16:04,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:04,200 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:16:04,200 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:16:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:04,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:16:04,225 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:04,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005824367] [2022-12-13 13:16:04,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005824367] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:16:04,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:16:04,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:16:04,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750754475] [2022-12-13 13:16:04,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:16:04,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:16:04,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:04,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:16:04,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:16:04,380 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 354 [2022-12-13 13:16:04,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:04,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:04,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 354 [2022-12-13 13:16:04,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:04,616 INFO L130 PetriNetUnfolder]: 1088/1463 cut-off events. [2022-12-13 13:16:04,616 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 13:16:04,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2955 conditions, 1463 events. 1088/1463 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 5986 event pairs, 581 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 2949. Up to 1457 conditions per place. [2022-12-13 13:16:04,623 INFO L137 encePairwiseOnDemand]: 352/354 looper letters, 36 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2022-12-13 13:16:04,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 160 flow [2022-12-13 13:16:04,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:16:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:16:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2022-12-13 13:16:04,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4566854990583804 [2022-12-13 13:16:04,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2022-12-13 13:16:04,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2022-12-13 13:16:04,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:04,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2022-12-13 13:16:04,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:04,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:04,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:04,631 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 88 flow. Second operand 3 states and 485 transitions. [2022-12-13 13:16:04,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 160 flow [2022-12-13 13:16:04,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:16:04,631 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 87 flow [2022-12-13 13:16:04,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2022-12-13 13:16:04,632 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -13 predicate places. [2022-12-13 13:16:04,632 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 87 flow [2022-12-13 13:16:04,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:04,632 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:04,633 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:16:04,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 13:16:04,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:04,833 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:04,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:04,834 INFO L85 PathProgramCache]: Analyzing trace with hash 21884, now seen corresponding path program 1 times [2022-12-13 13:16:04,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:04,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541024160] [2022-12-13 13:16:04,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:04,834 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 [2022-12-13 13:16:04,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:04,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:04,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:04,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 13:16:04,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:04,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:16:04,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:04,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541024160] [2022-12-13 13:16:04,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541024160] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:16:04,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:16:04,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:16:04,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259961979] [2022-12-13 13:16:04,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:16:04,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:16:04,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:04,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:16:04,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:16:04,955 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 354 [2022-12-13 13:16:04,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:04,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:04,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 354 [2022-12-13 13:16:04,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:05,244 INFO L130 PetriNetUnfolder]: 1088/1465 cut-off events. [2022-12-13 13:16:05,244 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 13:16:05,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2960 conditions, 1465 events. 1088/1465 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 5962 event pairs, 581 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 2953. Up to 1458 conditions per place. [2022-12-13 13:16:05,251 INFO L137 encePairwiseOnDemand]: 349/354 looper letters, 37 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2022-12-13 13:16:05,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 169 flow [2022-12-13 13:16:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:16:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:16:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2022-12-13 13:16:05,253 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4689265536723164 [2022-12-13 13:16:05,254 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2022-12-13 13:16:05,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2022-12-13 13:16:05,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:05,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2022-12-13 13:16:05,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:05,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:05,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:05,259 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 87 flow. Second operand 3 states and 498 transitions. [2022-12-13 13:16:05,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 169 flow [2022-12-13 13:16:05,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:16:05,260 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 102 flow [2022-12-13 13:16:05,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2022-12-13 13:16:05,261 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -11 predicate places. [2022-12-13 13:16:05,262 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 102 flow [2022-12-13 13:16:05,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:05,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:05,262 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:16:05,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 13:16:05,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:05,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash 21762, now seen corresponding path program 1 times [2022-12-13 13:16:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:05,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519758655] [2022-12-13 13:16:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:05,467 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 [2022-12-13 13:16:05,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:05,470 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:05,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:05,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:16:05,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:05,739 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:16:05,740 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:16:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:05,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:16:05,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:05,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519758655] [2022-12-13 13:16:05,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519758655] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:16:05,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:16:05,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:16:05,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765298650] [2022-12-13 13:16:05,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:16:05,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:16:05,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:16:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:16:05,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 354 [2022-12-13 13:16:05,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:05,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:05,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 354 [2022-12-13 13:16:05,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:06,224 INFO L130 PetriNetUnfolder]: 1088/1464 cut-off events. [2022-12-13 13:16:06,224 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 13:16:06,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2966 conditions, 1464 events. 1088/1464 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 5985 event pairs, 581 based on Foata normal form. 1/522 useless extension candidates. Maximal degree in co-relation 2957. Up to 1458 conditions per place. [2022-12-13 13:16:06,229 INFO L137 encePairwiseOnDemand]: 351/354 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2022-12-13 13:16:06,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 178 flow [2022-12-13 13:16:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:16:06,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:16:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2022-12-13 13:16:06,231 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4604519774011299 [2022-12-13 13:16:06,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2022-12-13 13:16:06,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2022-12-13 13:16:06,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:06,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2022-12-13 13:16:06,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:06,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:06,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:06,234 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 102 flow. Second operand 3 states and 489 transitions. [2022-12-13 13:16:06,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 178 flow [2022-12-13 13:16:06,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 13:16:06,235 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 106 flow [2022-12-13 13:16:06,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2022-12-13 13:16:06,235 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -9 predicate places. [2022-12-13 13:16:06,235 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 106 flow [2022-12-13 13:16:06,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:06,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:06,236 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:16:06,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 13:16:06,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:06,436 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:06,437 INFO L85 PathProgramCache]: Analyzing trace with hash 678559, now seen corresponding path program 1 times [2022-12-13 13:16:06,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:06,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007497243] [2022-12-13 13:16:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:06,437 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 [2022-12-13 13:16:06,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:06,438 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:06,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:06,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 13:16:06,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:06,591 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:16:06,591 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:16:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:06,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:16:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:06,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:06,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007497243] [2022-12-13 13:16:06,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007497243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:16:06,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:16:06,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 13:16:06,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332048283] [2022-12-13 13:16:06,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:16:06,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:16:06,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:06,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:16:06,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:16:07,659 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 354 [2022-12-13 13:16:07,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:07,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:07,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 354 [2022-12-13 13:16:07,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:08,368 INFO L130 PetriNetUnfolder]: 2181/2933 cut-off events. [2022-12-13 13:16:08,368 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 13:16:08,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5944 conditions, 2933 events. 2181/2933 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 13531 event pairs, 1162 based on Foata normal form. 3/1044 useless extension candidates. Maximal degree in co-relation 5933. Up to 1461 conditions per place. [2022-12-13 13:16:08,377 INFO L137 encePairwiseOnDemand]: 348/354 looper letters, 70 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-12-13 13:16:08,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 384 flow [2022-12-13 13:16:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:16:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:16:08,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 954 transitions. [2022-12-13 13:16:08,380 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4491525423728814 [2022-12-13 13:16:08,380 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 954 transitions. [2022-12-13 13:16:08,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 954 transitions. [2022-12-13 13:16:08,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:08,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 954 transitions. [2022-12-13 13:16:08,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:08,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:08,384 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:08,384 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 106 flow. Second operand 6 states and 954 transitions. [2022-12-13 13:16:08,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 384 flow [2022-12-13 13:16:08,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 83 transitions, 380 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:16:08,386 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 200 flow [2022-12-13 13:16:08,386 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2022-12-13 13:16:08,386 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2022-12-13 13:16:08,386 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 200 flow [2022-12-13 13:16:08,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:08,387 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:08,387 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:16:08,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 13:16:08,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:08,587 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:08,588 INFO L85 PathProgramCache]: Analyzing trace with hash 678681, now seen corresponding path program 1 times [2022-12-13 13:16:08,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:08,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115187719] [2022-12-13 13:16:08,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:08,588 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 [2022-12-13 13:16:08,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:08,589 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:08,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:08,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 13:16:08,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:08,734 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-12-13 13:16:08,734 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 6 case distinctions, treesize of input 38 treesize of output 51 [2022-12-13 13:16:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:16:08,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:16:08,778 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:08,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115187719] [2022-12-13 13:16:08,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115187719] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:16:08,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:16:08,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:16:08,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624561656] [2022-12-13 13:16:08,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:16:08,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:16:08,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:08,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:16:08,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:16:08,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 354 [2022-12-13 13:16:08,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:08,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:08,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 354 [2022-12-13 13:16:08,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:09,249 INFO L130 PetriNetUnfolder]: 1809/2459 cut-off events. [2022-12-13 13:16:09,249 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-12-13 13:16:09,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5022 conditions, 2459 events. 1809/2459 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 11206 event pairs, 952 based on Foata normal form. 0/915 useless extension candidates. Maximal degree in co-relation 5007. Up to 2447 conditions per place. [2022-12-13 13:16:09,257 INFO L137 encePairwiseOnDemand]: 351/354 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-12-13 13:16:09,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 260 flow [2022-12-13 13:16:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:16:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:16:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2022-12-13 13:16:09,259 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4585687382297552 [2022-12-13 13:16:09,259 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2022-12-13 13:16:09,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2022-12-13 13:16:09,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:09,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2022-12-13 13:16:09,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:09,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:09,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:09,262 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 200 flow. Second operand 3 states and 487 transitions. [2022-12-13 13:16:09,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 260 flow [2022-12-13 13:16:09,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 244 flow, removed 7 selfloop flow, removed 1 redundant places. [2022-12-13 13:16:09,263 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 160 flow [2022-12-13 13:16:09,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2022-12-13 13:16:09,264 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2022-12-13 13:16:09,264 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 160 flow [2022-12-13 13:16:09,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:09,264 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:09,265 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:16:09,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 13:16:09,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:09,465 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:09,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:09,466 INFO L85 PathProgramCache]: Analyzing trace with hash 678676, now seen corresponding path program 1 times [2022-12-13 13:16:09,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:09,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755680992] [2022-12-13 13:16:09,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:09,466 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 [2022-12-13 13:16:09,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:09,467 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:09,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:09,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 13:16:09,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:09,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:16:09,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:16:09,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:16:09,629 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-12-13 13:16:09,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2022-12-13 13:16:09,646 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 13:16:09,646 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 23 treesize of output 19 [2022-12-13 13:16:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:09,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:16:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:10,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:10,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755680992] [2022-12-13 13:16:10,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755680992] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:16:10,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:16:10,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 13:16:10,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951072506] [2022-12-13 13:16:10,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:16:10,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:16:10,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:10,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:16:10,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:16:10,847 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 354 [2022-12-13 13:16:10,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:10,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:10,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 354 [2022-12-13 13:16:10,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:11,653 INFO L130 PetriNetUnfolder]: 1622/2221 cut-off events. [2022-12-13 13:16:11,654 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-12-13 13:16:11,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4532 conditions, 2221 events. 1622/2221 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 10082 event pairs, 847 based on Foata normal form. 0/850 useless extension candidates. Maximal degree in co-relation 4516. Up to 1220 conditions per place. [2022-12-13 13:16:11,660 INFO L137 encePairwiseOnDemand]: 348/354 looper letters, 62 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2022-12-13 13:16:11,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 73 transitions, 360 flow [2022-12-13 13:16:11,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:16:11,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 13:16:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1062 transitions. [2022-12-13 13:16:11,663 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2022-12-13 13:16:11,663 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1062 transitions. [2022-12-13 13:16:11,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1062 transitions. [2022-12-13 13:16:11,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:11,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1062 transitions. [2022-12-13 13:16:11,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 151.71428571428572) internal successors, (1062), 7 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:11,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 354.0) internal successors, (2832), 8 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:11,667 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 354.0) internal successors, (2832), 8 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:11,667 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 160 flow. Second operand 7 states and 1062 transitions. [2022-12-13 13:16:11,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 73 transitions, 360 flow [2022-12-13 13:16:11,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:16:11,669 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 167 flow [2022-12-13 13:16:11,669 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=167, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2022-12-13 13:16:11,669 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2022-12-13 13:16:11,669 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 167 flow [2022-12-13 13:16:11,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:11,670 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:11,670 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:16:11,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:11,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:11,871 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:11,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:11,872 INFO L85 PathProgramCache]: Analyzing trace with hash 652225692, now seen corresponding path program 1 times [2022-12-13 13:16:11,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:11,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405814965] [2022-12-13 13:16:11,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:11,874 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 [2022-12-13 13:16:11,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:11,877 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:11,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:12,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 13:16:12,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:12,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:16:12,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:16:12,078 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-13 13:16:12,078 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-12-13 13:16:12,088 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 14 treesize of output 12 [2022-12-13 13:16:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:12,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:16:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:12,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:12,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405814965] [2022-12-13 13:16:12,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405814965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:16:12,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:16:12,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 13:16:12,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231329193] [2022-12-13 13:16:12,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:16:12,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:16:12,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:12,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:16:12,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:16:13,412 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 354 [2022-12-13 13:16:13,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 167 flow. Second operand has 8 states, 8 states have (on average 142.25) internal successors, (1138), 8 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:13,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:13,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 354 [2022-12-13 13:16:13,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:14,060 INFO L130 PetriNetUnfolder]: 1566/2135 cut-off events. [2022-12-13 13:16:14,061 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 13:16:14,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4421 conditions, 2135 events. 1566/2135 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9569 event pairs, 815 based on Foata normal form. 0/878 useless extension candidates. Maximal degree in co-relation 4403. Up to 1182 conditions per place. [2022-12-13 13:16:14,067 INFO L137 encePairwiseOnDemand]: 350/354 looper letters, 64 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2022-12-13 13:16:14,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 365 flow [2022-12-13 13:16:14,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:16:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:16:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 772 transitions. [2022-12-13 13:16:14,070 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43615819209039547 [2022-12-13 13:16:14,070 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 772 transitions. [2022-12-13 13:16:14,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 772 transitions. [2022-12-13 13:16:14,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:14,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 772 transitions. [2022-12-13 13:16:14,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.4) internal successors, (772), 5 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:14,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 354.0) internal successors, (2124), 6 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:14,075 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 354.0) internal successors, (2124), 6 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:14,075 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 167 flow. Second operand 5 states and 772 transitions. [2022-12-13 13:16:14,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 365 flow [2022-12-13 13:16:14,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 335 flow, removed 4 selfloop flow, removed 7 redundant places. [2022-12-13 13:16:14,076 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 139 flow [2022-12-13 13:16:14,077 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2022-12-13 13:16:14,077 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2022-12-13 13:16:14,077 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 139 flow [2022-12-13 13:16:14,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.25) internal successors, (1138), 8 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:14,078 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:14,078 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:16:14,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 13:16:14,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:14,279 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:14,280 INFO L85 PathProgramCache]: Analyzing trace with hash 652225693, now seen corresponding path program 1 times [2022-12-13 13:16:14,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:14,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983965636] [2022-12-13 13:16:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:14,282 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 [2022-12-13 13:16:14,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:14,284 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:14,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:14,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:16:14,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:14,485 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 13:16:14,486 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-12-13 13:16:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:16:14,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:16:14,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:14,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983965636] [2022-12-13 13:16:14,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983965636] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:16:14,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:16:14,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:16:14,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445293551] [2022-12-13 13:16:14,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:16:14,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:16:14,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:14,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:16:14,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:16:14,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 354 [2022-12-13 13:16:14,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:14,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:14,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 354 [2022-12-13 13:16:14,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:15,052 INFO L130 PetriNetUnfolder]: 1510/2049 cut-off events. [2022-12-13 13:16:15,052 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-12-13 13:16:15,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4235 conditions, 2049 events. 1510/2049 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9062 event pairs, 783 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 4219. Up to 2037 conditions per place. [2022-12-13 13:16:15,058 INFO L137 encePairwiseOnDemand]: 351/354 looper letters, 36 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2022-12-13 13:16:15,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 39 transitions, 209 flow [2022-12-13 13:16:15,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:16:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:16:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2022-12-13 13:16:15,060 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4548022598870056 [2022-12-13 13:16:15,060 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2022-12-13 13:16:15,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2022-12-13 13:16:15,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:15,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2022-12-13 13:16:15,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:15,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:15,062 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:15,062 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 139 flow. Second operand 3 states and 483 transitions. [2022-12-13 13:16:15,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 39 transitions, 209 flow [2022-12-13 13:16:15,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 39 transitions, 204 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:16:15,063 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 132 flow [2022-12-13 13:16:15,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2022-12-13 13:16:15,063 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -5 predicate places. [2022-12-13 13:16:15,063 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 132 flow [2022-12-13 13:16:15,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:15,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:15,064 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:16:15,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 13:16:15,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:15,265 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:15,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:15,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1255844665, now seen corresponding path program 1 times [2022-12-13 13:16:15,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:15,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981373394] [2022-12-13 13:16:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:15,269 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 [2022-12-13 13:16:15,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:15,272 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:15,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:15,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 13:16:15,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:16:15,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:16:15,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:15,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981373394] [2022-12-13 13:16:15,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981373394] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:16:15,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:16:15,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:16:15,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994521177] [2022-12-13 13:16:15,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:16:15,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:16:15,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:15,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:16:15,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:16:15,419 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 354 [2022-12-13 13:16:15,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:15,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:15,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 354 [2022-12-13 13:16:15,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:15,633 INFO L130 PetriNetUnfolder]: 923/1288 cut-off events. [2022-12-13 13:16:15,633 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-12-13 13:16:15,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2676 conditions, 1288 events. 923/1288 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 5405 event pairs, 478 based on Foata normal form. 0/635 useless extension candidates. Maximal degree in co-relation 2660. Up to 1271 conditions per place. [2022-12-13 13:16:15,637 INFO L137 encePairwiseOnDemand]: 350/354 looper letters, 31 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2022-12-13 13:16:15,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 37 transitions, 198 flow [2022-12-13 13:16:15,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:16:15,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:16:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2022-12-13 13:16:15,638 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4416195856873823 [2022-12-13 13:16:15,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2022-12-13 13:16:15,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2022-12-13 13:16:15,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:15,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2022-12-13 13:16:15,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:15,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:15,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:15,640 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 132 flow. Second operand 3 states and 469 transitions. [2022-12-13 13:16:15,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 37 transitions, 198 flow [2022-12-13 13:16:15,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 37 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:16:15,641 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 135 flow [2022-12-13 13:16:15,641 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2022-12-13 13:16:15,642 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -6 predicate places. [2022-12-13 13:16:15,642 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 135 flow [2022-12-13 13:16:15,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:15,642 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:15,642 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:16:15,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 13:16:15,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:15,843 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:15,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1255844664, now seen corresponding path program 1 times [2022-12-13 13:16:15,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:15,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111490640] [2022-12-13 13:16:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:15,846 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 [2022-12-13 13:16:15,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:15,848 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:15,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:16,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:16:16,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:16:16,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:16:16,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:16,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111490640] [2022-12-13 13:16:16,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111490640] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:16:16,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:16:16,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:16:16,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115270444] [2022-12-13 13:16:16,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:16:16,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:16:16,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:16,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:16:16,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:16:16,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 354 [2022-12-13 13:16:16,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:16,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:16,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 354 [2022-12-13 13:16:16,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:16,601 INFO L130 PetriNetUnfolder]: 1249/1818 cut-off events. [2022-12-13 13:16:16,602 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 13:16:16,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3783 conditions, 1818 events. 1249/1818 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8943 event pairs, 494 based on Foata normal form. 0/997 useless extension candidates. Maximal degree in co-relation 3767. Up to 1157 conditions per place. [2022-12-13 13:16:16,606 INFO L137 encePairwiseOnDemand]: 348/354 looper letters, 51 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2022-12-13 13:16:16,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 302 flow [2022-12-13 13:16:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:16:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:16:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 788 transitions. [2022-12-13 13:16:16,608 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44519774011299434 [2022-12-13 13:16:16,608 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 788 transitions. [2022-12-13 13:16:16,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 788 transitions. [2022-12-13 13:16:16,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:16,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 788 transitions. [2022-12-13 13:16:16,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:16,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 354.0) internal successors, (2124), 6 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:16,610 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 354.0) internal successors, (2124), 6 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:16,610 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 135 flow. Second operand 5 states and 788 transitions. [2022-12-13 13:16:16,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 302 flow [2022-12-13 13:16:16,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:16:16,611 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 153 flow [2022-12-13 13:16:16,612 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2022-12-13 13:16:16,612 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2022-12-13 13:16:16,612 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 153 flow [2022-12-13 13:16:16,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:16,612 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:16,612 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 13:16:16,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 13:16:16,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:16,813 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:16,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:16,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1255975870, now seen corresponding path program 2 times [2022-12-13 13:16:16,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:16,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255689443] [2022-12-13 13:16:16,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:16:16,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:16,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:16,819 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:16,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:16,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:16:16,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:16:16,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 13:16:16,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:17,026 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:16:17,026 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:16:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:17,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:16:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:17,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:17,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255689443] [2022-12-13 13:16:17,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255689443] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:16:17,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:16:17,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 13:16:17,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522414377] [2022-12-13 13:16:17,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:16:17,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:16:17,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:17,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:16:17,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:16:21,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 354 [2022-12-13 13:16:21,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 153 flow. Second operand has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:21,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:21,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 354 [2022-12-13 13:16:21,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:25,231 INFO L130 PetriNetUnfolder]: 4509/6598 cut-off events. [2022-12-13 13:16:25,231 INFO L131 PetriNetUnfolder]: For 852/1164 co-relation queries the response was YES. [2022-12-13 13:16:25,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15034 conditions, 6598 events. 4509/6598 cut-off events. For 852/1164 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 38138 event pairs, 2886 based on Foata normal form. 318/4516 useless extension candidates. Maximal degree in co-relation 15016. Up to 961 conditions per place. [2022-12-13 13:16:25,256 INFO L137 encePairwiseOnDemand]: 349/354 looper letters, 214 selfloop transitions, 15 changer transitions 0/231 dead transitions. [2022-12-13 13:16:25,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 231 transitions, 1205 flow [2022-12-13 13:16:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:16:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 13:16:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1979 transitions. [2022-12-13 13:16:25,262 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4658662900188324 [2022-12-13 13:16:25,262 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1979 transitions. [2022-12-13 13:16:25,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1979 transitions. [2022-12-13 13:16:25,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:25,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1979 transitions. [2022-12-13 13:16:25,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 164.91666666666666) internal successors, (1979), 12 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:25,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 354.0) internal successors, (4602), 13 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:25,273 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 354.0) internal successors, (4602), 13 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:25,273 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 153 flow. Second operand 12 states and 1979 transitions. [2022-12-13 13:16:25,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 231 transitions, 1205 flow [2022-12-13 13:16:25,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 231 transitions, 1160 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:16:25,280 INFO L231 Difference]: Finished difference. Result has 69 places, 48 transitions, 267 flow [2022-12-13 13:16:25,280 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=267, PETRI_PLACES=69, PETRI_TRANSITIONS=48} [2022-12-13 13:16:25,281 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2022-12-13 13:16:25,281 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 48 transitions, 267 flow [2022-12-13 13:16:25,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:25,282 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:25,282 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 13:16:25,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 13:16:25,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:25,483 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:25,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1255975753, now seen corresponding path program 2 times [2022-12-13 13:16:25,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:25,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694850672] [2022-12-13 13:16:25,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:16:25,484 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 [2022-12-13 13:16:25,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:25,485 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:25,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:25,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 13:16:25,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:16:25,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 13:16:25,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:25,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:16:25,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:16:25,652 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-13 13:16:25,652 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-12-13 13:16:25,677 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-13 13:16:25,677 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 90 treesize of output 89 [2022-12-13 13:16:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:16:25,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:16:25,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:25,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694850672] [2022-12-13 13:16:25,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694850672] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:16:25,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:16:25,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:16:25,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153494001] [2022-12-13 13:16:25,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:16:25,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:16:25,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:16:25,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:16:25,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 354 [2022-12-13 13:16:25,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 48 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:25,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:25,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 354 [2022-12-13 13:16:25,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:26,614 INFO L130 PetriNetUnfolder]: 4507/6591 cut-off events. [2022-12-13 13:16:26,614 INFO L131 PetriNetUnfolder]: For 865/1177 co-relation queries the response was YES. [2022-12-13 13:16:26,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14706 conditions, 6591 events. 4507/6591 cut-off events. For 865/1177 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 38563 event pairs, 2886 based on Foata normal form. 312/4503 useless extension candidates. Maximal degree in co-relation 14681. Up to 6551 conditions per place. [2022-12-13 13:16:26,643 INFO L137 encePairwiseOnDemand]: 352/354 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-12-13 13:16:26,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 45 transitions, 320 flow [2022-12-13 13:16:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:16:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:16:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2022-12-13 13:16:26,645 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4425612052730697 [2022-12-13 13:16:26,645 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2022-12-13 13:16:26,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2022-12-13 13:16:26,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:26,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2022-12-13 13:16:26,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:26,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:26,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:26,649 INFO L175 Difference]: Start difference. First operand has 69 places, 48 transitions, 267 flow. Second operand 3 states and 470 transitions. [2022-12-13 13:16:26,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 45 transitions, 320 flow [2022-12-13 13:16:26,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 45 transitions, 302 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-12-13 13:16:26,651 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 218 flow [2022-12-13 13:16:26,652 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=65, PETRI_TRANSITIONS=45} [2022-12-13 13:16:26,652 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2022-12-13 13:16:26,652 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 218 flow [2022-12-13 13:16:26,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:26,653 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:26,653 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:16:26,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 13:16:26,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:26,853 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:26,854 INFO L85 PathProgramCache]: Analyzing trace with hash -276474008, now seen corresponding path program 1 times [2022-12-13 13:16:26,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:26,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998878001] [2022-12-13 13:16:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:26,854 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 [2022-12-13 13:16:26,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:26,855 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:26,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:26,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 13:16:26,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:27,001 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:16:27,002 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:16:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:16:27,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:16:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:16:27,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:27,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998878001] [2022-12-13 13:16:27,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998878001] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:16:27,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:16:27,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 13:16:27,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381185875] [2022-12-13 13:16:27,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:16:27,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:16:27,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:27,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:16:27,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:16:29,780 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 354 [2022-12-13 13:16:29,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 45 transitions, 218 flow. Second operand has 10 states, 10 states have (on average 142.4) internal successors, (1424), 10 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:29,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:29,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 354 [2022-12-13 13:16:29,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:31,901 INFO L130 PetriNetUnfolder]: 8547/11935 cut-off events. [2022-12-13 13:16:31,901 INFO L131 PetriNetUnfolder]: For 1314/1314 co-relation queries the response was YES. [2022-12-13 13:16:31,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27093 conditions, 11935 events. 8547/11935 cut-off events. For 1314/1314 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 71465 event pairs, 910 based on Foata normal form. 328/8303 useless extension candidates. Maximal degree in co-relation 27067. Up to 3448 conditions per place. [2022-12-13 13:16:31,938 INFO L137 encePairwiseOnDemand]: 348/354 looper letters, 93 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2022-12-13 13:16:31,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 107 transitions, 579 flow [2022-12-13 13:16:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:16:31,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 13:16:31,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1224 transitions. [2022-12-13 13:16:31,941 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4322033898305085 [2022-12-13 13:16:31,941 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1224 transitions. [2022-12-13 13:16:31,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1224 transitions. [2022-12-13 13:16:31,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:31,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1224 transitions. [2022-12-13 13:16:31,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:31,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 354.0) internal successors, (3186), 9 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:31,945 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 354.0) internal successors, (3186), 9 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:31,945 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 218 flow. Second operand 8 states and 1224 transitions. [2022-12-13 13:16:31,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 107 transitions, 579 flow [2022-12-13 13:16:31,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 576 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 13:16:31,950 INFO L231 Difference]: Finished difference. Result has 76 places, 50 transitions, 290 flow [2022-12-13 13:16:31,950 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=290, PETRI_PLACES=76, PETRI_TRANSITIONS=50} [2022-12-13 13:16:31,950 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2022-12-13 13:16:31,950 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 50 transitions, 290 flow [2022-12-13 13:16:31,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.4) internal successors, (1424), 10 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:31,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:31,951 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:16:31,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 13:16:32,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:32,152 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:32,152 INFO L85 PathProgramCache]: Analyzing trace with hash -276317968, now seen corresponding path program 1 times [2022-12-13 13:16:32,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:32,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929854634] [2022-12-13 13:16:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:32,153 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 [2022-12-13 13:16:32,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:32,154 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:32,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:32,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:16:32,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:32,343 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:16:32,343 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:16:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:32,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:16:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:32,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:32,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929854634] [2022-12-13 13:16:32,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929854634] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:16:32,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:16:32,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 13:16:32,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425024986] [2022-12-13 13:16:32,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:16:32,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:16:32,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:32,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:16:32,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:16:34,897 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 [0] [2022-12-13 13:16:35,473 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 354 [2022-12-13 13:16:35,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 50 transitions, 290 flow. Second operand has 8 states, 8 states have (on average 142.75) internal successors, (1142), 8 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:35,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:35,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 354 [2022-12-13 13:16:35,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:36,671 INFO L130 PetriNetUnfolder]: 7027/9807 cut-off events. [2022-12-13 13:16:36,671 INFO L131 PetriNetUnfolder]: For 14876/15996 co-relation queries the response was YES. [2022-12-13 13:16:36,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28429 conditions, 9807 events. 7027/9807 cut-off events. For 14876/15996 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 53880 event pairs, 4296 based on Foata normal form. 1120/8189 useless extension candidates. Maximal degree in co-relation 28397. Up to 8798 conditions per place. [2022-12-13 13:16:36,703 INFO L137 encePairwiseOnDemand]: 350/354 looper letters, 71 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2022-12-13 13:16:36,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 554 flow [2022-12-13 13:16:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:16:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:16:36,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 759 transitions. [2022-12-13 13:16:36,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4288135593220339 [2022-12-13 13:16:36,705 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 759 transitions. [2022-12-13 13:16:36,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 759 transitions. [2022-12-13 13:16:36,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:36,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 759 transitions. [2022-12-13 13:16:36,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.8) internal successors, (759), 5 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:36,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 354.0) internal successors, (2124), 6 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:36,707 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 354.0) internal successors, (2124), 6 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:36,708 INFO L175 Difference]: Start difference. First operand has 76 places, 50 transitions, 290 flow. Second operand 5 states and 759 transitions. [2022-12-13 13:16:36,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 554 flow [2022-12-13 13:16:36,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 527 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-12-13 13:16:36,716 INFO L231 Difference]: Finished difference. Result has 75 places, 48 transitions, 275 flow [2022-12-13 13:16:36,716 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=75, PETRI_TRANSITIONS=48} [2022-12-13 13:16:36,716 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2022-12-13 13:16:36,716 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 48 transitions, 275 flow [2022-12-13 13:16:36,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.75) internal successors, (1142), 8 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:36,717 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:36,717 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:16:36,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:36,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:36,918 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:36,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:36,919 INFO L85 PathProgramCache]: Analyzing trace with hash -276317967, now seen corresponding path program 1 times [2022-12-13 13:16:36,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:36,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519418616] [2022-12-13 13:16:36,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:36,919 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 [2022-12-13 13:16:36,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:36,920 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:36,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:37,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:16:37,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:37,094 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-12-13 13:16:37,095 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 3 case distinctions, treesize of input 15 treesize of output 46 [2022-12-13 13:16:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:16:37,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:16:37,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:37,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519418616] [2022-12-13 13:16:37,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519418616] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:16:37,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:16:37,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:16:37,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338739383] [2022-12-13 13:16:37,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:16:37,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:16:37,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:37,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:16:37,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:16:37,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 354 [2022-12-13 13:16:37,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 48 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:37,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:37,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 354 [2022-12-13 13:16:37,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:38,058 INFO L130 PetriNetUnfolder]: 6323/8815 cut-off events. [2022-12-13 13:16:38,058 INFO L131 PetriNetUnfolder]: For 11457/12449 co-relation queries the response was YES. [2022-12-13 13:16:38,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24527 conditions, 8815 events. 6323/8815 cut-off events. For 11457/12449 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 48217 event pairs, 3880 based on Foata normal form. 992/7583 useless extension candidates. Maximal degree in co-relation 24495. Up to 8791 conditions per place. [2022-12-13 13:16:38,106 INFO L137 encePairwiseOnDemand]: 351/354 looper letters, 43 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2022-12-13 13:16:38,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 46 transitions, 359 flow [2022-12-13 13:16:38,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:16:38,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:16:38,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2022-12-13 13:16:38,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4397363465160075 [2022-12-13 13:16:38,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2022-12-13 13:16:38,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2022-12-13 13:16:38,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:38,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2022-12-13 13:16:38,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:38,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:38,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:38,110 INFO L175 Difference]: Start difference. First operand has 75 places, 48 transitions, 275 flow. Second operand 3 states and 467 transitions. [2022-12-13 13:16:38,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 46 transitions, 359 flow [2022-12-13 13:16:38,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 46 transitions, 354 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:16:38,119 INFO L231 Difference]: Finished difference. Result has 72 places, 46 transitions, 268 flow [2022-12-13 13:16:38,119 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=72, PETRI_TRANSITIONS=46} [2022-12-13 13:16:38,120 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 16 predicate places. [2022-12-13 13:16:38,120 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 46 transitions, 268 flow [2022-12-13 13:16:38,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:38,120 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:38,120 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:16:38,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 13:16:38,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:38,321 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:38,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:38,323 INFO L85 PathProgramCache]: Analyzing trace with hash 24072884, now seen corresponding path program 1 times [2022-12-13 13:16:38,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:38,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882861578] [2022-12-13 13:16:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:38,325 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 [2022-12-13 13:16:38,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:38,328 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:38,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:38,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:16:38,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:16:38,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:16:38,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:38,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882861578] [2022-12-13 13:16:38,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882861578] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:16:38,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:16:38,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:16:38,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685402310] [2022-12-13 13:16:38,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:16:38,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:16:38,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:38,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:16:38,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:16:38,717 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 354 [2022-12-13 13:16:38,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 46 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 148.6) internal successors, (743), 5 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:38,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:38,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 354 [2022-12-13 13:16:38,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:40,025 INFO L130 PetriNetUnfolder]: 7843/11551 cut-off events. [2022-12-13 13:16:40,025 INFO L131 PetriNetUnfolder]: For 18477/19997 co-relation queries the response was YES. [2022-12-13 13:16:40,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33274 conditions, 11551 events. 7843/11551 cut-off events. For 18477/19997 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 66592 event pairs, 3920 based on Foata normal form. 1520/11391 useless extension candidates. Maximal degree in co-relation 33242. Up to 7746 conditions per place. [2022-12-13 13:16:40,076 INFO L137 encePairwiseOnDemand]: 349/354 looper letters, 59 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2022-12-13 13:16:40,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 68 transitions, 491 flow [2022-12-13 13:16:40,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:16:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:16:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 777 transitions. [2022-12-13 13:16:40,078 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43898305084745765 [2022-12-13 13:16:40,079 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 777 transitions. [2022-12-13 13:16:40,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 777 transitions. [2022-12-13 13:16:40,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:40,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 777 transitions. [2022-12-13 13:16:40,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 155.4) internal successors, (777), 5 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:40,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 354.0) internal successors, (2124), 6 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:40,082 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 354.0) internal successors, (2124), 6 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:40,082 INFO L175 Difference]: Start difference. First operand has 72 places, 46 transitions, 268 flow. Second operand 5 states and 777 transitions. [2022-12-13 13:16:40,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 68 transitions, 491 flow [2022-12-13 13:16:40,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 68 transitions, 490 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:16:40,093 INFO L231 Difference]: Finished difference. Result has 76 places, 47 transitions, 291 flow [2022-12-13 13:16:40,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=76, PETRI_TRANSITIONS=47} [2022-12-13 13:16:40,093 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2022-12-13 13:16:40,094 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 47 transitions, 291 flow [2022-12-13 13:16:40,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.6) internal successors, (743), 5 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:40,094 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:40,094 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:16:40,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 13:16:40,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:40,295 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:40,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:40,297 INFO L85 PathProgramCache]: Analyzing trace with hash 746263291, now seen corresponding path program 1 times [2022-12-13 13:16:40,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:40,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796442893] [2022-12-13 13:16:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:40,299 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 [2022-12-13 13:16:40,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:40,302 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:40,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:40,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 13:16:40,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:40,484 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:16:40,485 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:16:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:16:40,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:16:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:16:41,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:41,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796442893] [2022-12-13 13:16:41,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796442893] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:16:41,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:16:41,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 13:16:41,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74230764] [2022-12-13 13:16:41,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:16:41,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:16:41,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:41,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:16:41,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:16:43,355 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 354 [2022-12-13 13:16:43,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 47 transitions, 291 flow. Second operand has 10 states, 10 states have (on average 142.8) internal successors, (1428), 10 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:43,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:43,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 354 [2022-12-13 13:16:43,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:46,298 INFO L130 PetriNetUnfolder]: 12767/18155 cut-off events. [2022-12-13 13:16:46,299 INFO L131 PetriNetUnfolder]: For 30032/32296 co-relation queries the response was YES. [2022-12-13 13:16:46,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55780 conditions, 18155 events. 12767/18155 cut-off events. For 30032/32296 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 103854 event pairs, 2806 based on Foata normal form. 2824/20419 useless extension candidates. Maximal degree in co-relation 55746. Up to 5790 conditions per place. [2022-12-13 13:16:46,378 INFO L137 encePairwiseOnDemand]: 348/354 looper letters, 107 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2022-12-13 13:16:46,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 121 transitions, 859 flow [2022-12-13 13:16:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:16:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 13:16:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1208 transitions. [2022-12-13 13:16:46,382 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4265536723163842 [2022-12-13 13:16:46,382 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1208 transitions. [2022-12-13 13:16:46,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1208 transitions. [2022-12-13 13:16:46,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:46,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1208 transitions. [2022-12-13 13:16:46,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:46,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 354.0) internal successors, (3186), 9 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:46,386 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 354.0) internal successors, (3186), 9 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:46,386 INFO L175 Difference]: Start difference. First operand has 76 places, 47 transitions, 291 flow. Second operand 8 states and 1208 transitions. [2022-12-13 13:16:46,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 121 transitions, 859 flow [2022-12-13 13:16:46,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 843 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 13:16:46,406 INFO L231 Difference]: Finished difference. Result has 85 places, 52 transitions, 350 flow [2022-12-13 13:16:46,407 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=350, PETRI_PLACES=85, PETRI_TRANSITIONS=52} [2022-12-13 13:16:46,407 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2022-12-13 13:16:46,407 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 52 transitions, 350 flow [2022-12-13 13:16:46,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.8) internal successors, (1428), 10 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:46,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:46,407 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:16:46,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:46,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:46,608 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:46,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:46,610 INFO L85 PathProgramCache]: Analyzing trace with hash 137122917, now seen corresponding path program 1 times [2022-12-13 13:16:46,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:46,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348296545] [2022-12-13 13:16:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:46,612 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 [2022-12-13 13:16:46,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:46,614 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:46,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:46,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:16:46,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:16:46,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:16:46,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:46,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348296545] [2022-12-13 13:16:46,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348296545] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:16:46,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:16:46,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:16:46,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796925962] [2022-12-13 13:16:46,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:16:46,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:16:46,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:46,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:16:46,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:16:46,844 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 354 [2022-12-13 13:16:46,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 52 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:46,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:16:46,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 354 [2022-12-13 13:16:46,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:48,397 INFO L130 PetriNetUnfolder]: 8811/12759 cut-off events. [2022-12-13 13:16:48,398 INFO L131 PetriNetUnfolder]: For 36277/39509 co-relation queries the response was YES. [2022-12-13 13:16:48,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47567 conditions, 12759 events. 8811/12759 cut-off events. For 36277/39509 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70833 event pairs, 6264 based on Foata normal form. 4128/16871 useless extension candidates. Maximal degree in co-relation 47528. Up to 12735 conditions per place. [2022-12-13 13:16:48,450 INFO L137 encePairwiseOnDemand]: 352/354 looper letters, 48 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2022-12-13 13:16:48,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 51 transitions, 444 flow [2022-12-13 13:16:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:16:48,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:16:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2022-12-13 13:16:48,452 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4435028248587571 [2022-12-13 13:16:48,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2022-12-13 13:16:48,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2022-12-13 13:16:48,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:48,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2022-12-13 13:16:48,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:48,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:48,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:48,454 INFO L175 Difference]: Start difference. First operand has 85 places, 52 transitions, 350 flow. Second operand 3 states and 471 transitions. [2022-12-13 13:16:48,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 51 transitions, 444 flow [2022-12-13 13:16:48,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 51 transitions, 425 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-12-13 13:16:48,481 INFO L231 Difference]: Finished difference. Result has 82 places, 51 transitions, 329 flow [2022-12-13 13:16:48,481 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=80, 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=329, PETRI_PLACES=82, PETRI_TRANSITIONS=51} [2022-12-13 13:16:48,481 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2022-12-13 13:16:48,481 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 51 transitions, 329 flow [2022-12-13 13:16:48,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:48,481 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:16:48,481 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 13:16:48,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 13:16:48,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:48,682 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:16:48,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:48,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1314979016, now seen corresponding path program 2 times [2022-12-13 13:16:48,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:16:48,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3402616] [2022-12-13 13:16:48,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:16:48,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:16:48,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:16:48,688 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:16:48,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:16:48,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:16:48,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:16:48,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 13:16:48,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:48,944 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:16:48,944 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:16:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:49,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:16:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:16:50,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:16:50,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3402616] [2022-12-13 13:16:50,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3402616] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:16:50,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:16:50,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 13:16:50,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236657531] [2022-12-13 13:16:50,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:16:50,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:16:50,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:16:50,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:16:50,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:17:03,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 354 [2022-12-13 13:17:03,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 51 transitions, 329 flow. Second operand has 18 states, 18 states have (on average 138.11111111111111) internal successors, (2486), 18 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:03,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:17:03,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 354 [2022-12-13 13:17:03,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:17:13,768 INFO L130 PetriNetUnfolder]: 9731/14257 cut-off events. [2022-12-13 13:17:13,768 INFO L131 PetriNetUnfolder]: For 36544/38508 co-relation queries the response was YES. [2022-12-13 13:17:13,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50648 conditions, 14257 events. 9731/14257 cut-off events. For 36544/38508 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 83588 event pairs, 3472 based on Foata normal form. 2114/16371 useless extension candidates. Maximal degree in co-relation 50610. Up to 5621 conditions per place. [2022-12-13 13:17:13,828 INFO L137 encePairwiseOnDemand]: 346/354 looper letters, 270 selfloop transitions, 24 changer transitions 0/295 dead transitions. [2022-12-13 13:17:13,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 295 transitions, 2038 flow [2022-12-13 13:17:13,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 13:17:13,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 13:17:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2801 transitions. [2022-12-13 13:17:13,834 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4164436515016354 [2022-12-13 13:17:13,834 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2801 transitions. [2022-12-13 13:17:13,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2801 transitions. [2022-12-13 13:17:13,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:17:13,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2801 transitions. [2022-12-13 13:17:13,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 147.42105263157896) internal successors, (2801), 19 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:13,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 354.0) internal successors, (7080), 20 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:13,842 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 354.0) internal successors, (7080), 20 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:13,842 INFO L175 Difference]: Start difference. First operand has 82 places, 51 transitions, 329 flow. Second operand 19 states and 2801 transitions. [2022-12-13 13:17:13,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 295 transitions, 2038 flow [2022-12-13 13:17:13,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 295 transitions, 2037 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:17:13,882 INFO L231 Difference]: Finished difference. Result has 104 places, 66 transitions, 510 flow [2022-12-13 13:17:13,882 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=510, PETRI_PLACES=104, PETRI_TRANSITIONS=66} [2022-12-13 13:17:13,882 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2022-12-13 13:17:13,882 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 66 transitions, 510 flow [2022-12-13 13:17:13,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 138.11111111111111) internal successors, (2486), 18 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:13,883 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:17:13,883 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:17:13,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:17:14,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:17:14,084 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:17:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:17:14,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1182837876, now seen corresponding path program 2 times [2022-12-13 13:17:14,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:17:14,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676578416] [2022-12-13 13:17:14,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:17:14,086 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 [2022-12-13 13:17:14,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:17:14,089 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:17:14,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:17:14,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:17:14,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:17:14,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 13:17:14,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:17:14,313 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:17:14,314 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:17:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:17:14,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:17:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:17:15,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:17:15,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676578416] [2022-12-13 13:17:15,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676578416] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:17:15,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:17:15,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 13:17:15,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616062174] [2022-12-13 13:17:15,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:17:15,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:17:15,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:17:15,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:17:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:17:26,240 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 354 [2022-12-13 13:17:26,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 66 transitions, 510 flow. Second operand has 18 states, 18 states have (on average 138.33333333333334) internal successors, (2490), 18 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:26,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:17:26,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 354 [2022-12-13 13:17:26,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:17:35,931 INFO L130 PetriNetUnfolder]: 10403/15455 cut-off events. [2022-12-13 13:17:35,931 INFO L131 PetriNetUnfolder]: For 56965/58828 co-relation queries the response was YES. [2022-12-13 13:17:35,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60196 conditions, 15455 events. 10403/15455 cut-off events. For 56965/58828 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 93676 event pairs, 4162 based on Foata normal form. 1774/17229 useless extension candidates. Maximal degree in co-relation 60152. Up to 6361 conditions per place. [2022-12-13 13:17:36,004 INFO L137 encePairwiseOnDemand]: 346/354 looper letters, 270 selfloop transitions, 24 changer transitions 0/297 dead transitions. [2022-12-13 13:17:36,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 297 transitions, 2487 flow [2022-12-13 13:17:36,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 13:17:36,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 13:17:36,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2792 transitions. [2022-12-13 13:17:36,008 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4151055605114481 [2022-12-13 13:17:36,008 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2792 transitions. [2022-12-13 13:17:36,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2792 transitions. [2022-12-13 13:17:36,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:17:36,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2792 transitions. [2022-12-13 13:17:36,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 146.94736842105263) internal successors, (2792), 19 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:36,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 354.0) internal successors, (7080), 20 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:36,033 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 354.0) internal successors, (7080), 20 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:36,033 INFO L175 Difference]: Start difference. First operand has 104 places, 66 transitions, 510 flow. Second operand 19 states and 2792 transitions. [2022-12-13 13:17:36,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 297 transitions, 2487 flow [2022-12-13 13:17:36,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 297 transitions, 2267 flow, removed 100 selfloop flow, removed 7 redundant places. [2022-12-13 13:17:36,103 INFO L231 Difference]: Finished difference. Result has 120 places, 80 transitions, 615 flow [2022-12-13 13:17:36,103 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=615, PETRI_PLACES=120, PETRI_TRANSITIONS=80} [2022-12-13 13:17:36,103 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2022-12-13 13:17:36,103 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 80 transitions, 615 flow [2022-12-13 13:17:36,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 138.33333333333334) internal successors, (2490), 18 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:36,103 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:17:36,103 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-12-13 13:17:36,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 13:17:36,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:17:36,304 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:17:36,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:17:36,305 INFO L85 PathProgramCache]: Analyzing trace with hash 691317355, now seen corresponding path program 3 times [2022-12-13 13:17:36,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:17:36,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285157646] [2022-12-13 13:17:36,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:17:36,306 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 [2022-12-13 13:17:36,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:17:36,308 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:17:36,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 13:17:36,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 13:17:36,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:17:36,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 13:17:36,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:17:36,670 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:17:36,670 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:17:36,724 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 15 treesize of output 11 [2022-12-13 13:17:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:17:36,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:17:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:17:37,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:17:37,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285157646] [2022-12-13 13:17:37,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285157646] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:17:37,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:17:37,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-12-13 13:17:37,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660311065] [2022-12-13 13:17:37,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:17:37,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:17:37,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:17:37,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:17:37,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:17:39,950 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 354 [2022-12-13 13:17:39,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 80 transitions, 615 flow. Second operand has 16 states, 16 states have (on average 140.25) internal successors, (2244), 16 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:39,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:17:39,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 354 [2022-12-13 13:17:39,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:17:43,314 INFO L130 PetriNetUnfolder]: 8955/13274 cut-off events. [2022-12-13 13:17:43,314 INFO L131 PetriNetUnfolder]: For 59714/62112 co-relation queries the response was YES. [2022-12-13 13:17:43,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56545 conditions, 13274 events. 8955/13274 cut-off events. For 59714/62112 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 78508 event pairs, 4006 based on Foata normal form. 1679/14938 useless extension candidates. Maximal degree in co-relation 56498. Up to 7288 conditions per place. [2022-12-13 13:17:43,382 INFO L137 encePairwiseOnDemand]: 347/354 looper letters, 201 selfloop transitions, 21 changer transitions 0/225 dead transitions. [2022-12-13 13:17:43,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 225 transitions, 1927 flow [2022-12-13 13:17:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 13:17:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 13:17:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2214 transitions. [2022-12-13 13:17:43,385 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41694915254237286 [2022-12-13 13:17:43,385 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2214 transitions. [2022-12-13 13:17:43,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2214 transitions. [2022-12-13 13:17:43,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:17:43,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2214 transitions. [2022-12-13 13:17:43,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 147.6) internal successors, (2214), 15 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:43,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 354.0) internal successors, (5664), 16 states have internal predecessors, (5664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:43,391 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 354.0) internal successors, (5664), 16 states have internal predecessors, (5664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:43,391 INFO L175 Difference]: Start difference. First operand has 120 places, 80 transitions, 615 flow. Second operand 15 states and 2214 transitions. [2022-12-13 13:17:43,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 225 transitions, 1927 flow [2022-12-13 13:17:43,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 225 transitions, 1783 flow, removed 66 selfloop flow, removed 4 redundant places. [2022-12-13 13:17:43,513 INFO L231 Difference]: Finished difference. Result has 135 places, 84 transitions, 679 flow [2022-12-13 13:17:43,513 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=679, PETRI_PLACES=135, PETRI_TRANSITIONS=84} [2022-12-13 13:17:43,513 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2022-12-13 13:17:43,513 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 84 transitions, 679 flow [2022-12-13 13:17:43,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 140.25) internal successors, (2244), 16 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:43,514 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:17:43,514 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 13:17:43,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-13 13:17:43,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:17:43,715 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:17:43,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:17:43,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1540867874, now seen corresponding path program 3 times [2022-12-13 13:17:43,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:17:43,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001641909] [2022-12-13 13:17:43,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:17:43,717 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 [2022-12-13 13:17:43,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:17:43,720 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:17:43,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 13:17:43,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 13:17:43,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:17:43,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 13:17:43,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:17:44,004 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:17:44,004 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:17:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:17:44,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:17:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:17:46,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:17:46,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001641909] [2022-12-13 13:17:46,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001641909] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:17:46,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:17:46,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 13:17:46,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909448538] [2022-12-13 13:17:46,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:17:46,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 13:17:46,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:17:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 13:17:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 13:18:05,521 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 354 [2022-12-13 13:18:05,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 84 transitions, 679 flow. Second operand has 24 states, 24 states have (on average 147.0) internal successors, (3528), 24 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:18:05,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:18:05,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 354 [2022-12-13 13:18:05,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:18:28,344 INFO L130 PetriNetUnfolder]: 21305/31143 cut-off events. [2022-12-13 13:18:28,344 INFO L131 PetriNetUnfolder]: For 181415/192768 co-relation queries the response was YES. [2022-12-13 13:18:28,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140685 conditions, 31143 events. 21305/31143 cut-off events. For 181415/192768 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 187882 event pairs, 15540 based on Foata normal form. 7790/38926 useless extension candidates. Maximal degree in co-relation 140632. Up to 5091 conditions per place. [2022-12-13 13:18:28,557 INFO L137 encePairwiseOnDemand]: 350/354 looper letters, 631 selfloop transitions, 25 changer transitions 0/663 dead transitions. [2022-12-13 13:18:28,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 663 transitions, 5598 flow [2022-12-13 13:18:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 13:18:28,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 13:18:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3940 transitions. [2022-12-13 13:18:28,563 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4637476459510358 [2022-12-13 13:18:28,563 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3940 transitions. [2022-12-13 13:18:28,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3940 transitions. [2022-12-13 13:18:28,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:18:28,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3940 transitions. [2022-12-13 13:18:28,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 164.16666666666666) internal successors, (3940), 24 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:18:28,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 354.0) internal successors, (8850), 25 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:18:28,573 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 354.0) internal successors, (8850), 25 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:18:28,573 INFO L175 Difference]: Start difference. First operand has 135 places, 84 transitions, 679 flow. Second operand 24 states and 3940 transitions. [2022-12-13 13:18:28,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 663 transitions, 5598 flow [2022-12-13 13:18:28,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 663 transitions, 5583 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-12-13 13:18:28,932 INFO L231 Difference]: Finished difference. Result has 165 places, 98 transitions, 848 flow [2022-12-13 13:18:28,933 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=848, PETRI_PLACES=165, PETRI_TRANSITIONS=98} [2022-12-13 13:18:28,933 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 109 predicate places. [2022-12-13 13:18:28,933 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 98 transitions, 848 flow [2022-12-13 13:18:28,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 147.0) internal successors, (3528), 24 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:18:28,933 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:18:28,933 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-12-13 13:18:28,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-12-13 13:18:29,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:18:29,135 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:18:29,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:18:29,136 INFO L85 PathProgramCache]: Analyzing trace with hash -327282744, now seen corresponding path program 4 times [2022-12-13 13:18:29,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:18:29,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931226349] [2022-12-13 13:18:29,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:18:29,137 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 [2022-12-13 13:18:29,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:18:29,140 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:18:29,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 13:18:29,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:18:29,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:18:29,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 13:18:29,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:18:29,347 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:18:29,347 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:18:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:18:29,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:18:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:18:31,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:18:31,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931226349] [2022-12-13 13:18:31,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931226349] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:18:31,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:18:31,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2022-12-13 13:18:31,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229599563] [2022-12-13 13:18:31,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:18:31,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 13:18:31,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:18:31,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 13:18:31,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-12-13 13:18:52,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 354 [2022-12-13 13:18:52,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 98 transitions, 848 flow. Second operand has 22 states, 22 states have (on average 137.1818181818182) internal successors, (3018), 22 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:18:52,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:18:52,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 354 [2022-12-13 13:18:52,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:19:02,340 INFO L130 PetriNetUnfolder]: 22983/33613 cut-off events. [2022-12-13 13:19:02,340 INFO L131 PetriNetUnfolder]: For 169969/176717 co-relation queries the response was YES. [2022-12-13 13:19:02,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151288 conditions, 33613 events. 22983/33613 cut-off events. For 169969/176717 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 202999 event pairs, 15010 based on Foata normal form. 4062/37590 useless extension candidates. Maximal degree in co-relation 151221. Up to 29773 conditions per place. [2022-12-13 13:19:02,603 INFO L137 encePairwiseOnDemand]: 347/354 looper letters, 302 selfloop transitions, 34 changer transitions 0/339 dead transitions. [2022-12-13 13:19:02,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 339 transitions, 2773 flow [2022-12-13 13:19:02,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 13:19:02,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 13:19:02,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3198 transitions. [2022-12-13 13:19:02,607 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4106317411402157 [2022-12-13 13:19:02,607 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3198 transitions. [2022-12-13 13:19:02,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3198 transitions. [2022-12-13 13:19:02,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:19:02,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3198 transitions. [2022-12-13 13:19:02,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 145.36363636363637) internal successors, (3198), 22 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:02,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 354.0) internal successors, (8142), 23 states have internal predecessors, (8142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:02,615 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 354.0) internal successors, (8142), 23 states have internal predecessors, (8142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:02,615 INFO L175 Difference]: Start difference. First operand has 165 places, 98 transitions, 848 flow. Second operand 22 states and 3198 transitions. [2022-12-13 13:19:02,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 339 transitions, 2773 flow [2022-12-13 13:19:03,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 339 transitions, 2739 flow, removed 5 selfloop flow, removed 11 redundant places. [2022-12-13 13:19:03,440 INFO L231 Difference]: Finished difference. Result has 177 places, 110 transitions, 1021 flow [2022-12-13 13:19:03,440 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1021, PETRI_PLACES=177, PETRI_TRANSITIONS=110} [2022-12-13 13:19:03,440 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 121 predicate places. [2022-12-13 13:19:03,440 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 110 transitions, 1021 flow [2022-12-13 13:19:03,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 137.1818181818182) internal successors, (3018), 22 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:03,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:19:03,441 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-12-13 13:19:03,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-13 13:19:03,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:19:03,642 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:19:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:19:03,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1464694213, now seen corresponding path program 5 times [2022-12-13 13:19:03,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:19:03,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613239684] [2022-12-13 13:19:03,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:19:03,645 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 [2022-12-13 13:19:03,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:19:03,649 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:19:03,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-13 13:19:03,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 13:19:03,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:19:03,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 13:19:03,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:19:03,908 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:19:03,908 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:19:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:19:04,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:19:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:19:05,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:19:05,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613239684] [2022-12-13 13:19:05,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613239684] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:19:05,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:19:05,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 13:19:05,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845391830] [2022-12-13 13:19:05,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:19:05,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:19:05,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:19:05,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:19:05,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:19:13,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 354 [2022-12-13 13:19:13,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 110 transitions, 1021 flow. Second operand has 16 states, 16 states have (on average 142.25) internal successors, (2276), 16 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:13,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:19:13,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 354 [2022-12-13 13:19:13,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:19:32,901 INFO L130 PetriNetUnfolder]: 53583/80465 cut-off events. [2022-12-13 13:19:32,901 INFO L131 PetriNetUnfolder]: For 404465/424424 co-relation queries the response was YES. [2022-12-13 13:19:33,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349964 conditions, 80465 events. 53583/80465 cut-off events. For 404465/424424 co-relation queries the response was YES. Maximal size of possible extension queue 1588. Compared 586291 event pairs, 3994 based on Foata normal form. 16642/97088 useless extension candidates. Maximal degree in co-relation 349894. Up to 14599 conditions per place. [2022-12-13 13:19:33,737 INFO L137 encePairwiseOnDemand]: 348/354 looper letters, 327 selfloop transitions, 33 changer transitions 0/363 dead transitions. [2022-12-13 13:19:33,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 363 transitions, 3312 flow [2022-12-13 13:19:33,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 13:19:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 13:19:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2161 transitions. [2022-12-13 13:19:33,741 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4360371267150928 [2022-12-13 13:19:33,741 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2161 transitions. [2022-12-13 13:19:33,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2161 transitions. [2022-12-13 13:19:33,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:19:33,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2161 transitions. [2022-12-13 13:19:33,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 154.35714285714286) internal successors, (2161), 14 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:33,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 354.0) internal successors, (5310), 15 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:33,746 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 354.0) internal successors, (5310), 15 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:33,746 INFO L175 Difference]: Start difference. First operand has 177 places, 110 transitions, 1021 flow. Second operand 14 states and 2161 transitions. [2022-12-13 13:19:33,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 363 transitions, 3312 flow [2022-12-13 13:19:38,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 363 transitions, 3256 flow, removed 5 selfloop flow, removed 16 redundant places. [2022-12-13 13:19:38,444 INFO L231 Difference]: Finished difference. Result has 181 places, 117 transitions, 1121 flow [2022-12-13 13:19:38,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1121, PETRI_PLACES=181, PETRI_TRANSITIONS=117} [2022-12-13 13:19:38,445 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 125 predicate places. [2022-12-13 13:19:38,445 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 117 transitions, 1121 flow [2022-12-13 13:19:38,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 142.25) internal successors, (2276), 16 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:38,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:19:38,446 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:19:38,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 13:19:38,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:19:38,647 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:19:38,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:19:38,648 INFO L85 PathProgramCache]: Analyzing trace with hash 796407678, now seen corresponding path program 3 times [2022-12-13 13:19:38,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:19:38,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241844209] [2022-12-13 13:19:38,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:19:38,650 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 [2022-12-13 13:19:38,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:19:38,653 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:19:38,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-13 13:19:38,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 13:19:38,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:19:38,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 13:19:38,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:19:39,000 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:19:39,000 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:19:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:19:39,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:19:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:19:41,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:19:41,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241844209] [2022-12-13 13:19:41,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241844209] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:19:41,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:19:41,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-12-13 13:19:41,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917959832] [2022-12-13 13:19:41,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:19:41,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 13:19:41,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:19:41,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 13:19:41,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-12-13 13:19:56,926 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 354 [2022-12-13 13:19:56,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 117 transitions, 1121 flow. Second operand has 21 states, 21 states have (on average 138.33333333333334) internal successors, (2905), 21 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:56,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:19:56,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 354 [2022-12-13 13:19:56,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:20:21,349 INFO L130 PetriNetUnfolder]: 58631/88640 cut-off events. [2022-12-13 13:20:21,350 INFO L131 PetriNetUnfolder]: For 486203/492231 co-relation queries the response was YES. [2022-12-13 13:20:22,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413078 conditions, 88640 events. 58631/88640 cut-off events. For 486203/492231 co-relation queries the response was YES. Maximal size of possible extension queue 1696. Compared 644360 event pairs, 38148 based on Foata normal form. 5320/93959 useless extension candidates. Maximal degree in co-relation 413005. Up to 69590 conditions per place. [2022-12-13 13:20:22,321 INFO L137 encePairwiseOnDemand]: 346/354 looper letters, 423 selfloop transitions, 45 changer transitions 0/472 dead transitions. [2022-12-13 13:20:22,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 472 transitions, 4677 flow [2022-12-13 13:20:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 13:20:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 13:20:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3537 transitions. [2022-12-13 13:20:22,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4163135593220339 [2022-12-13 13:20:22,327 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3537 transitions. [2022-12-13 13:20:22,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3537 transitions. [2022-12-13 13:20:22,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:20:22,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3537 transitions. [2022-12-13 13:20:22,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 147.375) internal successors, (3537), 24 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:20:22,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 354.0) internal successors, (8850), 25 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:20:22,337 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 354.0) internal successors, (8850), 25 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:20:22,337 INFO L175 Difference]: Start difference. First operand has 181 places, 117 transitions, 1121 flow. Second operand 24 states and 3537 transitions. [2022-12-13 13:20:22,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 472 transitions, 4677 flow [2022-12-13 13:20:25,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 472 transitions, 4351 flow, removed 65 selfloop flow, removed 6 redundant places. [2022-12-13 13:20:25,315 INFO L231 Difference]: Finished difference. Result has 208 places, 132 transitions, 1388 flow [2022-12-13 13:20:25,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1388, PETRI_PLACES=208, PETRI_TRANSITIONS=132} [2022-12-13 13:20:25,316 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 152 predicate places. [2022-12-13 13:20:25,316 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 132 transitions, 1388 flow [2022-12-13 13:20:25,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 138.33333333333334) internal successors, (2905), 21 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:20:25,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:20:25,316 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:20:25,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-13 13:20:25,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:20:25,517 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:20:25,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:20:25,518 INFO L85 PathProgramCache]: Analyzing trace with hash -969745871, now seen corresponding path program 4 times [2022-12-13 13:20:25,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:20:25,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876620523] [2022-12-13 13:20:25,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:20:25,520 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 [2022-12-13 13:20:25,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:20:25,523 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:20:25,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-13 13:20:25,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:20:25,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:20:25,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 13:20:25,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:20:25,790 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:20:25,790 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:20:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:20:26,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:20:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:20:27,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:20:27,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876620523] [2022-12-13 13:20:27,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876620523] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:20:27,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:20:27,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 13:20:27,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352697614] [2022-12-13 13:20:27,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:20:27,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:20:27,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:20:27,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:20:27,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:20:37,249 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 354 [2022-12-13 13:20:37,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 132 transitions, 1388 flow. Second operand has 16 states, 16 states have (on average 142.5) internal successors, (2280), 16 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:20:37,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:20:37,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 354 [2022-12-13 13:20:37,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:21:15,916 INFO L130 PetriNetUnfolder]: 126047/197599 cut-off events. [2022-12-13 13:21:15,916 INFO L131 PetriNetUnfolder]: For 1173827/1187521 co-relation queries the response was YES. [2022-12-13 13:21:17,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929825 conditions, 197599 events. 126047/197599 cut-off events. For 1173827/1187521 co-relation queries the response was YES. Maximal size of possible extension queue 3816. Compared 1704780 event pairs, 13548 based on Foata normal form. 28052/225632 useless extension candidates. Maximal degree in co-relation 929742. Up to 28236 conditions per place. [2022-12-13 13:21:18,657 INFO L137 encePairwiseOnDemand]: 348/354 looper letters, 426 selfloop transitions, 56 changer transitions 0/486 dead transitions. [2022-12-13 13:21:18,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 486 transitions, 5153 flow [2022-12-13 13:21:18,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 13:21:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 13:21:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2145 transitions. [2022-12-13 13:21:18,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4328087167070218 [2022-12-13 13:21:18,662 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2145 transitions. [2022-12-13 13:21:18,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2145 transitions. [2022-12-13 13:21:18,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:21:18,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2145 transitions. [2022-12-13 13:21:18,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 153.21428571428572) internal successors, (2145), 14 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:21:18,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 354.0) internal successors, (5310), 15 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:21:18,668 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 354.0) internal successors, (5310), 15 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:21:18,668 INFO L175 Difference]: Start difference. First operand has 208 places, 132 transitions, 1388 flow. Second operand 14 states and 2145 transitions. [2022-12-13 13:21:18,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 486 transitions, 5153 flow [2022-12-13 13:21:32,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 486 transitions, 5094 flow, removed 20 selfloop flow, removed 7 redundant places. [2022-12-13 13:21:32,715 INFO L231 Difference]: Finished difference. Result has 221 places, 143 transitions, 1672 flow [2022-12-13 13:21:32,715 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1672, PETRI_PLACES=221, PETRI_TRANSITIONS=143} [2022-12-13 13:21:32,715 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 165 predicate places. [2022-12-13 13:21:32,715 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 143 transitions, 1672 flow [2022-12-13 13:21:32,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 142.5) internal successors, (2280), 16 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:21:32,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:21:32,716 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 1, 1, 1, 1, 1] [2022-12-13 13:21:32,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-13 13:21:32,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:21:32,917 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:21:32,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:21:32,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1389363195, now seen corresponding path program 6 times [2022-12-13 13:21:32,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:21:32,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065260228] [2022-12-13 13:21:32,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:21:32,919 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 [2022-12-13 13:21:32,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:21:32,922 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:21:32,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-13 13:21:33,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 13:21:33,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:21:33,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 13:21:33,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:21:33,479 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:21:33,479 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:21:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:21:34,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:21:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:21:35,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:21:35,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065260228] [2022-12-13 13:21:35,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065260228] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:21:35,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:21:35,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-12-13 13:21:35,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654869278] [2022-12-13 13:21:35,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:21:35,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 13:21:35,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:21:35,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 13:21:35,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-12-13 13:21:48,909 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 354 [2022-12-13 13:21:48,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 143 transitions, 1672 flow. Second operand has 26 states, 26 states have (on average 139.15384615384616) internal successors, (3618), 26 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:21:48,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:21:48,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 354 [2022-12-13 13:21:48,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:22:37,163 INFO L130 PetriNetUnfolder]: 117701/184663 cut-off events. [2022-12-13 13:22:37,164 INFO L131 PetriNetUnfolder]: For 1333951/1358155 co-relation queries the response was YES. [2022-12-13 13:22:39,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951358 conditions, 184663 events. 117701/184663 cut-off events. For 1333951/1358155 co-relation queries the response was YES. Maximal size of possible extension queue 3562. Compared 1566566 event pairs, 99236 based on Foata normal form. 13827/198482 useless extension candidates. Maximal degree in co-relation 951268. Up to 168621 conditions per place. [2022-12-13 13:22:39,977 INFO L137 encePairwiseOnDemand]: 348/354 looper letters, 655 selfloop transitions, 39 changer transitions 0/699 dead transitions. [2022-12-13 13:22:39,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 699 transitions, 8299 flow [2022-12-13 13:22:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 13:22:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 13:22:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4932 transitions. [2022-12-13 13:22:39,984 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4221879815100154 [2022-12-13 13:22:39,984 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4932 transitions. [2022-12-13 13:22:39,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4932 transitions. [2022-12-13 13:22:39,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:22:39,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4932 transitions. [2022-12-13 13:22:39,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 149.45454545454547) internal successors, (4932), 33 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:22:39,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 354.0) internal successors, (12036), 34 states have internal predecessors, (12036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:22:39,998 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 354.0) internal successors, (12036), 34 states have internal predecessors, (12036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:22:39,998 INFO L175 Difference]: Start difference. First operand has 221 places, 143 transitions, 1672 flow. Second operand 33 states and 4932 transitions. [2022-12-13 13:22:39,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 699 transitions, 8299 flow [2022-12-13 13:22:56,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 699 transitions, 7252 flow, removed 400 selfloop flow, removed 6 redundant places. [2022-12-13 13:22:56,111 INFO L231 Difference]: Finished difference. Result has 251 places, 155 transitions, 1756 flow [2022-12-13 13:22:56,111 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1756, PETRI_PLACES=251, PETRI_TRANSITIONS=155} [2022-12-13 13:22:56,111 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 195 predicate places. [2022-12-13 13:22:56,111 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 155 transitions, 1756 flow [2022-12-13 13:22:56,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 139.15384615384616) internal successors, (3618), 26 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:22:56,112 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:22:56,112 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:22:56,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-13 13:22:56,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:22:56,313 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:22:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:22:56,314 INFO L85 PathProgramCache]: Analyzing trace with hash -2042248524, now seen corresponding path program 5 times [2022-12-13 13:22:56,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:22:56,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699978192] [2022-12-13 13:22:56,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:22:56,316 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 [2022-12-13 13:22:56,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:22:56,319 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:22:56,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-13 13:22:56,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 13:22:56,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:22:56,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 13:22:56,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:22:56,656 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:22:56,656 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:22:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:22:57,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:23:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:23:00,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:23:00,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699978192] [2022-12-13 13:23:00,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699978192] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:23:00,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:23:00,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 30 [2022-12-13 13:23:00,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721878537] [2022-12-13 13:23:00,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:23:00,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 13:23:00,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:23:00,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 13:23:00,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-12-13 13:23:30,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 354 [2022-12-13 13:23:30,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 155 transitions, 1756 flow. Second operand has 31 states, 31 states have (on average 138.25806451612902) internal successors, (4286), 31 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:23:30,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:23:30,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 354 [2022-12-13 13:23:30,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:24:28,283 INFO L130 PetriNetUnfolder]: 118855/187003 cut-off events. [2022-12-13 13:24:28,284 INFO L131 PetriNetUnfolder]: For 1175182/1191341 co-relation queries the response was YES. [2022-12-13 13:24:30,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882057 conditions, 187003 events. 118855/187003 cut-off events. For 1175182/1191341 co-relation queries the response was YES. Maximal size of possible extension queue 3810. Compared 1599354 event pairs, 89656 based on Foata normal form. 12346/199346 useless extension candidates. Maximal degree in co-relation 881963. Up to 147257 conditions per place. [2022-12-13 13:24:31,101 INFO L137 encePairwiseOnDemand]: 346/354 looper letters, 684 selfloop transitions, 60 changer transitions 0/750 dead transitions. [2022-12-13 13:24:31,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 750 transitions, 7581 flow [2022-12-13 13:24:31,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 13:24:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 13:24:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5460 transitions. [2022-12-13 13:24:31,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4168575355016033 [2022-12-13 13:24:31,109 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5460 transitions. [2022-12-13 13:24:31,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5460 transitions. [2022-12-13 13:24:31,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:24:31,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5460 transitions. [2022-12-13 13:24:31,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 147.56756756756758) internal successors, (5460), 37 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:24:31,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 354.0) internal successors, (13452), 38 states have internal predecessors, (13452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:24:31,129 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 354.0) internal successors, (13452), 38 states have internal predecessors, (13452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:24:31,129 INFO L175 Difference]: Start difference. First operand has 251 places, 155 transitions, 1756 flow. Second operand 37 states and 5460 transitions. [2022-12-13 13:24:31,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 750 transitions, 7581 flow [2022-12-13 13:24:44,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 750 transitions, 6997 flow, removed 213 selfloop flow, removed 21 redundant places. [2022-12-13 13:24:44,945 INFO L231 Difference]: Finished difference. Result has 278 places, 160 transitions, 1835 flow [2022-12-13 13:24:44,945 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1835, PETRI_PLACES=278, PETRI_TRANSITIONS=160} [2022-12-13 13:24:44,946 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 222 predicate places. [2022-12-13 13:24:44,946 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 160 transitions, 1835 flow [2022-12-13 13:24:44,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 138.25806451612902) internal successors, (4286), 31 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:24:44,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:24:44,946 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 6, 1, 1, 1, 1, 1] [2022-12-13 13:24:44,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-13 13:24:45,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:24:45,147 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:24:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:24:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash 809042021, now seen corresponding path program 7 times [2022-12-13 13:24:45,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:24:45,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284969747] [2022-12-13 13:24:45,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 13:24:45,150 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 [2022-12-13 13:24:45,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:24:45,153 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:24:45,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-13 13:24:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:24:45,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 13:24:45,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:24:45,421 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:24:45,422 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:24:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:24:46,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:24:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:24:50,833 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:24:50,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284969747] [2022-12-13 13:24:50,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284969747] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:24:50,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:24:50,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 36 [2022-12-13 13:24:50,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474104699] [2022-12-13 13:24:50,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:24:50,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 13:24:50,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:24:50,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 13:24:50,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 13:25:37,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 354 [2022-12-13 13:25:37,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 160 transitions, 1835 flow. Second operand has 37 states, 37 states have (on average 137.1081081081081) internal successors, (5073), 37 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:25:37,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:25:37,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 354 [2022-12-13 13:25:37,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:26:53,530 INFO L130 PetriNetUnfolder]: 117195/184546 cut-off events. [2022-12-13 13:26:53,530 INFO L131 PetriNetUnfolder]: For 1332197/1356254 co-relation queries the response was YES. [2022-12-13 13:26:55,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860653 conditions, 184546 events. 117195/184546 cut-off events. For 1332197/1356254 co-relation queries the response was YES. Maximal size of possible extension queue 3747. Compared 1584982 event pairs, 87302 based on Foata normal form. 13639/198108 useless extension candidates. Maximal degree in co-relation 860551. Up to 146139 conditions per place. [2022-12-13 13:26:56,501 INFO L137 encePairwiseOnDemand]: 346/354 looper letters, 1220 selfloop transitions, 110 changer transitions 0/1336 dead transitions. [2022-12-13 13:26:56,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1336 transitions, 14470 flow [2022-12-13 13:26:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-13 13:26:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-12-13 13:26:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 9039 transitions. [2022-12-13 13:26:56,511 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.418588496804668 [2022-12-13 13:26:56,512 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 9039 transitions. [2022-12-13 13:26:56,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 9039 transitions. [2022-12-13 13:26:56,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:26:56,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 9039 transitions. [2022-12-13 13:26:56,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 148.18032786885246) internal successors, (9039), 61 states have internal predecessors, (9039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:26:56,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 354.0) internal successors, (21948), 62 states have internal predecessors, (21948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:26:56,540 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 354.0) internal successors, (21948), 62 states have internal predecessors, (21948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:26:56,540 INFO L175 Difference]: Start difference. First operand has 278 places, 160 transitions, 1835 flow. Second operand 61 states and 9039 transitions. [2022-12-13 13:26:56,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1336 transitions, 14470 flow [2022-12-13 13:27:14,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 1336 transitions, 13771 flow, removed 304 selfloop flow, removed 20 redundant places. [2022-12-13 13:27:14,561 INFO L231 Difference]: Finished difference. Result has 327 places, 218 transitions, 2730 flow [2022-12-13 13:27:14,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=2730, PETRI_PLACES=327, PETRI_TRANSITIONS=218} [2022-12-13 13:27:14,561 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 271 predicate places. [2022-12-13 13:27:14,561 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 218 transitions, 2730 flow [2022-12-13 13:27:14,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 137.1081081081081) internal successors, (5073), 37 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:14,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:27:14,562 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:27:14,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-13 13:27:14,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:27:14,763 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:27:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:27:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash -644286914, now seen corresponding path program 6 times [2022-12-13 13:27:14,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:27:14,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864933954] [2022-12-13 13:27:14,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:27:14,766 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 [2022-12-13 13:27:14,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:27:14,769 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:27:14,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b50163c-3fff-4e83-8223-0351ce9797be/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-13 13:27:15,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 13:27:15,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:27:15,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 13:27:15,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:27:15,386 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:27:15,387 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:27:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 53 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 13:27:16,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:27:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 13:27:20,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:27:20,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864933954] [2022-12-13 13:27:20,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864933954] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:27:20,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:27:20,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-12-13 13:27:20,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523071750] [2022-12-13 13:27:20,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:27:20,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 13:27:20,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:27:20,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 13:27:20,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-12-13 13:27:38,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 354 [2022-12-13 13:27:38,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 218 transitions, 2730 flow. Second operand has 22 states, 22 states have (on average 139.54545454545453) internal successors, (3070), 22 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:38,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:27:38,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 354 [2022-12-13 13:27:38,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:27:52,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:27:56,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:28:06,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:28:09,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:28:14,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:28:16,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:28:23,407 WARN L233 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 77 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:28:26,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:28:29,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:28:51,169 WARN L233 SmtUtils]: Spent 14.34s on a formula simplification. DAG size of input: 78 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:28:53,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]