./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R --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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --- 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-38b53e6 [2022-11-25 17:48:20,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:48:20,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:48:20,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:48:20,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:48:20,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:48:20,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:48:20,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:48:20,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:48:20,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:48:20,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:48:20,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:48:20,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:48:20,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:48:20,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:48:20,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:48:20,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:48:20,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:48:20,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:48:20,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:48:20,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:48:20,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:48:20,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:48:20,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:48:20,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:48:20,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:48:20,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:48:20,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:48:20,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:48:20,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:48:20,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:48:20,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:48:20,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:48:20,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:48:20,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:48:20,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:48:20,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:48:20,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:48:20,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:48:20,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:48:20,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:48:20,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:48:20,439 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:48:20,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:48:20,440 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:48:20,441 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:48:20,441 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:48:20,442 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:48:20,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:48:20,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:48:20,443 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:48:20,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:48:20,444 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:48:20,444 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:48:20,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:48:20,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:48:20,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:48:20,445 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:48:20,445 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:48:20,446 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:48:20,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:48:20,446 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:48:20,446 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:48:20,446 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:48:20,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:48:20,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:48:20,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:48:20,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:48:20,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:48:20,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:48:20,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:48:20,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:48:20,449 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:48:20,449 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:48:20,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:48:20,450 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_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2022-11-25 17:48:20,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:48:20,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:48:20,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:48:20,848 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:48:20,849 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:48:20,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-25 17:48:23,937 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:48:24,127 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:48:24,128 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-25 17:48:24,135 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/data/de7178c15/d5711271d9b64d29981d62f73dc67b2f/FLAG95bcc856a [2022-11-25 17:48:24,150 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/data/de7178c15/d5711271d9b64d29981d62f73dc67b2f [2022-11-25 17:48:24,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:48:24,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:48:24,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:48:24,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:48:24,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:48:24,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:48:24" (1/1) ... [2022-11-25 17:48:24,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65945b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:24, skipping insertion in model container [2022-11-25 17:48:24,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:48:24" (1/1) ... [2022-11-25 17:48:24,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:48:24,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:48:24,410 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:24,413 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:24,414 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:24,414 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:24,418 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:24,419 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:24,419 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:24,421 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:24,422 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:24,423 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:24,436 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_6faa15db-0b62-45f4-96b3-3a70b4f787b3/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-25 17:48:24,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:48:24,458 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-25 17:48:24,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@30146d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:24, skipping insertion in model container [2022-11-25 17:48:24,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:48:24,465 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 17:48:24,467 INFO L158 Benchmark]: Toolchain (without parser) took 311.67ms. Allocated memory was 138.4MB in the beginning and 190.8MB in the end (delta: 52.4MB). Free memory was 74.2MB in the beginning and 154.2MB in the end (delta: -80.0MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. [2022-11-25 17:48:24,468 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 138.4MB. Free memory was 107.8MB in the beginning and 107.7MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:48:24,470 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.16ms. Allocated memory was 138.4MB in the beginning and 190.8MB in the end (delta: 52.4MB). Free memory was 74.1MB in the beginning and 154.2MB in the end (delta: -80.1MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. [2022-11-25 17:48:24,472 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 138.4MB. Free memory was 107.8MB in the beginning and 107.7MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.16ms. Allocated memory was 138.4MB in the beginning and 190.8MB in the end (delta: 52.4MB). Free memory was 74.1MB in the beginning and 154.2MB in the end (delta: -80.1MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R --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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --- 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-38b53e6 [2022-11-25 17:48:26,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:48:26,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:48:26,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:48:26,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:48:26,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:48:26,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:48:26,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:48:26,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:48:26,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:48:26,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:48:26,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:48:26,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:48:26,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:48:26,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:48:26,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:48:26,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:48:26,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:48:26,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:48:26,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:48:26,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:48:26,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:48:26,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:48:26,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:48:26,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:48:26,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:48:26,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:48:26,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:48:26,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:48:26,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:48:26,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:48:26,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:48:26,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:48:26,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:48:26,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:48:26,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:48:26,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:48:26,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:48:26,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:48:26,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:48:26,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:48:26,684 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:48:26,729 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:48:26,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:48:26,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:48:26,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:48:26,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:48:26,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:48:26,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:48:26,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:48:26,731 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:48:26,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:48:26,732 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:48:26,732 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:48:26,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:48:26,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:48:26,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:48:26,733 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:48:26,733 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:48:26,733 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:48:26,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:48:26,734 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:48:26,734 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:48:26,734 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:48:26,734 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:48:26,734 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:48:26,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:48:26,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:48:26,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:48:26,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:48:26,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:48:26,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:48:26,736 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:48:26,736 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:48:26,736 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:48:26,736 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:48:26,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:48:26,737 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:48:26,737 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_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2022-11-25 17:48:27,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:48:27,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:48:27,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:48:27,130 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:48:27,130 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:48:27,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-25 17:48:30,206 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:48:30,511 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:48:30,512 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-25 17:48:30,520 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/data/932d39de0/3cebf2a2d6b247ffae29378cd7bbcfdd/FLAG6cee3eef0 [2022-11-25 17:48:30,543 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/data/932d39de0/3cebf2a2d6b247ffae29378cd7bbcfdd [2022-11-25 17:48:30,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:48:30,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:48:30,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:48:30,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:48:30,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:48:30,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:48:30" (1/1) ... [2022-11-25 17:48:30,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f4c6e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:30, skipping insertion in model container [2022-11-25 17:48:30,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:48:30" (1/1) ... [2022-11-25 17:48:30,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:48:30,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:48:30,821 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,829 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:30,832 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,833 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:30,837 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,838 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:30,839 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,843 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:30,851 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,852 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:30,863 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_6faa15db-0b62-45f4-96b3-3a70b4f787b3/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-25 17:48:30,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:48:30,902 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 17:48:30,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:48:30,925 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,931 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:30,932 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,933 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:30,933 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,934 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:30,935 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,936 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:30,943 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,944 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:30,948 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_6faa15db-0b62-45f4-96b3-3a70b4f787b3/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-25 17:48:30,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:48:30,963 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:48:30,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,987 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:30,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:30,989 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,990 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:30,990 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,991 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:30,991 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:48:30,992 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:48:31,002 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_6faa15db-0b62-45f4-96b3-3a70b4f787b3/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-25 17:48:31,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:48:31,023 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:48:31,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:31 WrapperNode [2022-11-25 17:48:31,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:48:31,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:48:31,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:48:31,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:48:31,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:31" (1/1) ... [2022-11-25 17:48:31,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:31" (1/1) ... [2022-11-25 17:48:31,091 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 186 [2022-11-25 17:48:31,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:48:31,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:48:31,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:48:31,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:48:31,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:31" (1/1) ... [2022-11-25 17:48:31,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:31" (1/1) ... [2022-11-25 17:48:31,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:31" (1/1) ... [2022-11-25 17:48:31,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:31" (1/1) ... [2022-11-25 17:48:31,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:31" (1/1) ... [2022-11-25 17:48:31,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:31" (1/1) ... [2022-11-25 17:48:31,123 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:31" (1/1) ... [2022-11-25 17:48:31,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:31" (1/1) ... [2022-11-25 17:48:31,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:48:31,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:48:31,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:48:31,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:48:31,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:31" (1/1) ... [2022-11-25 17:48:31,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:48:31,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:48:31,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:48:31,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:48:31,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:48:31,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:48:31,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:48:31,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:48:31,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:48:31,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:48:31,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:48:31,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:48:31,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:48:31,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:48:31,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:48:31,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:48:31,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:48:31,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:48:31,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:48:31,290 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:48:31,410 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:48:31,412 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:48:32,161 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:48:32,397 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:48:32,399 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:48:32,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:48:32 BoogieIcfgContainer [2022-11-25 17:48:32,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:48:32,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:48:32,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:48:32,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:48:32,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:48:30" (1/3) ... [2022-11-25 17:48:32,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b8d59ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:48:32, skipping insertion in model container [2022-11-25 17:48:32,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:31" (2/3) ... [2022-11-25 17:48:32,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b8d59ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:48:32, skipping insertion in model container [2022-11-25 17:48:32,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:48:32" (3/3) ... [2022-11-25 17:48:32,415 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2022-11-25 17:48:32,436 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:48:32,436 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-25 17:48:32,436 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:48:32,567 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:48:32,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 212 transitions, 440 flow [2022-11-25 17:48:32,704 INFO L130 PetriNetUnfolder]: 15/210 cut-off events. [2022-11-25 17:48:32,704 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:48:32,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 210 events. 15/210 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 209 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 166. Up to 2 conditions per place. [2022-11-25 17:48:32,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 212 transitions, 440 flow [2022-11-25 17:48:32,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 205 transitions, 422 flow [2022-11-25 17:48:32,728 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:48:32,760 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 205 transitions, 422 flow [2022-11-25 17:48:32,769 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 205 transitions, 422 flow [2022-11-25 17:48:32,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 205 transitions, 422 flow [2022-11-25 17:48:32,816 INFO L130 PetriNetUnfolder]: 15/205 cut-off events. [2022-11-25 17:48:32,816 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:48:32,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 205 events. 15/205 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 212 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 166. Up to 2 conditions per place. [2022-11-25 17:48:32,819 INFO L119 LiptonReduction]: Number of co-enabled transitions 1390 [2022-11-25 17:49:04,631 INFO L134 LiptonReduction]: Checked pairs total: 3006 [2022-11-25 17:49:04,631 INFO L136 LiptonReduction]: Total number of compositions: 232 [2022-11-25 17:49:04,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:49:04,654 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;@11c9452e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:49:04,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-11-25 17:49:04,658 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:49:04,659 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:49:04,659 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:04,659 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:49:04,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:49:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:04,666 INFO L85 PathProgramCache]: Analyzing trace with hash 28050, now seen corresponding path program 1 times [2022-11-25 17:49:04,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:49:04,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528726691] [2022-11-25 17:49:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:04,679 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:04,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:49:04,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:49:04,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 17:49:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:04,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:49:04,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:49:04,974 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:49:04,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 17:49:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:49:05,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:49:05,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:49:05,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528726691] [2022-11-25 17:49:05,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528726691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:05,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:05,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:49:05,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196755849] [2022-11-25 17:49:05,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:05,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:49:05,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:49:05,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:49:05,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:49:05,355 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 444 [2022-11-25 17:49:05,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:05,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:05,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 444 [2022-11-25 17:49:05,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:05,915 INFO L130 PetriNetUnfolder]: 569/872 cut-off events. [2022-11-25 17:49:05,915 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-25 17:49:05,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1771 conditions, 872 events. 569/872 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 4036 event pairs, 348 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 1609. Up to 859 conditions per place. [2022-11-25 17:49:05,929 INFO L137 encePairwiseOnDemand]: 432/444 looper letters, 46 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2022-11-25 17:49:05,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 214 flow [2022-11-25 17:49:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:49:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:49:05,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2022-11-25 17:49:05,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2022-11-25 17:49:05,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2022-11-25 17:49:05,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2022-11-25 17:49:05,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:05,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2022-11-25 17:49:05,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:05,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:05,979 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:05,981 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 3 states and 592 transitions. [2022-11-25 17:49:05,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 214 flow [2022-11-25 17:49:05,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:49:05,989 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 130 flow [2022-11-25 17:49:05,991 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2022-11-25 17:49:05,997 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2022-11-25 17:49:05,997 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 130 flow [2022-11-25 17:49:05,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:05,998 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:05,999 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:49:06,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-25 17:49:06,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:06,211 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:49:06,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:06,213 INFO L85 PathProgramCache]: Analyzing trace with hash 28049, now seen corresponding path program 1 times [2022-11-25 17:49:06,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:49:06,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064897748] [2022-11-25 17:49:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:06,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:06,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:49:06,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:49:06,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 17:49:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:06,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:49:06,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:49:06,350 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 17:49:06,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 17:49:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:49:06,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:49:06,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:49:06,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064897748] [2022-11-25 17:49:06,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064897748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:06,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:06,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:49:06,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41520826] [2022-11-25 17:49:06,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:06,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:49:06,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:49:06,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:49:06,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:49:06,549 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 444 [2022-11-25 17:49:06,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:06,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:06,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 444 [2022-11-25 17:49:06,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:06,939 INFO L130 PetriNetUnfolder]: 569/866 cut-off events. [2022-11-25 17:49:06,940 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:49:06,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1757 conditions, 866 events. 569/866 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 4018 event pairs, 348 based on Foata normal form. 2/281 useless extension candidates. Maximal degree in co-relation 1726. Up to 859 conditions per place. [2022-11-25 17:49:06,945 INFO L137 encePairwiseOnDemand]: 440/444 looper letters, 42 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-11-25 17:49:06,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 210 flow [2022-11-25 17:49:06,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:49:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:49:06,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2022-11-25 17:49:06,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43318318318318316 [2022-11-25 17:49:06,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2022-11-25 17:49:06,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2022-11-25 17:49:06,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:06,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2022-11-25 17:49:06,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:06,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:06,956 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:06,956 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 130 flow. Second operand 3 states and 577 transitions. [2022-11-25 17:49:06,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 210 flow [2022-11-25 17:49:06,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:49:06,959 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 118 flow [2022-11-25 17:49:06,959 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2022-11-25 17:49:06,961 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2022-11-25 17:49:06,961 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 118 flow [2022-11-25 17:49:06,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:06,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:06,964 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:49:06,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:49:07,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:07,175 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:49:07,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash 876505, now seen corresponding path program 1 times [2022-11-25 17:49:07,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:49:07,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319207146] [2022-11-25 17:49:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:07,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:07,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:49:07,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:49:07,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 17:49:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:07,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:49:07,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:49:07,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 17:49:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:49:07,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:49:07,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:49:07,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319207146] [2022-11-25 17:49:07,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319207146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:07,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:07,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:49:07,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102573689] [2022-11-25 17:49:07,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:07,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:49:07,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:49:07,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:49:07,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:49:07,532 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 444 [2022-11-25 17:49:07,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:07,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:07,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 444 [2022-11-25 17:49:07,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:07,913 INFO L130 PetriNetUnfolder]: 569/864 cut-off events. [2022-11-25 17:49:07,913 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:49:07,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1750 conditions, 864 events. 569/864 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 3982 event pairs, 348 based on Foata normal form. 2/277 useless extension candidates. Maximal degree in co-relation 1742. Up to 853 conditions per place. [2022-11-25 17:49:07,919 INFO L137 encePairwiseOnDemand]: 442/444 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2022-11-25 17:49:07,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 200 flow [2022-11-25 17:49:07,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:49:07,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:49:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 574 transitions. [2022-11-25 17:49:07,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43093093093093093 [2022-11-25 17:49:07,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 574 transitions. [2022-11-25 17:49:07,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 574 transitions. [2022-11-25 17:49:07,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:07,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 574 transitions. [2022-11-25 17:49:07,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:07,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:07,929 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:07,929 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 118 flow. Second operand 3 states and 574 transitions. [2022-11-25 17:49:07,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 200 flow [2022-11-25 17:49:07,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:49:07,931 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 119 flow [2022-11-25 17:49:07,932 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2022-11-25 17:49:07,932 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2022-11-25 17:49:07,933 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 119 flow [2022-11-25 17:49:07,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:07,933 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:07,933 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:49:07,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:49:08,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:08,145 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:49:08,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:08,146 INFO L85 PathProgramCache]: Analyzing trace with hash 875745, now seen corresponding path program 1 times [2022-11-25 17:49:08,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:49:08,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571542352] [2022-11-25 17:49:08,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:08,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:08,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:49:08,148 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:49:08,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 17:49:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:08,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:49:08,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:49:08,300 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:49:08,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 17:49:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:49:08,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:49:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:49:08,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:49:08,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571542352] [2022-11-25 17:49:08,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571542352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:49:08,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:49:08,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 17:49:08,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338191716] [2022-11-25 17:49:08,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:49:08,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:49:08,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:49:08,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:49:08,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:49:10,348 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 444 [2022-11-25 17:49:10,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:10,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:10,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 444 [2022-11-25 17:49:10,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:12,187 INFO L130 PetriNetUnfolder]: 1144/1734 cut-off events. [2022-11-25 17:49:12,188 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:49:12,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3518 conditions, 1734 events. 1144/1734 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 9165 event pairs, 696 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 3510. Up to 856 conditions per place. [2022-11-25 17:49:12,198 INFO L137 encePairwiseOnDemand]: 435/444 looper letters, 71 selfloop transitions, 19 changer transitions 0/91 dead transitions. [2022-11-25 17:49:12,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 91 transitions, 441 flow [2022-11-25 17:49:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:49:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:49:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1104 transitions. [2022-11-25 17:49:12,203 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4144144144144144 [2022-11-25 17:49:12,203 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1104 transitions. [2022-11-25 17:49:12,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1104 transitions. [2022-11-25 17:49:12,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:12,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1104 transitions. [2022-11-25 17:49:12,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:12,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 444.0) internal successors, (3108), 7 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:12,214 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 444.0) internal successors, (3108), 7 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:12,214 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 119 flow. Second operand 6 states and 1104 transitions. [2022-11-25 17:49:12,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 91 transitions, 441 flow [2022-11-25 17:49:12,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 91 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:49:12,217 INFO L231 Difference]: Finished difference. Result has 51 places, 58 transitions, 277 flow [2022-11-25 17:49:12,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=51, PETRI_TRANSITIONS=58} [2022-11-25 17:49:12,220 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2022-11-25 17:49:12,220 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 58 transitions, 277 flow [2022-11-25 17:49:12,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:12,221 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:12,221 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:49:12,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:49:12,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:12,432 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:49:12,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:12,432 INFO L85 PathProgramCache]: Analyzing trace with hash 27170950, now seen corresponding path program 1 times [2022-11-25 17:49:12,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:49:12,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220856880] [2022-11-25 17:49:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:12,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:12,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:49:12,436 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:49:12,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 17:49:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:12,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:49:12,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:49:12,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:49:12,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:49:12,638 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:49:12,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 17:49:12,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 17:49:12,762 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:49:12,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-25 17:49:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:49:12,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:49:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:49:13,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:49:13,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220856880] [2022-11-25 17:49:13,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220856880] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:49:13,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:49:13,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2022-11-25 17:49:13,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191667078] [2022-11-25 17:49:13,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:13,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:49:13,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:49:13,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:49:13,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:49:14,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 444 [2022-11-25 17:49:14,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 58 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:14,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:14,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 444 [2022-11-25 17:49:14,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:15,144 INFO L130 PetriNetUnfolder]: 860/1338 cut-off events. [2022-11-25 17:49:15,145 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:49:15,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 1338 events. 860/1338 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 6894 event pairs, 522 based on Foata normal form. 0/477 useless extension candidates. Maximal degree in co-relation 2760. Up to 1312 conditions per place. [2022-11-25 17:49:15,157 INFO L137 encePairwiseOnDemand]: 439/444 looper letters, 46 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2022-11-25 17:49:15,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 54 transitions, 357 flow [2022-11-25 17:49:15,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:49:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:49:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 880 transitions. [2022-11-25 17:49:15,162 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3963963963963964 [2022-11-25 17:49:15,162 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 880 transitions. [2022-11-25 17:49:15,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 880 transitions. [2022-11-25 17:49:15,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:15,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 880 transitions. [2022-11-25 17:49:15,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:15,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:15,172 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:15,172 INFO L175 Difference]: Start difference. First operand has 51 places, 58 transitions, 277 flow. Second operand 5 states and 880 transitions. [2022-11-25 17:49:15,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 54 transitions, 357 flow [2022-11-25 17:49:15,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 54 transitions, 342 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 17:49:15,180 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 250 flow [2022-11-25 17:49:15,181 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2022-11-25 17:49:15,184 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-11-25 17:49:15,185 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 250 flow [2022-11-25 17:49:15,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:15,185 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:15,186 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:49:15,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:49:15,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:15,398 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:49:15,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:15,398 INFO L85 PathProgramCache]: Analyzing trace with hash 27170951, now seen corresponding path program 1 times [2022-11-25 17:49:15,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:49:15,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559094512] [2022-11-25 17:49:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:15,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:15,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:49:15,400 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:49:15,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 17:49:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:15,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:49:15,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:49:15,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:49:15,609 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 17:49:15,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-25 17:49:15,679 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:49:15,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:49:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:49:15,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:49:15,707 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:49:15,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559094512] [2022-11-25 17:49:15,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559094512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:15,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:15,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:49:15,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586869255] [2022-11-25 17:49:15,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:15,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:49:15,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:49:15,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:49:15,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:49:15,897 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 444 [2022-11-25 17:49:15,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:15,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:15,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 444 [2022-11-25 17:49:15,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:16,239 INFO L130 PetriNetUnfolder]: 576/942 cut-off events. [2022-11-25 17:49:16,239 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 17:49:16,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1969 conditions, 942 events. 576/942 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 4748 event pairs, 348 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 1955. Up to 928 conditions per place. [2022-11-25 17:49:16,245 INFO L137 encePairwiseOnDemand]: 441/444 looper letters, 48 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2022-11-25 17:49:16,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 324 flow [2022-11-25 17:49:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:49:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:49:16,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 580 transitions. [2022-11-25 17:49:16,248 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43543543543543545 [2022-11-25 17:49:16,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 580 transitions. [2022-11-25 17:49:16,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 580 transitions. [2022-11-25 17:49:16,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:16,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 580 transitions. [2022-11-25 17:49:16,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:16,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:16,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:16,254 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 250 flow. Second operand 3 states and 580 transitions. [2022-11-25 17:49:16,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 324 flow [2022-11-25 17:49:16,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 315 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 17:49:16,256 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 219 flow [2022-11-25 17:49:16,256 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2022-11-25 17:49:16,257 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2022-11-25 17:49:16,257 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 219 flow [2022-11-25 17:49:16,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:16,258 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:16,258 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:49:16,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:49:16,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:16,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:49:16,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:16,470 INFO L85 PathProgramCache]: Analyzing trace with hash 325667154, now seen corresponding path program 2 times [2022-11-25 17:49:16,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:49:16,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595067009] [2022-11-25 17:49:16,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:49:16,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:16,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:49:16,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:49:16,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 17:49:16,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:49:16,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:49:16,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:49:16,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:49:16,668 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:49:16,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 17:49:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:49:16,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:49:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:49:17,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:49:17,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595067009] [2022-11-25 17:49:17,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595067009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:49:17,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:49:17,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:49:17,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347130420] [2022-11-25 17:49:17,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:49:17,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:49:17,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:49:17,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:49:17,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:49:23,021 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 444 [2022-11-25 17:49:23,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 219 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:23,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:23,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 444 [2022-11-25 17:49:23,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:25,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:49:27,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:49:29,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:49:31,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:49:33,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:49:35,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:49:37,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:49:41,967 INFO L130 PetriNetUnfolder]: 2286/3728 cut-off events. [2022-11-25 17:49:41,968 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-25 17:49:41,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7644 conditions, 3728 events. 2286/3728 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 22951 event pairs, 1392 based on Foata normal form. 10/1557 useless extension candidates. Maximal degree in co-relation 7630. Up to 457 conditions per place. [2022-11-25 17:49:41,991 INFO L137 encePairwiseOnDemand]: 437/444 looper letters, 236 selfloop transitions, 36 changer transitions 0/273 dead transitions. [2022-11-25 17:49:41,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 273 transitions, 1379 flow [2022-11-25 17:49:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:49:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:49:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2832 transitions. [2022-11-25 17:49:42,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4252252252252252 [2022-11-25 17:49:42,000 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2832 transitions. [2022-11-25 17:49:42,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2832 transitions. [2022-11-25 17:49:42,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:42,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2832 transitions. [2022-11-25 17:49:42,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 188.8) internal successors, (2832), 15 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) [2022-11-25 17:49:42,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 444.0) internal successors, (7104), 16 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:42,020 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 444.0) internal successors, (7104), 16 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:42,020 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 219 flow. Second operand 15 states and 2832 transitions. [2022-11-25 17:49:42,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 273 transitions, 1379 flow [2022-11-25 17:49:42,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 273 transitions, 1378 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:49:42,029 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 519 flow [2022-11-25 17:49:42,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=519, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2022-11-25 17:49:42,030 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 21 predicate places. [2022-11-25 17:49:42,030 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 519 flow [2022-11-25 17:49:42,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:42,031 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:42,031 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:49:42,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:49:42,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:42,243 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:49:42,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:42,243 INFO L85 PathProgramCache]: Analyzing trace with hash 341498121, now seen corresponding path program 1 times [2022-11-25 17:49:42,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:49:42,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272787190] [2022-11-25 17:49:42,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:42,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:42,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:49:42,246 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:49:42,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 17:49:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:42,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:49:42,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:49:42,443 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-25 17:49:42,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-25 17:49:42,478 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:49:42,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:49:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:49:42,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:49:42,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:49:42,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272787190] [2022-11-25 17:49:42,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272787190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:42,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:42,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:49:42,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806067906] [2022-11-25 17:49:42,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:42,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:49:42,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:49:42,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:49:42,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:49:42,611 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 444 [2022-11-25 17:49:42,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 519 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:42,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:42,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 444 [2022-11-25 17:49:42,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:43,415 INFO L130 PetriNetUnfolder]: 2126/3440 cut-off events. [2022-11-25 17:49:43,415 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2022-11-25 17:49:43,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7151 conditions, 3440 events. 2126/3440 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 21074 event pairs, 1280 based on Foata normal form. 0/1486 useless extension candidates. Maximal degree in co-relation 7129. Up to 3384 conditions per place. [2022-11-25 17:49:43,440 INFO L137 encePairwiseOnDemand]: 441/444 looper letters, 70 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2022-11-25 17:49:43,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 657 flow [2022-11-25 17:49:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:49:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:49:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2022-11-25 17:49:43,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4294294294294294 [2022-11-25 17:49:43,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2022-11-25 17:49:43,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2022-11-25 17:49:43,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:43,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2022-11-25 17:49:43,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:43,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:43,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:43,448 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 519 flow. Second operand 3 states and 572 transitions. [2022-11-25 17:49:43,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 657 flow [2022-11-25 17:49:43,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 577 flow, removed 22 selfloop flow, removed 4 redundant places. [2022-11-25 17:49:43,455 INFO L231 Difference]: Finished difference. Result has 66 places, 72 transitions, 437 flow [2022-11-25 17:49:43,455 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=437, PETRI_PLACES=66, PETRI_TRANSITIONS=72} [2022-11-25 17:49:43,458 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 17 predicate places. [2022-11-25 17:49:43,458 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 72 transitions, 437 flow [2022-11-25 17:49:43,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:43,458 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:43,459 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:49:43,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:49:43,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:43,676 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:49:43,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:43,677 INFO L85 PathProgramCache]: Analyzing trace with hash 341498119, now seen corresponding path program 1 times [2022-11-25 17:49:43,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:49:43,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185711801] [2022-11-25 17:49:43,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:43,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:43,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:49:43,679 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:49:43,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 17:49:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:43,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:49:43,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:49:43,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:49:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:49:43,870 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:49:43,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 17:49:43,903 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 [2022-11-25 17:49:43,960 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-25 17:49:43,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:49:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:49:44,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:49:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:49:44,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:49:44,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185711801] [2022-11-25 17:49:44,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185711801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:49:44,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:49:44,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2022-11-25 17:49:44,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150963364] [2022-11-25 17:49:44,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:49:44,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:49:44,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:49:44,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:49:44,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:49:46,175 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 444 [2022-11-25 17:49:46,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 72 transitions, 437 flow. Second operand has 9 states, 9 states have (on average 167.33333333333334) internal successors, (1506), 9 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:46,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:46,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 444 [2022-11-25 17:49:46,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:49,348 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, 1] [2022-11-25 17:49:50,003 INFO L130 PetriNetUnfolder]: 1966/3152 cut-off events. [2022-11-25 17:49:50,003 INFO L131 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2022-11-25 17:49:50,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6530 conditions, 3152 events. 1966/3152 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18841 event pairs, 1168 based on Foata normal form. 0/1440 useless extension candidates. Maximal degree in co-relation 6507. Up to 2686 conditions per place. [2022-11-25 17:49:50,032 INFO L137 encePairwiseOnDemand]: 436/444 looper letters, 76 selfloop transitions, 18 changer transitions 0/95 dead transitions. [2022-11-25 17:49:50,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 681 flow [2022-11-25 17:49:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:49:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:49:50,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1560 transitions. [2022-11-25 17:49:50,037 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39039039039039036 [2022-11-25 17:49:50,037 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1560 transitions. [2022-11-25 17:49:50,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1560 transitions. [2022-11-25 17:49:50,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:50,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1560 transitions. [2022-11-25 17:49:50,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.33333333333334) internal successors, (1560), 9 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:50,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 444.0) internal successors, (4440), 10 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:50,051 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 444.0) internal successors, (4440), 10 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:50,052 INFO L175 Difference]: Start difference. First operand has 66 places, 72 transitions, 437 flow. Second operand 9 states and 1560 transitions. [2022-11-25 17:49:50,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 681 flow [2022-11-25 17:49:50,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 680 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:49:50,062 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 481 flow [2022-11-25 17:49:50,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=481, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2022-11-25 17:49:50,064 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 23 predicate places. [2022-11-25 17:49:50,064 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 481 flow [2022-11-25 17:49:50,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 167.33333333333334) internal successors, (1506), 9 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:50,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:50,066 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:49:50,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:49:50,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:50,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:49:50,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:50,279 INFO L85 PathProgramCache]: Analyzing trace with hash 341498028, now seen corresponding path program 1 times [2022-11-25 17:49:50,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:49:50,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090761050] [2022-11-25 17:49:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:50,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:50,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:49:50,282 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:49:50,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 17:49:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:50,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:49:50,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:49:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:49:50,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:49:50,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:49:50,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090761050] [2022-11-25 17:49:50,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090761050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:50,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:50,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:49:50,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107236655] [2022-11-25 17:49:50,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:50,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:49:50,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:49:50,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:49:50,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:49:50,827 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 444 [2022-11-25 17:49:50,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 481 flow. Second operand has 5 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:50,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:50,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 444 [2022-11-25 17:49:50,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:51,945 INFO L130 PetriNetUnfolder]: 3894/6040 cut-off events. [2022-11-25 17:49:51,945 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2022-11-25 17:49:51,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12410 conditions, 6040 events. 3894/6040 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 38704 event pairs, 1032 based on Foata normal form. 0/2760 useless extension candidates. Maximal degree in co-relation 12385. Up to 3585 conditions per place. [2022-11-25 17:49:51,971 INFO L137 encePairwiseOnDemand]: 438/444 looper letters, 78 selfloop transitions, 13 changer transitions 0/92 dead transitions. [2022-11-25 17:49:51,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 92 transitions, 708 flow [2022-11-25 17:49:51,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:49:51,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:49:51,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 758 transitions. [2022-11-25 17:49:51,974 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42680180180180183 [2022-11-25 17:49:51,974 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 758 transitions. [2022-11-25 17:49:51,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 758 transitions. [2022-11-25 17:49:51,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:51,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 758 transitions. [2022-11-25 17:49:51,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.5) internal successors, (758), 4 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:51,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:51,980 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:51,980 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 481 flow. Second operand 4 states and 758 transitions. [2022-11-25 17:49:51,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 92 transitions, 708 flow [2022-11-25 17:49:51,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 92 transitions, 659 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-25 17:49:51,985 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 482 flow [2022-11-25 17:49:51,986 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=482, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2022-11-25 17:49:51,986 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 23 predicate places. [2022-11-25 17:49:51,986 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 482 flow [2022-11-25 17:49:51,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:51,987 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:51,987 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:49:52,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:49:52,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:52,199 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:49:52,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:52,200 INFO L85 PathProgramCache]: Analyzing trace with hash 341498134, now seen corresponding path program 1 times [2022-11-25 17:49:52,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:49:52,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568384871] [2022-11-25 17:49:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:52,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:52,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:49:52,202 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:49:52,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 17:49:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:52,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:49:52,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:49:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:49:52,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:49:52,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:49:52,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568384871] [2022-11-25 17:49:52,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568384871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:52,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:52,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:49:52,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373222069] [2022-11-25 17:49:52,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:52,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:49:52,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:49:52,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:49:52,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:49:52,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 444 [2022-11-25 17:49:52,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 482 flow. Second operand has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:52,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:52,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 444 [2022-11-25 17:49:52,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:53,909 INFO L130 PetriNetUnfolder]: 4368/7096 cut-off events. [2022-11-25 17:49:53,910 INFO L131 PetriNetUnfolder]: For 653/653 co-relation queries the response was YES. [2022-11-25 17:49:53,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15577 conditions, 7096 events. 4368/7096 cut-off events. For 653/653 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 49720 event pairs, 2752 based on Foata normal form. 96/3984 useless extension candidates. Maximal degree in co-relation 15551. Up to 5991 conditions per place. [2022-11-25 17:49:53,956 INFO L137 encePairwiseOnDemand]: 433/444 looper letters, 106 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2022-11-25 17:49:53,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 110 transitions, 942 flow [2022-11-25 17:49:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:49:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:49:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 770 transitions. [2022-11-25 17:49:53,959 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43355855855855857 [2022-11-25 17:49:53,959 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 770 transitions. [2022-11-25 17:49:53,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 770 transitions. [2022-11-25 17:49:53,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:53,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 770 transitions. [2022-11-25 17:49:53,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:53,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:53,966 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:53,967 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 482 flow. Second operand 4 states and 770 transitions. [2022-11-25 17:49:53,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 110 transitions, 942 flow [2022-11-25 17:49:53,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 917 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:49:53,975 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 491 flow [2022-11-25 17:49:53,976 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=491, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2022-11-25 17:49:53,976 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 25 predicate places. [2022-11-25 17:49:53,976 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 491 flow [2022-11-25 17:49:53,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:53,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:53,977 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:49:53,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:49:54,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:54,189 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:49:54,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:54,190 INFO L85 PathProgramCache]: Analyzing trace with hash 341498027, now seen corresponding path program 1 times [2022-11-25 17:49:54,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:49:54,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681340533] [2022-11-25 17:49:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:54,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:54,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:49:54,192 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:49:54,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 17:49:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:54,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:49:54,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:49:54,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 17:49:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:49:54,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:49:54,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:49:54,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681340533] [2022-11-25 17:49:54,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681340533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:54,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:54,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:49:54,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952456640] [2022-11-25 17:49:54,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:54,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:49:54,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:49:54,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:49:54,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:49:54,539 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 444 [2022-11-25 17:49:54,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 491 flow. Second operand has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:54,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:54,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 444 [2022-11-25 17:49:54,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:55,679 INFO L130 PetriNetUnfolder]: 3584/5824 cut-off events. [2022-11-25 17:49:55,679 INFO L131 PetriNetUnfolder]: For 1193/1217 co-relation queries the response was YES. [2022-11-25 17:49:55,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15028 conditions, 5824 events. 3584/5824 cut-off events. For 1193/1217 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 39275 event pairs, 2200 based on Foata normal form. 0/4248 useless extension candidates. Maximal degree in co-relation 15001. Up to 5708 conditions per place. [2022-11-25 17:49:55,711 INFO L137 encePairwiseOnDemand]: 440/444 looper letters, 59 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2022-11-25 17:49:55,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 625 flow [2022-11-25 17:49:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:49:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:49:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 711 transitions. [2022-11-25 17:49:55,715 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40033783783783783 [2022-11-25 17:49:55,715 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 711 transitions. [2022-11-25 17:49:55,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 711 transitions. [2022-11-25 17:49:55,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:55,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 711 transitions. [2022-11-25 17:49:55,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:55,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:55,721 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:55,721 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 491 flow. Second operand 4 states and 711 transitions. [2022-11-25 17:49:55,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 625 flow [2022-11-25 17:49:55,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 620 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:49:55,729 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 502 flow [2022-11-25 17:49:55,729 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=502, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2022-11-25 17:49:55,730 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 24 predicate places. [2022-11-25 17:49:55,731 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 502 flow [2022-11-25 17:49:55,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:55,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:55,732 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:49:55,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:49:55,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:55,944 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:49:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1521584357, now seen corresponding path program 1 times [2022-11-25 17:49:55,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:49:55,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593387097] [2022-11-25 17:49:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:55,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:49:55,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:49:55,947 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:49:55,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 17:49:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:56,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:49:56,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:49:56,228 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:49:56,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 17:49:56,301 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 17:49:56,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 17:49:56,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:49:56,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:49:56,459 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 17:49:56,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 17:49:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:49:56,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:50:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:50:03,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:50:03,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593387097] [2022-11-25 17:50:03,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593387097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:50:03,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:50:03,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 17:50:03,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189828663] [2022-11-25 17:50:03,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:50:03,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:50:03,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:50:03,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:50:03,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:50:17,301 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 444 [2022-11-25 17:50:17,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 502 flow. Second operand has 8 states, 8 states have (on average 161.75) internal successors, (1294), 8 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:17,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:50:17,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 444 [2022-11-25 17:50:17,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:50:24,072 WARN L233 SmtUtils]: Spent 6.65s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:50:34,855 WARN L233 SmtUtils]: Spent 8.44s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:50:41,657 WARN L233 SmtUtils]: Spent 5.85s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:50:51,940 INFO L130 PetriNetUnfolder]: 8092/12936 cut-off events. [2022-11-25 17:50:51,940 INFO L131 PetriNetUnfolder]: For 2931/2931 co-relation queries the response was YES. [2022-11-25 17:50:51,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33295 conditions, 12936 events. 8092/12936 cut-off events. For 2931/2931 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 94088 event pairs, 4800 based on Foata normal form. 0/10104 useless extension candidates. Maximal degree in co-relation 33268. Up to 4961 conditions per place. [2022-11-25 17:50:52,045 INFO L137 encePairwiseOnDemand]: 435/444 looper letters, 127 selfloop transitions, 48 changer transitions 0/176 dead transitions. [2022-11-25 17:50:52,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 176 transitions, 1473 flow [2022-11-25 17:50:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:50:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:50:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2506 transitions. [2022-11-25 17:50:52,055 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3762762762762763 [2022-11-25 17:50:52,056 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2506 transitions. [2022-11-25 17:50:52,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2506 transitions. [2022-11-25 17:50:52,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:50:52,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2506 transitions. [2022-11-25 17:50:52,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 167.06666666666666) internal successors, (2506), 15 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:52,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 444.0) internal successors, (7104), 16 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:52,077 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 444.0) internal successors, (7104), 16 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:52,078 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 502 flow. Second operand 15 states and 2506 transitions. [2022-11-25 17:50:52,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 176 transitions, 1473 flow [2022-11-25 17:50:52,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 176 transitions, 1440 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:50:52,092 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 927 flow [2022-11-25 17:50:52,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=927, PETRI_PLACES=91, PETRI_TRANSITIONS=98} [2022-11-25 17:50:52,093 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 42 predicate places. [2022-11-25 17:50:52,094 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 927 flow [2022-11-25 17:50:52,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 161.75) internal successors, (1294), 8 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:52,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:50:52,095 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:50:52,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:50:52,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:50:52,308 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:50:52,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:50:52,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1521584356, now seen corresponding path program 1 times [2022-11-25 17:50:52,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:50:52,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011089428] [2022-11-25 17:50:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:50:52,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:50:52,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:50:52,311 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:50:52,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 17:50:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:50:52,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:50:52,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:50:52,617 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 17:50:52,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 17:50:52,688 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 17:50:52,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 17:50:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:50:52,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:50:52,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:50:52,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011089428] [2022-11-25 17:50:52,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011089428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:50:52,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:50:52,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:50:52,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338191941] [2022-11-25 17:50:52,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:50:52,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:50:52,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:50:52,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:50:52,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:50:53,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 444 [2022-11-25 17:50:53,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 98 transitions, 927 flow. Second operand has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:53,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:50:53,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 444 [2022-11-25 17:50:53,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:50:54,787 INFO L130 PetriNetUnfolder]: 5524/9152 cut-off events. [2022-11-25 17:50:54,787 INFO L131 PetriNetUnfolder]: For 4964/4964 co-relation queries the response was YES. [2022-11-25 17:50:54,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24396 conditions, 9152 events. 5524/9152 cut-off events. For 4964/4964 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 65619 event pairs, 3264 based on Foata normal form. 392/8992 useless extension candidates. Maximal degree in co-relation 24363. Up to 9043 conditions per place. [2022-11-25 17:50:54,868 INFO L137 encePairwiseOnDemand]: 440/444 looper letters, 83 selfloop transitions, 12 changer transitions 0/96 dead transitions. [2022-11-25 17:50:54,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 96 transitions, 1109 flow [2022-11-25 17:50:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:50:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:50:54,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 733 transitions. [2022-11-25 17:50:54,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4127252252252252 [2022-11-25 17:50:54,872 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 733 transitions. [2022-11-25 17:50:54,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 733 transitions. [2022-11-25 17:50:54,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:50:54,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 733 transitions. [2022-11-25 17:50:54,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:54,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:54,880 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:54,880 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 927 flow. Second operand 4 states and 733 transitions. [2022-11-25 17:50:54,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 96 transitions, 1109 flow [2022-11-25 17:50:54,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 1091 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 17:50:54,922 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 925 flow [2022-11-25 17:50:54,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=925, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2022-11-25 17:50:54,923 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 41 predicate places. [2022-11-25 17:50:54,923 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 925 flow [2022-11-25 17:50:54,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:54,924 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:50:54,924 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:50:54,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:50:55,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:50:55,135 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:50:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:50:55,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1762112242, now seen corresponding path program 1 times [2022-11-25 17:50:55,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:50:55,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214259575] [2022-11-25 17:50:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:50:55,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:50:55,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:50:55,138 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:50:55,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 17:50:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:50:55,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:50:55,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:50:55,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 17:50:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:50:55,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:50:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:50:56,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:50:56,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214259575] [2022-11-25 17:50:56,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214259575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:50:56,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:50:56,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:50:56,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102078171] [2022-11-25 17:50:56,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:50:56,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:50:56,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:50:56,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:50:56,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:51:01,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 444 [2022-11-25 17:51:01,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 925 flow. Second operand has 10 states, 10 states have (on average 169.6) internal successors, (1696), 10 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:01,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:01,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 444 [2022-11-25 17:51:01,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:04,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:51:07,495 INFO L130 PetriNetUnfolder]: 11396/18216 cut-off events. [2022-11-25 17:51:07,495 INFO L131 PetriNetUnfolder]: For 9198/9294 co-relation queries the response was YES. [2022-11-25 17:51:07,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48607 conditions, 18216 events. 11396/18216 cut-off events. For 9198/9294 co-relation queries the response was YES. Maximal size of possible extension queue 999. Compared 137412 event pairs, 952 based on Foata normal form. 768/17904 useless extension candidates. Maximal degree in co-relation 48573. Up to 5473 conditions per place. [2022-11-25 17:51:07,640 INFO L137 encePairwiseOnDemand]: 435/444 looper letters, 96 selfloop transitions, 54 changer transitions 0/151 dead transitions. [2022-11-25 17:51:07,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 151 transitions, 1421 flow [2022-11-25 17:51:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:51:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:51:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1432 transitions. [2022-11-25 17:51:07,645 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40315315315315314 [2022-11-25 17:51:07,646 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1432 transitions. [2022-11-25 17:51:07,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1432 transitions. [2022-11-25 17:51:07,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:07,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1432 transitions. [2022-11-25 17:51:07,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:07,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 444.0) internal successors, (3996), 9 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:07,656 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 444.0) internal successors, (3996), 9 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:07,656 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 925 flow. Second operand 8 states and 1432 transitions. [2022-11-25 17:51:07,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 151 transitions, 1421 flow [2022-11-25 17:51:07,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 151 transitions, 1408 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:51:07,706 INFO L231 Difference]: Finished difference. Result has 100 places, 103 transitions, 1116 flow [2022-11-25 17:51:07,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1116, PETRI_PLACES=100, PETRI_TRANSITIONS=103} [2022-11-25 17:51:07,707 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 51 predicate places. [2022-11-25 17:51:07,707 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 103 transitions, 1116 flow [2022-11-25 17:51:07,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 169.6) internal successors, (1696), 10 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:07,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:07,708 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:07,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:51:07,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:51:07,920 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:51:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash 432256953, now seen corresponding path program 1 times [2022-11-25 17:51:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:51:07,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913131952] [2022-11-25 17:51:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:07,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:51:07,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:51:07,922 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:51:07,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 17:51:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:08,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:51:08,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:51:08,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:08,321 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 11 treesize of output 9 [2022-11-25 17:51:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:51:08,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:51:08,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913131952] [2022-11-25 17:51:08,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913131952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:51:08,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:51:08,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:51:08,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347188834] [2022-11-25 17:51:08,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:51:08,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:51:08,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:51:08,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:51:08,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:51:10,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 444 [2022-11-25 17:51:10,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 103 transitions, 1116 flow. Second operand has 12 states, 12 states have (on average 172.66666666666666) internal successors, (2072), 12 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:10,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:10,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 444 [2022-11-25 17:51:10,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:15,080 INFO L130 PetriNetUnfolder]: 10724/17432 cut-off events. [2022-11-25 17:51:15,081 INFO L131 PetriNetUnfolder]: For 17424/17520 co-relation queries the response was YES. [2022-11-25 17:51:15,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54079 conditions, 17432 events. 10724/17432 cut-off events. For 17424/17520 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 133228 event pairs, 848 based on Foata normal form. 624/17744 useless extension candidates. Maximal degree in co-relation 54040. Up to 4721 conditions per place. [2022-11-25 17:51:15,227 INFO L137 encePairwiseOnDemand]: 437/444 looper letters, 121 selfloop transitions, 48 changer transitions 0/170 dead transitions. [2022-11-25 17:51:15,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 170 transitions, 1697 flow [2022-11-25 17:51:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:51:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:51:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1816 transitions. [2022-11-25 17:51:15,231 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.409009009009009 [2022-11-25 17:51:15,231 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1816 transitions. [2022-11-25 17:51:15,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1816 transitions. [2022-11-25 17:51:15,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:15,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1816 transitions. [2022-11-25 17:51:15,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 181.6) internal successors, (1816), 10 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:15,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 444.0) internal successors, (4884), 11 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:15,243 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 444.0) internal successors, (4884), 11 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:15,243 INFO L175 Difference]: Start difference. First operand has 100 places, 103 transitions, 1116 flow. Second operand 10 states and 1816 transitions. [2022-11-25 17:51:15,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 170 transitions, 1697 flow [2022-11-25 17:51:15,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 170 transitions, 1598 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-25 17:51:15,553 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 1153 flow [2022-11-25 17:51:15,553 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1153, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2022-11-25 17:51:15,555 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 56 predicate places. [2022-11-25 17:51:15,555 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 1153 flow [2022-11-25 17:51:15,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 172.66666666666666) internal successors, (2072), 12 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:15,556 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:15,556 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:15,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:51:15,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:51:15,769 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:51:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:15,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1282397398, now seen corresponding path program 2 times [2022-11-25 17:51:15,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:51:15,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260715197] [2022-11-25 17:51:15,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:51:15,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:51:15,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:51:15,771 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:51:15,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 17:51:15,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:51:15,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:51:15,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:51:15,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:16,041 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:51:16,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 17:51:16,163 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 17:51:16,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 17:51:16,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:51:16,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:51:16,372 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 17:51:16,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 17:51:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 17:51:16,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:51:16,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:51:16,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260715197] [2022-11-25 17:51:16,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260715197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:16,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:16,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:51:16,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692389616] [2022-11-25 17:51:16,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:16,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:51:16,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:51:16,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:51:16,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:51:17,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 444 [2022-11-25 17:51:17,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 1153 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:17,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:17,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 444 [2022-11-25 17:51:17,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:19,676 INFO L130 PetriNetUnfolder]: 8924/14904 cut-off events. [2022-11-25 17:51:19,676 INFO L131 PetriNetUnfolder]: For 17386/17386 co-relation queries the response was YES. [2022-11-25 17:51:19,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45069 conditions, 14904 events. 8924/14904 cut-off events. For 17386/17386 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 114157 event pairs, 5472 based on Foata normal form. 1096/15888 useless extension candidates. Maximal degree in co-relation 45029. Up to 14795 conditions per place. [2022-11-25 17:51:19,978 INFO L137 encePairwiseOnDemand]: 440/444 looper letters, 89 selfloop transitions, 12 changer transitions 0/102 dead transitions. [2022-11-25 17:51:19,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 1285 flow [2022-11-25 17:51:19,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:51:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:51:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 714 transitions. [2022-11-25 17:51:19,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40202702702702703 [2022-11-25 17:51:19,980 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 714 transitions. [2022-11-25 17:51:19,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 714 transitions. [2022-11-25 17:51:19,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:19,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 714 transitions. [2022-11-25 17:51:19,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:19,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:19,986 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:19,986 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 1153 flow. Second operand 4 states and 714 transitions. [2022-11-25 17:51:19,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 1285 flow [2022-11-25 17:51:20,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 102 transitions, 1180 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-11-25 17:51:20,042 INFO L231 Difference]: Finished difference. Result has 98 places, 102 transitions, 1002 flow [2022-11-25 17:51:20,042 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1002, PETRI_PLACES=98, PETRI_TRANSITIONS=102} [2022-11-25 17:51:20,043 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 49 predicate places. [2022-11-25 17:51:20,043 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 102 transitions, 1002 flow [2022-11-25 17:51:20,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:20,044 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:20,044 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1] [2022-11-25 17:51:20,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:51:20,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:51:20,256 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:51:20,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:20,257 INFO L85 PathProgramCache]: Analyzing trace with hash -5630497, now seen corresponding path program 1 times [2022-11-25 17:51:20,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:51:20,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349274864] [2022-11-25 17:51:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:20,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:51:20,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:51:20,258 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:51:20,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 17:51:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:20,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:51:20,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:20,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 17:51:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:21,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:23,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:51:23,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349274864] [2022-11-25 17:51:23,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349274864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:51:23,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:51:23,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-25 17:51:23,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598028426] [2022-11-25 17:51:23,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:51:23,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:51:23,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:51:23,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:51:23,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:51:40,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 444 [2022-11-25 17:51:40,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 102 transitions, 1002 flow. Second operand has 18 states, 18 states have (on average 171.05555555555554) internal successors, (3079), 18 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:40,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:40,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 444 [2022-11-25 17:51:40,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:46,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:51:48,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:51:50,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:51:52,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:51:54,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:51:56,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:51:58,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:52:12,291 INFO L130 PetriNetUnfolder]: 15602/26032 cut-off events. [2022-11-25 17:52:12,291 INFO L131 PetriNetUnfolder]: For 13494/13494 co-relation queries the response was YES. [2022-11-25 17:52:12,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74194 conditions, 26032 events. 15602/26032 cut-off events. For 13494/13494 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 208541 event pairs, 9576 based on Foata normal form. 32/25630 useless extension candidates. Maximal degree in co-relation 74156. Up to 5545 conditions per place. [2022-11-25 17:52:12,506 INFO L137 encePairwiseOnDemand]: 438/444 looper letters, 442 selfloop transitions, 47 changer transitions 0/490 dead transitions. [2022-11-25 17:52:12,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 490 transitions, 4007 flow [2022-11-25 17:52:12,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 17:52:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 17:52:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3364 transitions. [2022-11-25 17:52:12,512 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4209209209209209 [2022-11-25 17:52:12,512 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3364 transitions. [2022-11-25 17:52:12,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3364 transitions. [2022-11-25 17:52:12,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:12,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3364 transitions. [2022-11-25 17:52:12,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 186.88888888888889) internal successors, (3364), 18 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:12,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 444.0) internal successors, (8436), 19 states have internal predecessors, (8436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:12,529 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 444.0) internal successors, (8436), 19 states have internal predecessors, (8436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:12,530 INFO L175 Difference]: Start difference. First operand has 98 places, 102 transitions, 1002 flow. Second operand 18 states and 3364 transitions. [2022-11-25 17:52:12,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 490 transitions, 4007 flow [2022-11-25 17:52:12,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 490 transitions, 3974 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-11-25 17:52:12,688 INFO L231 Difference]: Finished difference. Result has 122 places, 114 transitions, 1298 flow [2022-11-25 17:52:12,688 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1298, PETRI_PLACES=122, PETRI_TRANSITIONS=114} [2022-11-25 17:52:12,689 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 73 predicate places. [2022-11-25 17:52:12,689 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 114 transitions, 1298 flow [2022-11-25 17:52:12,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 171.05555555555554) internal successors, (3079), 18 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:12,690 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:12,690 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-25 17:52:12,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:12,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:52:12,913 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:52:12,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1694781170, now seen corresponding path program 3 times [2022-11-25 17:52:12,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:52:12,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436821671] [2022-11-25 17:52:12,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:52:12,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:52:12,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:52:12,915 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:52:12,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 17:52:13,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 17:52:13,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:13,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:52:13,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:13,312 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:52:13,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 17:52:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:14,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:18,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:52:18,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436821671] [2022-11-25 17:52:18,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436821671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:18,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:52:18,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-25 17:52:18,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749293432] [2022-11-25 17:52:18,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:18,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:52:18,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:52:18,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:52:18,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:52:49,212 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 444 [2022-11-25 17:52:49,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 114 transitions, 1298 flow. Second operand has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:49,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:49,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 444 [2022-11-25 17:52:49,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:03,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:53:05,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:53:07,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:53:09,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:53:11,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:53:13,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:53:15,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:53:17,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:53:19,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:53:21,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:53:37,790 INFO L130 PetriNetUnfolder]: 15614/26056 cut-off events. [2022-11-25 17:53:37,790 INFO L131 PetriNetUnfolder]: For 13411/13417 co-relation queries the response was YES. [2022-11-25 17:53:37,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74550 conditions, 26056 events. 15614/26056 cut-off events. For 13411/13417 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 210474 event pairs, 9576 based on Foata normal form. 12/25628 useless extension candidates. Maximal degree in co-relation 74503. Up to 5545 conditions per place. [2022-11-25 17:53:38,023 INFO L137 encePairwiseOnDemand]: 438/444 looper letters, 381 selfloop transitions, 70 changer transitions 0/452 dead transitions. [2022-11-25 17:53:38,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 452 transitions, 4001 flow [2022-11-25 17:53:38,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:53:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 17:53:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4370 transitions. [2022-11-25 17:53:38,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4100975975975976 [2022-11-25 17:53:38,034 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4370 transitions. [2022-11-25 17:53:38,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4370 transitions. [2022-11-25 17:53:38,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:38,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4370 transitions. [2022-11-25 17:53:38,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 182.08333333333334) internal successors, (4370), 24 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:38,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 444.0) internal successors, (11100), 25 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:38,050 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 444.0) internal successors, (11100), 25 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:38,051 INFO L175 Difference]: Start difference. First operand has 122 places, 114 transitions, 1298 flow. Second operand 24 states and 4370 transitions. [2022-11-25 17:53:38,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 452 transitions, 4001 flow [2022-11-25 17:53:38,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 452 transitions, 3925 flow, removed 4 selfloop flow, removed 8 redundant places. [2022-11-25 17:53:38,176 INFO L231 Difference]: Finished difference. Result has 150 places, 141 transitions, 1756 flow [2022-11-25 17:53:38,177 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1756, PETRI_PLACES=150, PETRI_TRANSITIONS=141} [2022-11-25 17:53:38,177 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 101 predicate places. [2022-11-25 17:53:38,178 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 141 transitions, 1756 flow [2022-11-25 17:53:38,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:38,178 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:38,179 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:38,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:38,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:53:38,380 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:53:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:38,381 INFO L85 PathProgramCache]: Analyzing trace with hash 294054084, now seen corresponding path program 2 times [2022-11-25 17:53:38,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:53:38,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242297993] [2022-11-25 17:53:38,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:53:38,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:53:38,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:53:38,382 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:53:38,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 17:53:38,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:53:38,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:53:38,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:53:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:38,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 17:53:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:39,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:41,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:53:41,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242297993] [2022-11-25 17:53:41,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242297993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:41,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:53:41,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2022-11-25 17:53:41,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129772146] [2022-11-25 17:53:41,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:41,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:53:41,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:53:41,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:53:41,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:53:58,899 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 444 [2022-11-25 17:53:58,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 141 transitions, 1756 flow. Second operand has 18 states, 18 states have (on average 162.55555555555554) internal successors, (2926), 18 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:58,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:58,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 444 [2022-11-25 17:53:58,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:06,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:09,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:54:15,944 INFO L130 PetriNetUnfolder]: 15444/25674 cut-off events. [2022-11-25 17:54:15,945 INFO L131 PetriNetUnfolder]: For 11129/11138 co-relation queries the response was YES. [2022-11-25 17:54:16,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73619 conditions, 25674 events. 15444/25674 cut-off events. For 11129/11138 co-relation queries the response was YES. Maximal size of possible extension queue 1108. Compared 207161 event pairs, 1190 based on Foata normal form. 90/25308 useless extension candidates. Maximal degree in co-relation 73558. Up to 9026 conditions per place. [2022-11-25 17:54:16,271 INFO L137 encePairwiseOnDemand]: 433/444 looper letters, 163 selfloop transitions, 104 changer transitions 0/268 dead transitions. [2022-11-25 17:54:16,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 268 transitions, 2698 flow [2022-11-25 17:54:16,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 17:54:16,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 17:54:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3394 transitions. [2022-11-25 17:54:16,277 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3822072072072072 [2022-11-25 17:54:16,277 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3394 transitions. [2022-11-25 17:54:16,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3394 transitions. [2022-11-25 17:54:16,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:16,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3394 transitions. [2022-11-25 17:54:16,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 169.7) internal successors, (3394), 20 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:16,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 444.0) internal successors, (9324), 21 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:16,287 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 444.0) internal successors, (9324), 21 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:16,287 INFO L175 Difference]: Start difference. First operand has 150 places, 141 transitions, 1756 flow. Second operand 20 states and 3394 transitions. [2022-11-25 17:54:16,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 268 transitions, 2698 flow [2022-11-25 17:54:16,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 268 transitions, 2564 flow, removed 28 selfloop flow, removed 10 redundant places. [2022-11-25 17:54:16,428 INFO L231 Difference]: Finished difference. Result has 161 places, 155 transitions, 1941 flow [2022-11-25 17:54:16,428 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1941, PETRI_PLACES=161, PETRI_TRANSITIONS=155} [2022-11-25 17:54:16,429 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 112 predicate places. [2022-11-25 17:54:16,429 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 155 transitions, 1941 flow [2022-11-25 17:54:16,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 162.55555555555554) internal successors, (2926), 18 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:16,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:16,430 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:16,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:16,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:54:16,644 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:54:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash -19606120, now seen corresponding path program 1 times [2022-11-25 17:54:16,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:54:16,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889917557] [2022-11-25 17:54:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:16,645 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 [2022-11-25 17:54:16,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:54:16,646 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:54:16,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 17:54:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:16,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:54:16,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:54:16,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:54:16,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:54:16,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889917557] [2022-11-25 17:54:16,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889917557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:54:16,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:54:16,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:54:16,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935345087] [2022-11-25 17:54:16,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:54:16,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:54:16,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:54:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:54:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:54:16,893 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 444 [2022-11-25 17:54:16,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 155 transitions, 1941 flow. Second operand has 4 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:16,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:16,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 444 [2022-11-25 17:54:16,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:23,660 INFO L130 PetriNetUnfolder]: 17702/30922 cut-off events. [2022-11-25 17:54:23,661 INFO L131 PetriNetUnfolder]: For 27109/27109 co-relation queries the response was YES. [2022-11-25 17:54:23,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98958 conditions, 30922 events. 17702/30922 cut-off events. For 27109/27109 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 254640 event pairs, 4952 based on Foata normal form. 2524/33446 useless extension candidates. Maximal degree in co-relation 98894. Up to 14249 conditions per place. [2022-11-25 17:54:24,047 INFO L137 encePairwiseOnDemand]: 437/444 looper letters, 140 selfloop transitions, 58 changer transitions 0/198 dead transitions. [2022-11-25 17:54:24,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 198 transitions, 2630 flow [2022-11-25 17:54:24,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:54:24,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:54:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 946 transitions. [2022-11-25 17:54:24,049 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4261261261261261 [2022-11-25 17:54:24,049 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 946 transitions. [2022-11-25 17:54:24,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 946 transitions. [2022-11-25 17:54:24,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:24,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 946 transitions. [2022-11-25 17:54:24,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.2) internal successors, (946), 5 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:24,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:24,052 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:24,052 INFO L175 Difference]: Start difference. First operand has 161 places, 155 transitions, 1941 flow. Second operand 5 states and 946 transitions. [2022-11-25 17:54:24,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 198 transitions, 2630 flow [2022-11-25 17:54:24,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 198 transitions, 2382 flow, removed 21 selfloop flow, removed 11 redundant places. [2022-11-25 17:54:24,464 INFO L231 Difference]: Finished difference. Result has 157 places, 185 transitions, 2160 flow [2022-11-25 17:54:24,464 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2160, PETRI_PLACES=157, PETRI_TRANSITIONS=185} [2022-11-25 17:54:24,464 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 108 predicate places. [2022-11-25 17:54:24,464 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 185 transitions, 2160 flow [2022-11-25 17:54:24,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:24,465 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:24,465 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:24,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:24,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:54:24,678 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:54:24,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:24,678 INFO L85 PathProgramCache]: Analyzing trace with hash -669662258, now seen corresponding path program 2 times [2022-11-25 17:54:24,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:54:24,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805818982] [2022-11-25 17:54:24,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:54:24,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:54:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:54:24,679 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:54:24,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:54:24,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:54:24,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:24,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:54:24,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:54:24,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:54:24,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:54:24,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805818982] [2022-11-25 17:54:24,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805818982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:54:24,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:54:24,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:54:24,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135272250] [2022-11-25 17:54:24,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:54:24,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:54:24,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:54:24,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:54:24,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:54:24,852 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 444 [2022-11-25 17:54:24,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 185 transitions, 2160 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:24,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:24,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 444 [2022-11-25 17:54:24,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:33,724 INFO L130 PetriNetUnfolder]: 23128/40144 cut-off events. [2022-11-25 17:54:33,724 INFO L131 PetriNetUnfolder]: For 96568/98266 co-relation queries the response was YES. [2022-11-25 17:54:34,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169183 conditions, 40144 events. 23128/40144 cut-off events. For 96568/98266 co-relation queries the response was YES. Maximal size of possible extension queue 1348. Compared 344399 event pairs, 8780 based on Foata normal form. 878/40618 useless extension candidates. Maximal degree in co-relation 169121. Up to 20256 conditions per place. [2022-11-25 17:54:34,268 INFO L137 encePairwiseOnDemand]: 441/444 looper letters, 244 selfloop transitions, 4 changer transitions 2/252 dead transitions. [2022-11-25 17:54:34,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 252 transitions, 3372 flow [2022-11-25 17:54:34,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:54:34,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:54:34,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2022-11-25 17:54:34,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4451951951951952 [2022-11-25 17:54:34,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2022-11-25 17:54:34,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2022-11-25 17:54:34,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:34,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2022-11-25 17:54:34,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:34,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:34,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:34,272 INFO L175 Difference]: Start difference. First operand has 157 places, 185 transitions, 2160 flow. Second operand 3 states and 593 transitions. [2022-11-25 17:54:34,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 252 transitions, 3372 flow [2022-11-25 17:54:35,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 252 transitions, 3364 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-25 17:54:35,536 INFO L231 Difference]: Finished difference. Result has 160 places, 187 transitions, 2185 flow [2022-11-25 17:54:35,536 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2185, PETRI_PLACES=160, PETRI_TRANSITIONS=187} [2022-11-25 17:54:35,536 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 111 predicate places. [2022-11-25 17:54:35,537 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 187 transitions, 2185 flow [2022-11-25 17:54:35,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:35,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:35,537 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2022-11-25 17:54:35,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:35,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:54:35,740 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:54:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:35,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1277528044, now seen corresponding path program 3 times [2022-11-25 17:54:35,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:54:35,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496701132] [2022-11-25 17:54:35,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:54:35,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:54:35,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:54:35,742 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:54:35,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:54:35,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:54:35,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:36,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:54:36,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:36,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:54:36,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-25 17:54:36,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2022-11-25 17:54:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 17:54:36,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:54:36,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:54:36,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496701132] [2022-11-25 17:54:36,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496701132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:54:36,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:54:36,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:54:36,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591235896] [2022-11-25 17:54:36,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:54:36,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:54:36,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:54:36,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:54:36,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:54:38,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 444 [2022-11-25 17:54:38,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 187 transitions, 2185 flow. Second operand has 6 states, 6 states have (on average 169.66666666666666) internal successors, (1018), 6 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:38,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:38,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 444 [2022-11-25 17:54:38,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:48,512 INFO L130 PetriNetUnfolder]: 23141/40316 cut-off events. [2022-11-25 17:54:48,512 INFO L131 PetriNetUnfolder]: For 114519/115692 co-relation queries the response was YES. [2022-11-25 17:54:48,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179228 conditions, 40316 events. 23141/40316 cut-off events. For 114519/115692 co-relation queries the response was YES. Maximal size of possible extension queue 1369. Compared 344046 event pairs, 1817 based on Foata normal form. 1362/41420 useless extension candidates. Maximal degree in co-relation 179163. Up to 33872 conditions per place. [2022-11-25 17:54:49,089 INFO L137 encePairwiseOnDemand]: 437/444 looper letters, 147 selfloop transitions, 60 changer transitions 0/209 dead transitions. [2022-11-25 17:54:49,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 209 transitions, 2738 flow [2022-11-25 17:54:49,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:54:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:54:49,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1053 transitions. [2022-11-25 17:54:49,093 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3952702702702703 [2022-11-25 17:54:49,094 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1053 transitions. [2022-11-25 17:54:49,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1053 transitions. [2022-11-25 17:54:49,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:49,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1053 transitions. [2022-11-25 17:54:49,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 175.5) internal successors, (1053), 6 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:49,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 444.0) internal successors, (3108), 7 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:49,101 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 444.0) internal successors, (3108), 7 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:49,101 INFO L175 Difference]: Start difference. First operand has 160 places, 187 transitions, 2185 flow. Second operand 6 states and 1053 transitions. [2022-11-25 17:54:49,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 209 transitions, 2738 flow [2022-11-25 17:54:50,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 209 transitions, 2731 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:54:50,591 INFO L231 Difference]: Finished difference. Result has 167 places, 195 transitions, 2411 flow [2022-11-25 17:54:50,591 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2411, PETRI_PLACES=167, PETRI_TRANSITIONS=195} [2022-11-25 17:54:50,592 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 118 predicate places. [2022-11-25 17:54:50,592 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 195 transitions, 2411 flow [2022-11-25 17:54:50,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.66666666666666) internal successors, (1018), 6 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:50,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:50,592 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:50,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:54:50,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:54:50,793 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 17:54:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:50,793 INFO L85 PathProgramCache]: Analyzing trace with hash -811140752, now seen corresponding path program 1 times [2022-11-25 17:54:50,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:54:50,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947153396] [2022-11-25 17:54:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:50,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:54:50,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:54:50,795 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:54:50,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6faa15db-0b62-45f4-96b3-3a70b4f787b3/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:54:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:50,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:54:50,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:50,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 17:54:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:54:51,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:54:54,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:54:54,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947153396] [2022-11-25 17:54:54,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947153396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:54,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:54:54,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-25 17:54:54,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183258670] [2022-11-25 17:54:54,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:54,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:54:54,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:54:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:54:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:55:05,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 444 [2022-11-25 17:55:05,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 195 transitions, 2411 flow. Second operand has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:05,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:05,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 444 [2022-11-25 17:55:05,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:16,660 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] [2022-11-25 17:55:18,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:22,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:55:25,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:27,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:28,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:30,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:32,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:34,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:39,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:55:42,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:55:44,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:55:48,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:55:50,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:55:52,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:55:54,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:55:58,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []