./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:45:38,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:45:38,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:45:38,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:45:38,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:45:38,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:45:38,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:45:38,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:45:38,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:45:38,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:45:38,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:45:38,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:45:38,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:45:38,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:45:38,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:45:38,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:45:38,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:45:38,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:45:38,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:45:38,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:45:38,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:45:38,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:45:38,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:45:38,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:45:38,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:45:38,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:45:38,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:45:38,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:45:38,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:45:38,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:45:38,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:45:38,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:45:38,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:45:38,490 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:45:38,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:45:38,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:45:38,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:45:38,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:45:38,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:45:38,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:45:38,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:45:38,493 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 18:45:38,512 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:45:38,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:45:38,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:45:38,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:45:38,513 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:45:38,514 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:45:38,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:45:38,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:45:38,514 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:45:38,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:45:38,515 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:45:38,515 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:45:38,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:45:38,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:45:38,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:45:38,515 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:45:38,516 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:45:38,516 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:45:38,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:45:38,516 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:45:38,516 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:45:38,516 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:45:38,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:45:38,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:45:38,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:45:38,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:45:38,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:45:38,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:45:38,518 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:45:38,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:45:38,518 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:45:38,518 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:45:38,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:45:38,518 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:45:38,519 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_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc [2022-12-13 18:45:38,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:45:38,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:45:38,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:45:38,701 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:45:38,702 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:45:38,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2022-12-13 18:45:41,264 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:45:41,422 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:45:41,422 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2022-12-13 18:45:41,427 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/data/33491ec2d/ff3f5f2934514f41b8bf2adc298090bf/FLAGd2d275ef7 [2022-12-13 18:45:41,438 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/data/33491ec2d/ff3f5f2934514f41b8bf2adc298090bf [2022-12-13 18:45:41,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:45:41,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:45:41,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:45:41,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:45:41,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:45:41,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:45:41" (1/1) ... [2022-12-13 18:45:41,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6545a14c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:41, skipping insertion in model container [2022-12-13 18:45:41,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:45:41" (1/1) ... [2022-12-13 18:45:41,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:45:41,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:45:41,608 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:41,609 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:41,609 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:41,612 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:41,613 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:41,613 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:41,617 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:41,618 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:41,618 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:41,620 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:41,620 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:41,621 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:41,622 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:41,623 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:41,623 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:41,625 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:41,625 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:41,626 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:41,627 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:41,628 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:41,628 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:41,630 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:41,630 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:41,631 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:41,640 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_1d235319-9aee-4e9c-8ffe-d631d566bd93/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2022-12-13 18:45:41,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:45:41,657 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-13 18:45:41,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@86f5503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:41, skipping insertion in model container [2022-12-13 18:45:41,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:45:41,658 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 18:45:41,660 INFO L158 Benchmark]: Toolchain (without parser) took 218.57ms. Allocated memory is still 134.2MB. Free memory was 99.9MB in the beginning and 88.2MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 18:45:41,660 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 134.2MB. Free memory is still 103.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 18:45:41,661 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.94ms. Allocated memory is still 134.2MB. Free memory was 99.6MB in the beginning and 88.2MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 18:45:41,662 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 134.2MB. Free memory is still 103.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 216.94ms. Allocated memory is still 134.2MB. Free memory was 99.6MB in the beginning and 88.2MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 160]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:45:42,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:45:42,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:45:42,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:45:42,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:45:42,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:45:42,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:45:42,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:45:42,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:45:42,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:45:42,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:45:42,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:45:42,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:45:42,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:45:42,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:45:42,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:45:42,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:45:42,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:45:42,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:45:42,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:45:42,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:45:42,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:45:42,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:45:42,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:45:42,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:45:42,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:45:42,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:45:42,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:45:42,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:45:42,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:45:42,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:45:42,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:45:42,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:45:42,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:45:42,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:45:42,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:45:42,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:45:42,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:45:42,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:45:42,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:45:42,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:45:42,994 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 18:45:43,017 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:45:43,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:45:43,017 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:45:43,017 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:45:43,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:45:43,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:45:43,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:45:43,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:45:43,019 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:45:43,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:45:43,019 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:45:43,020 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:45:43,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:45:43,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:45:43,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:45:43,020 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:45:43,020 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:45:43,020 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:45:43,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:45:43,021 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:45:43,021 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 18:45:43,021 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 18:45:43,021 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:45:43,021 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:45:43,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:45:43,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:45:43,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:45:43,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:45:43,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:45:43,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:45:43,022 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 18:45:43,022 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 18:45:43,022 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:45:43,022 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:45:43,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:45:43,022 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 18:45:43,022 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:45:43,023 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_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc [2022-12-13 18:45:43,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:45:43,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:45:43,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:45:43,288 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:45:43,289 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:45:43,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2022-12-13 18:45:45,844 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:45:45,988 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:45:45,989 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2022-12-13 18:45:45,995 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/data/137c389e9/9fb9b71a05f646d18a32c54210d34d77/FLAGef01b4dff [2022-12-13 18:45:46,009 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/data/137c389e9/9fb9b71a05f646d18a32c54210d34d77 [2022-12-13 18:45:46,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:45:46,013 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:45:46,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:45:46,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:45:46,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:45:46,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:45:46" (1/1) ... [2022-12-13 18:45:46,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e3a2d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:46, skipping insertion in model container [2022-12-13 18:45:46,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:45:46" (1/1) ... [2022-12-13 18:45:46,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:45:46,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:45:46,169 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,170 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,170 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,173 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,173 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,173 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,176 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,176 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,176 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,179 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,179 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,180 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,180 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,181 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,181 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,182 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,182 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,183 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,184 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,185 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,185 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,186 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,186 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,187 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,193 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_1d235319-9aee-4e9c-8ffe-d631d566bd93/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2022-12-13 18:45:46,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:45:46,210 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 18:45:46,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:45:46,216 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,217 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,217 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,218 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,218 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,219 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,219 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,220 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,220 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,221 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,221 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,222 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,222 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,223 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,223 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,224 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,224 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,225 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,225 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,226 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,226 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,227 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,227 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,228 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,231 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_1d235319-9aee-4e9c-8ffe-d631d566bd93/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2022-12-13 18:45:46,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:45:46,238 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:45:46,247 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,248 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,248 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,249 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,249 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,250 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,250 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,250 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,251 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,252 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,252 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,252 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,253 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,253 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,254 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,254 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,255 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,255 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,255 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,256 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,256 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,257 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,257 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:46,257 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:46,261 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_1d235319-9aee-4e9c-8ffe-d631d566bd93/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2022-12-13 18:45:46,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:45:46,276 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:45:46,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:46 WrapperNode [2022-12-13 18:45:46,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:45:46,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:45:46,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:45:46,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:45:46,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:46" (1/1) ... [2022-12-13 18:45:46,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:46" (1/1) ... [2022-12-13 18:45:46,313 INFO L138 Inliner]: procedures = 29, calls = 83, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 336 [2022-12-13 18:45:46,314 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:45:46,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:45:46,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:45:46,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:45:46,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:46" (1/1) ... [2022-12-13 18:45:46,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:46" (1/1) ... [2022-12-13 18:45:46,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:46" (1/1) ... [2022-12-13 18:45:46,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:46" (1/1) ... [2022-12-13 18:45:46,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:46" (1/1) ... [2022-12-13 18:45:46,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:46" (1/1) ... [2022-12-13 18:45:46,338 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:46" (1/1) ... [2022-12-13 18:45:46,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:46" (1/1) ... [2022-12-13 18:45:46,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:45:46,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:45:46,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:45:46,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:45:46,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:46" (1/1) ... [2022-12-13 18:45:46,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:45:46,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:45:46,367 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:45:46,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:45:46,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:45:46,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 18:45:46,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:45:46,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 18:45:46,397 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 18:45:46,397 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 18:45:46,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 18:45:46,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 18:45:46,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 18:45:46,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 18:45:46,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 18:45:46,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 18:45:46,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 18:45:46,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 18:45:46,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 18:45:46,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:45:46,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:45:46,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:45:46,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 18:45:46,400 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 18:45:46,495 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:45:46,497 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:45:47,169 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:45:47,315 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:45:47,315 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-12-13 18:45:47,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:45:47 BoogieIcfgContainer [2022-12-13 18:45:47,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:45:47,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:45:47,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:45:47,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:45:47,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:45:46" (1/3) ... [2022-12-13 18:45:47,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8475f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:45:47, skipping insertion in model container [2022-12-13 18:45:47,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:46" (2/3) ... [2022-12-13 18:45:47,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8475f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:45:47, skipping insertion in model container [2022-12-13 18:45:47,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:45:47" (3/3) ... [2022-12-13 18:45:47,323 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2022-12-13 18:45:47,337 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:45:47,337 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-12-13 18:45:47,337 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:45:47,405 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 18:45:47,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 288 places, 297 transitions, 626 flow [2022-12-13 18:45:47,498 INFO L130 PetriNetUnfolder]: 22/293 cut-off events. [2022-12-13 18:45:47,499 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 18:45:47,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 293 events. 22/293 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 277 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 241. Up to 2 conditions per place. [2022-12-13 18:45:47,503 INFO L82 GeneralOperation]: Start removeDead. Operand has 288 places, 297 transitions, 626 flow [2022-12-13 18:45:47,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 279 places, 288 transitions, 600 flow [2022-12-13 18:45:47,515 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:45:47,522 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 279 places, 288 transitions, 600 flow [2022-12-13 18:45:47,524 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 279 places, 288 transitions, 600 flow [2022-12-13 18:45:47,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 279 places, 288 transitions, 600 flow [2022-12-13 18:45:47,562 INFO L130 PetriNetUnfolder]: 22/288 cut-off events. [2022-12-13 18:45:47,562 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 18:45:47,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 288 events. 22/288 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 279 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 241. Up to 2 conditions per place. [2022-12-13 18:45:47,565 INFO L119 LiptonReduction]: Number of co-enabled transitions 3860 [2022-12-13 18:46:17,032 WARN L233 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 129 DAG size of output: 128 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 18:46:24,292 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 135 DAG size of output: 134 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 18:46:27,575 INFO L134 LiptonReduction]: Checked pairs total: 6412 [2022-12-13 18:46:27,575 INFO L136 LiptonReduction]: Total number of compositions: 301 [2022-12-13 18:46:27,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:46:27,592 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;@73c9e08d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:46:27,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2022-12-13 18:46:27,594 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 18:46:27,594 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:46:27,594 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:46:27,595 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:46:27,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:46:27,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:46:27,599 INFO L85 PathProgramCache]: Analyzing trace with hash 46393, now seen corresponding path program 1 times [2022-12-13 18:46:27,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:46:27,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142105276] [2022-12-13 18:46:27,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:46:27,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:46:27,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:46:27,610 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:46:27,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 18:46:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:46:27,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:46:27,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:46:27,930 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 18:46:27,931 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 18:46:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:46:27,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:46:27,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:46:27,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142105276] [2022-12-13 18:46:27,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142105276] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:46:27,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:46:27,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:46:27,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054208052] [2022-12-13 18:46:27,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:46:27,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:46:27,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:46:28,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:46:28,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:46:28,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 598 [2022-12-13 18:46:28,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:28,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:46:28,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 598 [2022-12-13 18:46:28,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:46:37,043 INFO L130 PetriNetUnfolder]: 61986/76440 cut-off events. [2022-12-13 18:46:37,043 INFO L131 PetriNetUnfolder]: For 428/428 co-relation queries the response was YES. [2022-12-13 18:46:37,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153328 conditions, 76440 events. 61986/76440 cut-off events. For 428/428 co-relation queries the response was YES. Maximal size of possible extension queue 5470. Compared 418127 event pairs, 39412 based on Foata normal form. 0/17067 useless extension candidates. Maximal degree in co-relation 69796. Up to 37634 conditions per place. [2022-12-13 18:46:37,499 INFO L137 encePairwiseOnDemand]: 586/598 looper letters, 120 selfloop transitions, 6 changer transitions 0/132 dead transitions. [2022-12-13 18:46:37,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 132 transitions, 564 flow [2022-12-13 18:46:37,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:46:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:46:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 852 transitions. [2022-12-13 18:46:37,512 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47491638795986624 [2022-12-13 18:46:37,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 852 transitions. [2022-12-13 18:46:37,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 852 transitions. [2022-12-13 18:46:37,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:46:37,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 852 transitions. [2022-12-13 18:46:37,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:37,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:37,528 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:37,529 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 172 flow. Second operand 3 states and 852 transitions. [2022-12-13 18:46:37,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 132 transitions, 564 flow [2022-12-13 18:46:37,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 132 transitions, 532 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 18:46:37,670 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 200 flow [2022-12-13 18:46:37,671 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2022-12-13 18:46:37,674 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, -7 predicate places. [2022-12-13 18:46:37,674 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 200 flow [2022-12-13 18:46:37,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:37,674 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:46:37,674 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:46:37,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:46:37,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:46:37,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:46:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:46:37,879 INFO L85 PathProgramCache]: Analyzing trace with hash 46392, now seen corresponding path program 1 times [2022-12-13 18:46:37,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:46:37,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977113427] [2022-12-13 18:46:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:46:37,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:46:37,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:46:37,886 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:46:37,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 18:46:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:46:37,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:46:37,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:46:38,122 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 18:46:38,123 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 18:46:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:46:38,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:46:38,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:46:38,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977113427] [2022-12-13 18:46:38,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977113427] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:46:38,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:46:38,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:46:38,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192347707] [2022-12-13 18:46:38,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:46:38,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:46:38,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:46:38,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:46:38,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:46:38,291 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 598 [2022-12-13 18:46:38,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:38,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:46:38,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 598 [2022-12-13 18:46:38,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:46:45,965 INFO L130 PetriNetUnfolder]: 61979/76420 cut-off events. [2022-12-13 18:46:45,965 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:46:46,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152304 conditions, 76420 events. 61979/76420 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5470. Compared 418932 event pairs, 39412 based on Foata normal form. 4/16181 useless extension candidates. Maximal degree in co-relation 76132. Up to 75256 conditions per place. [2022-12-13 18:46:46,352 INFO L137 encePairwiseOnDemand]: 594/598 looper letters, 66 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2022-12-13 18:46:46,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 328 flow [2022-12-13 18:46:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:46:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:46:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2022-12-13 18:46:46,355 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2022-12-13 18:46:46,355 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2022-12-13 18:46:46,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2022-12-13 18:46:46,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:46:46,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2022-12-13 18:46:46,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:46,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:46,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:46,360 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 200 flow. Second operand 3 states and 782 transitions. [2022-12-13 18:46:46,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 328 flow [2022-12-13 18:46:46,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:46:46,362 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 184 flow [2022-12-13 18:46:46,362 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2022-12-13 18:46:46,363 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, -10 predicate places. [2022-12-13 18:46:46,363 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 184 flow [2022-12-13 18:46:46,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:46,364 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:46:46,364 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 18:46:46,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 18:46:46,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:46:46,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:46:46,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:46:46,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1443067, now seen corresponding path program 1 times [2022-12-13 18:46:46,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:46:46,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252687385] [2022-12-13 18:46:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:46:46,571 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:46:46,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:46:46,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:46:46,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 18:46:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:46:46,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:46:46,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:46:46,841 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 18:46:46,841 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 18:46:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:46:46,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:46:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:46:47,088 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:46:47,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252687385] [2022-12-13 18:46:47,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252687385] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:46:47,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:46:47,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 18:46:47,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268248523] [2022-12-13 18:46:47,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:46:47,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:46:47,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:46:47,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:46:47,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:46:48,294 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 598 [2022-12-13 18:46:48,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:48,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:46:48,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 598 [2022-12-13 18:46:48,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:47:01,657 INFO L130 PetriNetUnfolder]: 92992/114672 cut-off events. [2022-12-13 18:47:01,657 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:47:01,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228510 conditions, 114672 events. 92992/114672 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7188. Compared 645080 event pairs, 59118 based on Foata normal form. 0/26059 useless extension candidates. Maximal degree in co-relation 228502. Up to 37632 conditions per place. [2022-12-13 18:47:02,157 INFO L137 encePairwiseOnDemand]: 586/598 looper letters, 167 selfloop transitions, 27 changer transitions 0/200 dead transitions. [2022-12-13 18:47:02,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 200 transitions, 872 flow [2022-12-13 18:47:02,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:47:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:47:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1547 transitions. [2022-12-13 18:47:02,161 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4311594202898551 [2022-12-13 18:47:02,161 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1547 transitions. [2022-12-13 18:47:02,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1547 transitions. [2022-12-13 18:47:02,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:02,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1547 transitions. [2022-12-13 18:47:02,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 257.8333333333333) internal successors, (1547), 6 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:02,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 598.0) internal successors, (4186), 7 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:02,169 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 598.0) internal successors, (4186), 7 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:02,169 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 184 flow. Second operand 6 states and 1547 transitions. [2022-12-13 18:47:02,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 200 transitions, 872 flow [2022-12-13 18:47:02,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 200 transitions, 871 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:47:02,172 INFO L231 Difference]: Finished difference. Result has 78 places, 94 transitions, 387 flow [2022-12-13 18:47:02,173 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=78, PETRI_TRANSITIONS=94} [2022-12-13 18:47:02,173 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, -2 predicate places. [2022-12-13 18:47:02,173 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 94 transitions, 387 flow [2022-12-13 18:47:02,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:02,174 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:02,174 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:47:02,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 18:47:02,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:02,376 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:47:02,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:02,377 INFO L85 PathProgramCache]: Analyzing trace with hash 44785887, now seen corresponding path program 1 times [2022-12-13 18:47:02,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:02,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776060352] [2022-12-13 18:47:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:47:02,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:02,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:02,383 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:02,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 18:47:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:47:02,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 18:47:02,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:02,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:02,613 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-12-13 18:47:02,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-12-13 18:47:02,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:02,930 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 18:47:02,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 18:47:03,192 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-12-13 18:47:03,193 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 3 case distinctions, treesize of input 51 treesize of output 76 [2022-12-13 18:47:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:47:03,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:47:03,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:47:03,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776060352] [2022-12-13 18:47:03,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776060352] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:47:03,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:47:03,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:47:03,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623069634] [2022-12-13 18:47:03,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:47:03,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:47:03,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:47:03,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:47:03,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:47:04,213 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 598 [2022-12-13 18:47:04,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 94 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:04,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:47:04,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 598 [2022-12-13 18:47:04,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:47:13,384 INFO L130 PetriNetUnfolder]: 74496/92484 cut-off events. [2022-12-13 18:47:13,385 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-13 18:47:13,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184236 conditions, 92484 events. 74496/92484 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5988. Compared 524907 event pairs, 46938 based on Foata normal form. 0/21443 useless extension candidates. Maximal degree in co-relation 184223. Up to 90738 conditions per place. [2022-12-13 18:47:13,820 INFO L137 encePairwiseOnDemand]: 595/598 looper letters, 83 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2022-12-13 18:47:13,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 90 transitions, 535 flow [2022-12-13 18:47:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:47:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:47:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2022-12-13 18:47:13,822 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4459308807134894 [2022-12-13 18:47:13,822 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2022-12-13 18:47:13,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2022-12-13 18:47:13,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:13,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2022-12-13 18:47:13,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:13,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:13,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:13,828 INFO L175 Difference]: Start difference. First operand has 78 places, 94 transitions, 387 flow. Second operand 3 states and 800 transitions. [2022-12-13 18:47:13,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 90 transitions, 535 flow [2022-12-13 18:47:13,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 90 transitions, 505 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 18:47:13,831 INFO L231 Difference]: Finished difference. Result has 77 places, 90 transitions, 339 flow [2022-12-13 18:47:13,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=77, PETRI_TRANSITIONS=90} [2022-12-13 18:47:13,832 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, -3 predicate places. [2022-12-13 18:47:13,832 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 90 transitions, 339 flow [2022-12-13 18:47:13,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:13,833 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:13,833 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:47:13,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 18:47:14,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:14,034 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:47:14,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:14,035 INFO L85 PathProgramCache]: Analyzing trace with hash 44785888, now seen corresponding path program 1 times [2022-12-13 18:47:14,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:14,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917803993] [2022-12-13 18:47:14,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:47:14,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:14,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:14,040 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:14,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 18:47:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:47:14,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 18:47:14,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:14,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:14,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:14,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:14,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:14,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:14,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:14,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:14,411 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-13 18:47:14,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2022-12-13 18:47:14,452 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-12-13 18:47:14,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-12-13 18:47:14,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:14,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:47:14,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:14,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:47:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:47:14,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:47:14,548 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:47:14,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917803993] [2022-12-13 18:47:14,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917803993] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:47:14,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:47:14,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:47:14,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071234457] [2022-12-13 18:47:14,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:47:14,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:47:14,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:47:14,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:47:14,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:47:14,931 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 598 [2022-12-13 18:47:14,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 90 transitions, 339 flow. Second operand has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:14,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:47:14,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 598 [2022-12-13 18:47:14,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:47:21,935 INFO L130 PetriNetUnfolder]: 56014/70324 cut-off events. [2022-12-13 18:47:21,936 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 18:47:22,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139890 conditions, 70324 events. 56014/70324 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4232. Compared 400368 event pairs, 34758 based on Foata normal form. 0/18608 useless extension candidates. Maximal degree in co-relation 139876. Up to 68578 conditions per place. [2022-12-13 18:47:22,254 INFO L137 encePairwiseOnDemand]: 595/598 looper letters, 79 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2022-12-13 18:47:22,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 86 transitions, 479 flow [2022-12-13 18:47:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:47:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:47:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 801 transitions. [2022-12-13 18:47:22,256 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44648829431438125 [2022-12-13 18:47:22,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 801 transitions. [2022-12-13 18:47:22,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 801 transitions. [2022-12-13 18:47:22,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:22,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 801 transitions. [2022-12-13 18:47:22,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:22,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:22,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:22,261 INFO L175 Difference]: Start difference. First operand has 77 places, 90 transitions, 339 flow. Second operand 3 states and 801 transitions. [2022-12-13 18:47:22,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 86 transitions, 479 flow [2022-12-13 18:47:22,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 86 transitions, 478 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:47:22,263 INFO L231 Difference]: Finished difference. Result has 76 places, 86 transitions, 320 flow [2022-12-13 18:47:22,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=76, PETRI_TRANSITIONS=86} [2022-12-13 18:47:22,263 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, -4 predicate places. [2022-12-13 18:47:22,264 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 86 transitions, 320 flow [2022-12-13 18:47:22,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:22,264 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:22,264 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:47:22,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 18:47:22,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:22,465 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:47:22,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:22,466 INFO L85 PathProgramCache]: Analyzing trace with hash 89599579, now seen corresponding path program 1 times [2022-12-13 18:47:22,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:22,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543302176] [2022-12-13 18:47:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:47:22,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:22,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:22,472 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:22,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 18:47:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:47:22,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 18:47:22,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:22,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:22,776 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-12-13 18:47:22,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-12-13 18:47:23,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:23,385 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-12-13 18:47:23,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 52 [2022-12-13 18:47:24,109 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2022-12-13 18:47:24,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 174 [2022-12-13 18:47:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:47:32,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:47:32,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:47:32,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543302176] [2022-12-13 18:47:32,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543302176] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:47:32,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:47:32,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:47:32,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935326634] [2022-12-13 18:47:32,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:47:32,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:47:32,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:47:32,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:47:32,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:47:33,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 598 [2022-12-13 18:47:33,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 86 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 247.5) internal successors, (990), 4 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:33,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:47:33,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 598 [2022-12-13 18:47:33,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:47:41,866 INFO L130 PetriNetUnfolder]: 54241/68005 cut-off events. [2022-12-13 18:47:41,866 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 18:47:41,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135253 conditions, 68005 events. 54241/68005 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4098. Compared 384351 event pairs, 33453 based on Foata normal form. 0/18242 useless extension candidates. Maximal degree in co-relation 135238. Up to 66259 conditions per place. [2022-12-13 18:47:42,165 INFO L137 encePairwiseOnDemand]: 595/598 looper letters, 77 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2022-12-13 18:47:42,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 84 transitions, 472 flow [2022-12-13 18:47:42,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:47:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:47:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2022-12-13 18:47:42,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.443701226309922 [2022-12-13 18:47:42,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2022-12-13 18:47:42,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2022-12-13 18:47:42,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:42,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2022-12-13 18:47:42,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:42,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:42,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:42,170 INFO L175 Difference]: Start difference. First operand has 76 places, 86 transitions, 320 flow. Second operand 3 states and 796 transitions. [2022-12-13 18:47:42,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 84 transitions, 472 flow [2022-12-13 18:47:42,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 471 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:47:42,172 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 317 flow [2022-12-13 18:47:42,172 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2022-12-13 18:47:42,172 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, -5 predicate places. [2022-12-13 18:47:42,172 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 317 flow [2022-12-13 18:47:42,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 247.5) internal successors, (990), 4 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:42,173 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:42,173 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:47:42,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 18:47:42,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:42,374 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:47:42,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:42,375 INFO L85 PathProgramCache]: Analyzing trace with hash 89599580, now seen corresponding path program 1 times [2022-12-13 18:47:42,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:42,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923938532] [2022-12-13 18:47:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:47:42,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:42,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:42,380 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:42,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 18:47:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:47:42,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 18:47:42,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:42,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:42,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:42,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:42,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:42,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:42,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:42,765 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-12-13 18:47:42,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-12-13 18:47:42,799 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 18:47:42,799 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 31 treesize of output 27 [2022-12-13 18:47:42,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:42,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:47:42,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:42,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:47:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:47:42,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:47:42,925 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:47:42,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923938532] [2022-12-13 18:47:42,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923938532] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:47:42,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:47:42,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:47:42,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884012411] [2022-12-13 18:47:42,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:47:42,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:47:42,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:47:42,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:47:42,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:47:43,249 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 598 [2022-12-13 18:47:43,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 248.5) internal successors, (994), 4 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:43,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:47:43,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 598 [2022-12-13 18:47:43,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:47:50,023 INFO L130 PetriNetUnfolder]: 52468/65686 cut-off events. [2022-12-13 18:47:50,023 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 18:47:50,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130616 conditions, 65686 events. 52468/65686 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 3956. Compared 368473 event pairs, 32148 based on Foata normal form. 0/17876 useless extension candidates. Maximal degree in co-relation 130600. Up to 63940 conditions per place. [2022-12-13 18:47:50,353 INFO L137 encePairwiseOnDemand]: 595/598 looper letters, 75 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2022-12-13 18:47:50,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 82 transitions, 465 flow [2022-12-13 18:47:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:47:50,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:47:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 797 transitions. [2022-12-13 18:47:50,356 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4442586399108138 [2022-12-13 18:47:50,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 797 transitions. [2022-12-13 18:47:50,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 797 transitions. [2022-12-13 18:47:50,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:50,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 797 transitions. [2022-12-13 18:47:50,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:50,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:50,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:50,360 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 317 flow. Second operand 3 states and 797 transitions. [2022-12-13 18:47:50,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 82 transitions, 465 flow [2022-12-13 18:47:50,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 464 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:47:50,362 INFO L231 Difference]: Finished difference. Result has 74 places, 82 transitions, 314 flow [2022-12-13 18:47:50,362 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=74, PETRI_TRANSITIONS=82} [2022-12-13 18:47:50,362 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, -6 predicate places. [2022-12-13 18:47:50,362 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 82 transitions, 314 flow [2022-12-13 18:47:50,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 248.5) internal successors, (994), 4 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:50,363 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:50,363 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 18:47:50,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 18:47:50,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:50,565 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:47:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:50,566 INFO L85 PathProgramCache]: Analyzing trace with hash 45585849, now seen corresponding path program 2 times [2022-12-13 18:47:50,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:50,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724125721] [2022-12-13 18:47:50,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:47:50,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:50,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:50,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:50,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 18:47:50,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:47:50,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:47:50,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 18:47:50,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:50,997 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 18:47:50,997 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 18:47:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:47:51,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:47:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:47:51,776 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:47:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724125721] [2022-12-13 18:47:51,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724125721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:47:51,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:47:51,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:47:51,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626152746] [2022-12-13 18:47:51,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:47:51,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:47:51,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:47:51,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:47:51,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:47:57,335 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 598 [2022-12-13 18:47:57,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 82 transitions, 314 flow. Second operand has 12 states, 12 states have (on average 228.0) internal successors, (2736), 12 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:57,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:47:57,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 598 [2022-12-13 18:47:57,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:48:00,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:02,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:03,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:05,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:08,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:10,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:11,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:13,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:15,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:17,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:18,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:21,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:44,842 INFO L130 PetriNetUnfolder]: 157445/197139 cut-off events. [2022-12-13 18:48:44,843 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-12-13 18:48:45,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391811 conditions, 197139 events. 157445/197139 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 7672. Compared 1186711 event pairs, 96444 based on Foata normal form. 14/56851 useless extension candidates. Maximal degree in co-relation 391794. Up to 21326 conditions per place. [2022-12-13 18:48:45,849 INFO L137 encePairwiseOnDemand]: 588/598 looper letters, 415 selfloop transitions, 52 changer transitions 0/473 dead transitions. [2022-12-13 18:48:45,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 473 transitions, 2262 flow [2022-12-13 18:48:45,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 18:48:45,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 18:48:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4113 transitions. [2022-12-13 18:48:45,858 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42987040133779264 [2022-12-13 18:48:45,858 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4113 transitions. [2022-12-13 18:48:45,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4113 transitions. [2022-12-13 18:48:45,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:48:45,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4113 transitions. [2022-12-13 18:48:45,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 257.0625) internal successors, (4113), 16 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:48:45,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 598.0) internal successors, (10166), 17 states have internal predecessors, (10166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:48:45,894 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 598.0) internal successors, (10166), 17 states have internal predecessors, (10166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:48:45,894 INFO L175 Difference]: Start difference. First operand has 74 places, 82 transitions, 314 flow. Second operand 16 states and 4113 transitions. [2022-12-13 18:48:45,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 473 transitions, 2262 flow [2022-12-13 18:48:45,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 473 transitions, 2261 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:48:45,905 INFO L231 Difference]: Finished difference. Result has 98 places, 113 transitions, 694 flow [2022-12-13 18:48:45,905 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=694, PETRI_PLACES=98, PETRI_TRANSITIONS=113} [2022-12-13 18:48:45,906 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, 18 predicate places. [2022-12-13 18:48:45,906 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 113 transitions, 694 flow [2022-12-13 18:48:45,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 228.0) internal successors, (2736), 12 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:48:45,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:48:45,908 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:48:45,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 18:48:46,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:48:46,110 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:48:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:48:46,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1517387642, now seen corresponding path program 1 times [2022-12-13 18:48:46,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:48:46,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600800815] [2022-12-13 18:48:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:48:46,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:48:46,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:48:46,116 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:48:46,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 18:48:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:48:46,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:48:46,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:48:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:48:46,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:48:46,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:48:46,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600800815] [2022-12-13 18:48:46,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600800815] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:48:46,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:48:46,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:48:46,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871664714] [2022-12-13 18:48:46,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:48:46,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:48:46,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:48:46,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:48:46,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:48:46,383 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 598 [2022-12-13 18:48:46,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 113 transitions, 694 flow. Second operand has 4 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:48:46,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:48:46,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 598 [2022-12-13 18:48:46,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:49:11,720 INFO L130 PetriNetUnfolder]: 173448/219439 cut-off events. [2022-12-13 18:49:11,720 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2022-12-13 18:49:12,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436475 conditions, 219439 events. 173448/219439 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 8693. Compared 1380115 event pairs, 107730 based on Foata normal form. 0/67856 useless extension candidates. Maximal degree in co-relation 436447. Up to 191788 conditions per place. [2022-12-13 18:49:13,165 INFO L137 encePairwiseOnDemand]: 587/598 looper letters, 179 selfloop transitions, 3 changer transitions 0/188 dead transitions. [2022-12-13 18:49:13,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 188 transitions, 1496 flow [2022-12-13 18:49:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:49:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:49:13,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1070 transitions. [2022-12-13 18:49:13,168 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44732441471571904 [2022-12-13 18:49:13,168 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1070 transitions. [2022-12-13 18:49:13,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1070 transitions. [2022-12-13 18:49:13,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:49:13,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1070 transitions. [2022-12-13 18:49:13,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 267.5) internal successors, (1070), 4 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:13,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 598.0) internal successors, (2990), 5 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:13,173 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 598.0) internal successors, (2990), 5 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:13,174 INFO L175 Difference]: Start difference. First operand has 98 places, 113 transitions, 694 flow. Second operand 4 states and 1070 transitions. [2022-12-13 18:49:13,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 188 transitions, 1496 flow [2022-12-13 18:49:13,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 188 transitions, 1331 flow, removed 41 selfloop flow, removed 4 redundant places. [2022-12-13 18:49:13,179 INFO L231 Difference]: Finished difference. Result has 98 places, 113 transitions, 613 flow [2022-12-13 18:49:13,180 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=613, PETRI_PLACES=98, PETRI_TRANSITIONS=113} [2022-12-13 18:49:13,180 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, 18 predicate places. [2022-12-13 18:49:13,180 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 113 transitions, 613 flow [2022-12-13 18:49:13,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:13,181 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:49:13,181 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:49:13,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 18:49:13,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:49:13,383 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:49:13,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:49:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2072069628, now seen corresponding path program 1 times [2022-12-13 18:49:13,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:49:13,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169019192] [2022-12-13 18:49:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:49:13,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:49:13,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:49:13,389 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:49:13,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 18:49:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:49:13,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:49:13,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:49:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:49:13,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:49:13,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:49:13,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169019192] [2022-12-13 18:49:13,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169019192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:49:13,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:49:13,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:49:13,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977671018] [2022-12-13 18:49:13,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:49:13,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:49:13,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:49:13,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:49:13,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:49:13,813 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 598 [2022-12-13 18:49:13,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 113 transitions, 613 flow. Second operand has 6 states, 6 states have (on average 237.33333333333334) internal successors, (1424), 6 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:13,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:49:13,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 598 [2022-12-13 18:49:13,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:49:51,026 INFO L130 PetriNetUnfolder]: 253120/327479 cut-off events. [2022-12-13 18:49:51,027 INFO L131 PetriNetUnfolder]: For 13371/13539 co-relation queries the response was YES. [2022-12-13 18:49:52,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733996 conditions, 327479 events. 253120/327479 cut-off events. For 13371/13539 co-relation queries the response was YES. Maximal size of possible extension queue 15685. Compared 2342806 event pairs, 77981 based on Foata normal form. 520/129142 useless extension candidates. Maximal degree in co-relation 733966. Up to 125822 conditions per place. [2022-12-13 18:49:53,436 INFO L137 encePairwiseOnDemand]: 587/598 looper letters, 249 selfloop transitions, 18 changer transitions 0/272 dead transitions. [2022-12-13 18:49:53,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 272 transitions, 1533 flow [2022-12-13 18:49:53,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:49:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 18:49:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2108 transitions. [2022-12-13 18:49:53,441 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4406354515050167 [2022-12-13 18:49:53,441 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2108 transitions. [2022-12-13 18:49:53,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2108 transitions. [2022-12-13 18:49:53,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:49:53,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2108 transitions. [2022-12-13 18:49:53,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 263.5) internal successors, (2108), 8 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:53,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 598.0) internal successors, (5382), 9 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:53,448 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 598.0) internal successors, (5382), 9 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:53,448 INFO L175 Difference]: Start difference. First operand has 98 places, 113 transitions, 613 flow. Second operand 8 states and 2108 transitions. [2022-12-13 18:49:53,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 272 transitions, 1533 flow [2022-12-13 18:49:53,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 272 transitions, 1527 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 18:49:53,502 INFO L231 Difference]: Finished difference. Result has 108 places, 118 transitions, 708 flow [2022-12-13 18:49:53,502 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=708, PETRI_PLACES=108, PETRI_TRANSITIONS=118} [2022-12-13 18:49:53,502 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, 28 predicate places. [2022-12-13 18:49:53,503 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 118 transitions, 708 flow [2022-12-13 18:49:53,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 237.33333333333334) internal successors, (1424), 6 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:53,503 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:49:53,503 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:49:53,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 18:49:53,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:49:53,704 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:49:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:49:53,705 INFO L85 PathProgramCache]: Analyzing trace with hash 205884527, now seen corresponding path program 1 times [2022-12-13 18:49:53,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:49:53,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129500121] [2022-12-13 18:49:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:49:53,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:49:53,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:49:53,710 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:49:53,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 18:49:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:49:53,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 18:49:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:49:53,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:49:53,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:49:54,072 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-12-13 18:49:54,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 53 [2022-12-13 18:49:54,094 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 88 treesize of output 84 [2022-12-13 18:49:54,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:49:54,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:49:54,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:49:54,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:49:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:49:54,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:49:54,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:49:54,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129500121] [2022-12-13 18:49:54,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129500121] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:49:54,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:49:54,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:49:54,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98198856] [2022-12-13 18:49:54,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:49:54,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:49:54,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:49:54,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:49:54,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:49:54,511 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 598 [2022-12-13 18:49:54,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 118 transitions, 708 flow. Second operand has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:54,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:49:54,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 598 [2022-12-13 18:49:54,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:50:29,428 INFO L130 PetriNetUnfolder]: 225273/293054 cut-off events. [2022-12-13 18:50:29,428 INFO L131 PetriNetUnfolder]: For 83171/85729 co-relation queries the response was YES. [2022-12-13 18:50:30,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722698 conditions, 293054 events. 225273/293054 cut-off events. For 83171/85729 co-relation queries the response was YES. Maximal size of possible extension queue 14612. Compared 2103415 event pairs, 165039 based on Foata normal form. 1022/117168 useless extension candidates. Maximal degree in co-relation 722663. Up to 284792 conditions per place. [2022-12-13 18:50:31,602 INFO L137 encePairwiseOnDemand]: 595/598 looper letters, 108 selfloop transitions, 1 changer transitions 0/116 dead transitions. [2022-12-13 18:50:31,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 116 transitions, 922 flow [2022-12-13 18:50:31,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:50:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:50:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 795 transitions. [2022-12-13 18:50:31,604 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4431438127090301 [2022-12-13 18:50:31,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 795 transitions. [2022-12-13 18:50:31,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 795 transitions. [2022-12-13 18:50:31,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:50:31,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 795 transitions. [2022-12-13 18:50:31,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:50:31,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:50:31,608 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:50:31,608 INFO L175 Difference]: Start difference. First operand has 108 places, 118 transitions, 708 flow. Second operand 3 states and 795 transitions. [2022-12-13 18:50:31,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 116 transitions, 922 flow [2022-12-13 18:50:31,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 116 transitions, 916 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-12-13 18:50:31,824 INFO L231 Difference]: Finished difference. Result has 108 places, 116 transitions, 700 flow [2022-12-13 18:50:31,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=700, PETRI_PLACES=108, PETRI_TRANSITIONS=116} [2022-12-13 18:50:31,825 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, 28 predicate places. [2022-12-13 18:50:31,825 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 116 transitions, 700 flow [2022-12-13 18:50:31,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:50:31,825 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:50:31,825 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:50:31,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-12-13 18:50:32,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:50:32,027 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:50:32,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:50:32,028 INFO L85 PathProgramCache]: Analyzing trace with hash 205884525, now seen corresponding path program 1 times [2022-12-13 18:50:32,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:50:32,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067750949] [2022-12-13 18:50:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:50:32,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:50:32,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:50:32,033 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:50:32,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 18:50:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:50:32,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 18:50:32,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:50:32,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:50:32,289 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-12-13 18:50:32,289 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-12-13 18:50:32,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:50:32,341 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 20 [2022-12-13 18:50:32,366 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 18:50:32,366 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 [2022-12-13 18:50:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:50:32,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:50:32,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:50:32,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067750949] [2022-12-13 18:50:32,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067750949] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:50:32,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:50:32,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:50:32,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582469592] [2022-12-13 18:50:32,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:50:32,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:50:32,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:50:32,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:50:32,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:50:32,743 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 598 [2022-12-13 18:50:32,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 116 transitions, 700 flow. Second operand has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:50:32,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:50:32,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 598 [2022-12-13 18:50:32,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:51:07,111 INFO L130 PetriNetUnfolder]: 222418/288872 cut-off events. [2022-12-13 18:51:07,111 INFO L131 PetriNetUnfolder]: For 82050/84594 co-relation queries the response was YES. [2022-12-13 18:51:08,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712549 conditions, 288872 events. 222418/288872 cut-off events. For 82050/84594 co-relation queries the response was YES. Maximal size of possible extension queue 14699. Compared 2064958 event pairs, 162936 based on Foata normal form. 1008/116274 useless extension candidates. Maximal degree in co-relation 712512. Up to 280610 conditions per place. [2022-12-13 18:51:09,550 INFO L137 encePairwiseOnDemand]: 595/598 looper letters, 106 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2022-12-13 18:51:09,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 114 transitions, 910 flow [2022-12-13 18:51:09,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:51:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:51:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 790 transitions. [2022-12-13 18:51:09,552 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4403567447045708 [2022-12-13 18:51:09,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 790 transitions. [2022-12-13 18:51:09,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 790 transitions. [2022-12-13 18:51:09,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:51:09,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 790 transitions. [2022-12-13 18:51:09,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:09,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:09,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:09,556 INFO L175 Difference]: Start difference. First operand has 108 places, 116 transitions, 700 flow. Second operand 3 states and 790 transitions. [2022-12-13 18:51:09,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 114 transitions, 910 flow [2022-12-13 18:51:09,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 114 transitions, 909 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:51:09,761 INFO L231 Difference]: Finished difference. Result has 107 places, 114 transitions, 697 flow [2022-12-13 18:51:09,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=697, PETRI_PLACES=107, PETRI_TRANSITIONS=114} [2022-12-13 18:51:09,762 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, 27 predicate places. [2022-12-13 18:51:09,762 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 114 transitions, 697 flow [2022-12-13 18:51:09,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:09,762 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:51:09,762 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:51:09,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 18:51:09,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:51:09,964 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:51:09,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:09,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2087445625, now seen corresponding path program 1 times [2022-12-13 18:51:09,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:51:09,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095005467] [2022-12-13 18:51:09,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:09,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:51:09,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:51:09,969 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:51:09,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 18:51:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:51:10,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 18:51:10,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:51:10,110 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 [2022-12-13 18:51:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:51:10,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:51:10,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:51:10,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095005467] [2022-12-13 18:51:10,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095005467] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:51:10,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:51:10,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:51:10,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399170007] [2022-12-13 18:51:10,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:51:10,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:51:10,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:51:10,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:51:10,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:51:10,334 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 598 [2022-12-13 18:51:10,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 114 transitions, 697 flow. Second operand has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:10,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:51:10,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 598 [2022-12-13 18:51:10,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:51:35,274 INFO L130 PetriNetUnfolder]: 162748/212510 cut-off events. [2022-12-13 18:51:35,274 INFO L131 PetriNetUnfolder]: For 69110/70814 co-relation queries the response was YES. [2022-12-13 18:51:36,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523330 conditions, 212510 events. 162748/212510 cut-off events. For 69110/70814 co-relation queries the response was YES. Maximal size of possible extension queue 10724. Compared 1496644 event pairs, 119224 based on Foata normal form. 864/92750 useless extension candidates. Maximal degree in co-relation 523292. Up to 206384 conditions per place. [2022-12-13 18:51:37,003 INFO L137 encePairwiseOnDemand]: 594/598 looper letters, 98 selfloop transitions, 7 changer transitions 0/112 dead transitions. [2022-12-13 18:51:37,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 112 transitions, 899 flow [2022-12-13 18:51:37,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:51:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:51:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 998 transitions. [2022-12-13 18:51:37,006 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41722408026755853 [2022-12-13 18:51:37,006 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 998 transitions. [2022-12-13 18:51:37,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 998 transitions. [2022-12-13 18:51:37,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:51:37,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 998 transitions. [2022-12-13 18:51:37,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 249.5) internal successors, (998), 4 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:37,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 598.0) internal successors, (2990), 5 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:37,010 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 598.0) internal successors, (2990), 5 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:37,010 INFO L175 Difference]: Start difference. First operand has 107 places, 114 transitions, 697 flow. Second operand 4 states and 998 transitions. [2022-12-13 18:51:37,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 112 transitions, 899 flow [2022-12-13 18:51:37,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 112 transitions, 898 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:51:37,153 INFO L231 Difference]: Finished difference. Result has 107 places, 112 transitions, 702 flow [2022-12-13 18:51:37,153 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=702, PETRI_PLACES=107, PETRI_TRANSITIONS=112} [2022-12-13 18:51:37,153 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, 27 predicate places. [2022-12-13 18:51:37,153 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 112 transitions, 702 flow [2022-12-13 18:51:37,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:37,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:51:37,154 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:51:37,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 18:51:37,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:51:37,355 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:51:37,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:37,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2087445621, now seen corresponding path program 1 times [2022-12-13 18:51:37,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:51:37,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188371856] [2022-12-13 18:51:37,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:37,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:51:37,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:51:37,361 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:51:37,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 18:51:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:51:37,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:51:37,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:51:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:51:37,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:51:37,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:51:37,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188371856] [2022-12-13 18:51:37,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188371856] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:51:37,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:51:37,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:51:37,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505950719] [2022-12-13 18:51:37,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:51:37,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:51:37,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:51:37,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:51:37,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:51:37,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 598 [2022-12-13 18:51:37,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 112 transitions, 702 flow. Second operand has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:37,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:51:37,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 598 [2022-12-13 18:51:37,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:52:06,245 INFO L130 PetriNetUnfolder]: 181588/241806 cut-off events. [2022-12-13 18:52:06,245 INFO L131 PetriNetUnfolder]: For 82290/83660 co-relation queries the response was YES. [2022-12-13 18:52:07,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601729 conditions, 241806 events. 181588/241806 cut-off events. For 82290/83660 co-relation queries the response was YES. Maximal size of possible extension queue 12124. Compared 1799895 event pairs, 137224 based on Foata normal form. 1034/117534 useless extension candidates. Maximal degree in co-relation 601690. Up to 206470 conditions per place. [2022-12-13 18:52:08,138 INFO L137 encePairwiseOnDemand]: 588/598 looper letters, 143 selfloop transitions, 13 changer transitions 0/163 dead transitions. [2022-12-13 18:52:08,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 163 transitions, 1276 flow [2022-12-13 18:52:08,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:52:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:52:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1055 transitions. [2022-12-13 18:52:08,141 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44105351170568563 [2022-12-13 18:52:08,141 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1055 transitions. [2022-12-13 18:52:08,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1055 transitions. [2022-12-13 18:52:08,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:52:08,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1055 transitions. [2022-12-13 18:52:08,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.75) internal successors, (1055), 4 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:08,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 598.0) internal successors, (2990), 5 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:08,145 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 598.0) internal successors, (2990), 5 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:08,146 INFO L175 Difference]: Start difference. First operand has 107 places, 112 transitions, 702 flow. Second operand 4 states and 1055 transitions. [2022-12-13 18:52:08,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 163 transitions, 1276 flow [2022-12-13 18:52:08,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 163 transitions, 1262 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:52:08,447 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 735 flow [2022-12-13 18:52:08,447 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=735, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2022-12-13 18:52:08,447 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, 29 predicate places. [2022-12-13 18:52:08,447 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 735 flow [2022-12-13 18:52:08,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:08,447 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:52:08,447 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:52:08,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-12-13 18:52:08,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:52:08,649 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:52:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:52:08,650 INFO L85 PathProgramCache]: Analyzing trace with hash 152385727, now seen corresponding path program 1 times [2022-12-13 18:52:08,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:52:08,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99170187] [2022-12-13 18:52:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:52:08,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:52:08,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:52:08,655 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:52:08,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 18:52:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:52:08,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:52:08,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:52:08,957 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 18:52:08,958 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 18:52:08,986 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 18:52:08,986 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 [2022-12-13 18:52:09,001 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 18:52:09,001 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 [2022-12-13 18:52:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:52:09,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:52:09,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:52:09,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99170187] [2022-12-13 18:52:09,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99170187] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:52:09,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:52:09,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:52:09,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443577234] [2022-12-13 18:52:09,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:52:09,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:52:09,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:52:09,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:52:09,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:52:09,150 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 598 [2022-12-13 18:52:09,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 735 flow. Second operand has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:09,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:52:09,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 598 [2022-12-13 18:52:09,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:52:29,746 INFO L130 PetriNetUnfolder]: 124150/166866 cut-off events. [2022-12-13 18:52:29,746 INFO L131 PetriNetUnfolder]: For 80682/81516 co-relation queries the response was YES. [2022-12-13 18:52:30,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465808 conditions, 166866 events. 124150/166866 cut-off events. For 80682/81516 co-relation queries the response was YES. Maximal size of possible extension queue 8391. Compared 1231221 event pairs, 92654 based on Foata normal form. 834/99464 useless extension candidates. Maximal degree in co-relation 465769. Up to 161559 conditions per place. [2022-12-13 18:52:31,157 INFO L137 encePairwiseOnDemand]: 594/598 looper letters, 91 selfloop transitions, 12 changer transitions 0/110 dead transitions. [2022-12-13 18:52:31,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 110 transitions, 931 flow [2022-12-13 18:52:31,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:52:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:52:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 996 transitions. [2022-12-13 18:52:31,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41638795986622074 [2022-12-13 18:52:31,160 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 996 transitions. [2022-12-13 18:52:31,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 996 transitions. [2022-12-13 18:52:31,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:52:31,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 996 transitions. [2022-12-13 18:52:31,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:31,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 598.0) internal successors, (2990), 5 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:31,164 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 598.0) internal successors, (2990), 5 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:31,164 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 735 flow. Second operand 4 states and 996 transitions. [2022-12-13 18:52:31,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 110 transitions, 931 flow [2022-12-13 18:52:31,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 110 transitions, 891 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 18:52:31,365 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 709 flow [2022-12-13 18:52:31,365 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=709, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2022-12-13 18:52:31,365 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, 28 predicate places. [2022-12-13 18:52:31,365 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 709 flow [2022-12-13 18:52:31,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:31,366 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:52:31,366 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:52:31,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-12-13 18:52:31,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:52:31,567 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:52:31,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:52:31,568 INFO L85 PathProgramCache]: Analyzing trace with hash 152385730, now seen corresponding path program 1 times [2022-12-13 18:52:31,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:52:31,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617322766] [2022-12-13 18:52:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:52:31,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:52:31,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:52:31,574 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:52:31,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 18:52:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:52:31,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:52:31,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:52:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:52:31,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:52:31,893 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 35 treesize of output 31 [2022-12-13 18:52:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:52:32,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:52:32,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617322766] [2022-12-13 18:52:32,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617322766] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:52:32,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:52:32,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 18:52:32,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858162287] [2022-12-13 18:52:32,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:52:32,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 18:52:32,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:52:32,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 18:52:32,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:52:33,444 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 598 [2022-12-13 18:52:33,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 709 flow. Second operand has 10 states, 10 states have (on average 231.6) internal successors, (2316), 10 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:33,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:52:33,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 598 [2022-12-13 18:52:33,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:52:53,512 INFO L130 PetriNetUnfolder]: 111838/149674 cut-off events. [2022-12-13 18:52:53,513 INFO L131 PetriNetUnfolder]: For 44619/45453 co-relation queries the response was YES. [2022-12-13 18:52:54,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420743 conditions, 149674 events. 111838/149674 cut-off events. For 44619/45453 co-relation queries the response was YES. Maximal size of possible extension queue 7346. Compared 1081661 event pairs, 42254 based on Foata normal form. 834/97496 useless extension candidates. Maximal degree in co-relation 420704. Up to 72105 conditions per place. [2022-12-13 18:52:54,762 INFO L137 encePairwiseOnDemand]: 589/598 looper letters, 168 selfloop transitions, 35 changer transitions 0/210 dead transitions. [2022-12-13 18:52:54,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 210 transitions, 1415 flow [2022-12-13 18:52:54,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:52:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 18:52:54,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1772 transitions. [2022-12-13 18:52:54,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42331581462016243 [2022-12-13 18:52:54,766 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1772 transitions. [2022-12-13 18:52:54,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1772 transitions. [2022-12-13 18:52:54,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:52:54,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1772 transitions. [2022-12-13 18:52:54,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 253.14285714285714) internal successors, (1772), 7 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:54,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 598.0) internal successors, (4784), 8 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:54,773 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 598.0) internal successors, (4784), 8 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:54,773 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 709 flow. Second operand 7 states and 1772 transitions. [2022-12-13 18:52:54,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 210 transitions, 1415 flow [2022-12-13 18:52:55,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 210 transitions, 1402 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:52:55,151 INFO L231 Difference]: Finished difference. Result has 114 places, 112 transitions, 794 flow [2022-12-13 18:52:55,151 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=794, PETRI_PLACES=114, PETRI_TRANSITIONS=112} [2022-12-13 18:52:55,152 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, 34 predicate places. [2022-12-13 18:52:55,152 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 112 transitions, 794 flow [2022-12-13 18:52:55,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 231.6) internal successors, (2316), 10 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:55,152 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:52:55,152 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:52:55,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-13 18:52:55,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:52:55,354 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:52:55,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:52:55,355 INFO L85 PathProgramCache]: Analyzing trace with hash 152385728, now seen corresponding path program 1 times [2022-12-13 18:52:55,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:52:55,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971682675] [2022-12-13 18:52:55,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:52:55,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:52:55,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:52:55,360 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:52:55,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 18:52:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:52:55,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 18:52:55,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:52:55,752 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 18:52:55,752 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 18:52:55,947 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 18:52:55,947 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 18:52:56,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:52:56,055 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 [2022-12-13 18:52:56,063 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:52:56,064 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 [2022-12-13 18:52:56,110 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 18:52:56,111 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 16 treesize of output 22 [2022-12-13 18:52:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:52:56,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:52:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:52:58,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:52:58,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971682675] [2022-12-13 18:52:58,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971682675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:52:58,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:52:58,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-12-13 18:52:58,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649160405] [2022-12-13 18:52:58,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:52:58,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 18:52:58,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:52:58,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 18:52:58,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-13 18:53:00,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:53:09,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:53:14,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:53:23,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:53:40,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:53:45,548 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 598 [2022-12-13 18:53:45,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 112 transitions, 794 flow. Second operand has 13 states, 13 states have (on average 208.23076923076923) internal successors, (2707), 13 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:45,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:45,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 598 [2022-12-13 18:53:45,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:52,132 WARN L233 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:53:58,329 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:54:09,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:54:18,256 WARN L539 Checker$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] [2022-12-13 18:55:28,974 INFO L130 PetriNetUnfolder]: 170118/228976 cut-off events. [2022-12-13 18:55:28,974 INFO L131 PetriNetUnfolder]: For 211246/214048 co-relation queries the response was YES. [2022-12-13 18:55:30,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662254 conditions, 228976 events. 170118/228976 cut-off events. For 211246/214048 co-relation queries the response was YES. Maximal size of possible extension queue 10641. Compared 1741224 event pairs, 124305 based on Foata normal form. 7906/160000 useless extension candidates. Maximal degree in co-relation 662213. Up to 144720 conditions per place. [2022-12-13 18:55:31,013 INFO L137 encePairwiseOnDemand]: 585/598 looper letters, 280 selfloop transitions, 56 changer transitions 0/343 dead transitions. [2022-12-13 18:55:31,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 343 transitions, 2632 flow [2022-12-13 18:55:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 18:55:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 18:55:31,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4172 transitions. [2022-12-13 18:55:31,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3671888751980285 [2022-12-13 18:55:31,021 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4172 transitions. [2022-12-13 18:55:31,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4172 transitions. [2022-12-13 18:55:31,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:55:31,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4172 transitions. [2022-12-13 18:55:31,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 219.57894736842104) internal successors, (4172), 19 states have internal predecessors, (4172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:31,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 598.0) internal successors, (11960), 20 states have internal predecessors, (11960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:31,036 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 598.0) internal successors, (11960), 20 states have internal predecessors, (11960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:31,036 INFO L175 Difference]: Start difference. First operand has 114 places, 112 transitions, 794 flow. Second operand 19 states and 4172 transitions. [2022-12-13 18:55:31,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 343 transitions, 2632 flow [2022-12-13 18:55:31,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 343 transitions, 2500 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-12-13 18:55:31,410 INFO L231 Difference]: Finished difference. Result has 133 places, 154 transitions, 1329 flow [2022-12-13 18:55:31,410 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1329, PETRI_PLACES=133, PETRI_TRANSITIONS=154} [2022-12-13 18:55:31,410 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, 53 predicate places. [2022-12-13 18:55:31,411 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 154 transitions, 1329 flow [2022-12-13 18:55:31,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 208.23076923076923) internal successors, (2707), 13 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:31,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:55:31,411 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:55:31,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 18:55:31,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:55:31,613 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:55:31,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:55:31,614 INFO L85 PathProgramCache]: Analyzing trace with hash -232232016, now seen corresponding path program 1 times [2022-12-13 18:55:31,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:55:31,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393142999] [2022-12-13 18:55:31,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:55:31,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:55:31,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:55:31,619 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:55:31,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 18:55:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:55:31,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 18:55:31,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:55:31,851 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 [2022-12-13 18:55:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:55:31,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:55:31,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:55:31,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393142999] [2022-12-13 18:55:31,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393142999] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:55:31,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:55:31,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:55:31,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834636611] [2022-12-13 18:55:31,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:55:31,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:55:31,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:55:31,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:55:31,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:55:32,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 598 [2022-12-13 18:55:32,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 154 transitions, 1329 flow. Second operand has 5 states, 5 states have (on average 234.8) internal successors, (1174), 5 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:32,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:55:32,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 598 [2022-12-13 18:55:32,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:14,009 INFO L130 PetriNetUnfolder]: 215785/302649 cut-off events. [2022-12-13 18:56:14,010 INFO L131 PetriNetUnfolder]: For 517459/519097 co-relation queries the response was YES. [2022-12-13 18:56:15,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955070 conditions, 302649 events. 215785/302649 cut-off events. For 517459/519097 co-relation queries the response was YES. Maximal size of possible extension queue 16067. Compared 2640279 event pairs, 104802 based on Foata normal form. 1638/230659 useless extension candidates. Maximal degree in co-relation 955025. Up to 151116 conditions per place. [2022-12-13 18:56:16,904 INFO L137 encePairwiseOnDemand]: 588/598 looper letters, 161 selfloop transitions, 51 changer transitions 0/219 dead transitions. [2022-12-13 18:56:16,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 219 transitions, 1984 flow [2022-12-13 18:56:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:56:16,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:56:16,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1283 transitions. [2022-12-13 18:56:16,908 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4290969899665552 [2022-12-13 18:56:16,908 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1283 transitions. [2022-12-13 18:56:16,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1283 transitions. [2022-12-13 18:56:16,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:16,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1283 transitions. [2022-12-13 18:56:16,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 256.6) internal successors, (1283), 5 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:16,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 598.0) internal successors, (3588), 6 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:16,912 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 598.0) internal successors, (3588), 6 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:16,912 INFO L175 Difference]: Start difference. First operand has 133 places, 154 transitions, 1329 flow. Second operand 5 states and 1283 transitions. [2022-12-13 18:56:16,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 219 transitions, 1984 flow [2022-12-13 18:56:18,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 219 transitions, 1969 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 18:56:18,220 INFO L231 Difference]: Finished difference. Result has 138 places, 155 transitions, 1478 flow [2022-12-13 18:56:18,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1478, PETRI_PLACES=138, PETRI_TRANSITIONS=155} [2022-12-13 18:56:18,221 INFO L288 CegarLoopForPetriNet]: 80 programPoint places, 58 predicate places. [2022-12-13 18:56:18,221 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 155 transitions, 1478 flow [2022-12-13 18:56:18,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.8) internal successors, (1174), 5 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:18,221 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:18,221 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:18,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 18:56:18,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:56:18,423 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 18:56:18,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:18,424 INFO L85 PathProgramCache]: Analyzing trace with hash 428997023, now seen corresponding path program 1 times [2022-12-13 18:56:18,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:56:18,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553281005] [2022-12-13 18:56:18,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:18,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:56:18,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:56:18,429 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:56:18,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d235319-9aee-4e9c-8ffe-d631d566bd93/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 18:56:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:18,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 18:56:18,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:18,568 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 [2022-12-13 18:56:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:56:18,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:56:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:56:19,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:56:19,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553281005] [2022-12-13 18:56:19,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553281005] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:56:19,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:56:19,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:56:19,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94110758] [2022-12-13 18:56:19,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:56:19,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:56:19,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:56:19,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:56:19,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:56:24,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 598 [2022-12-13 18:56:24,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 155 transitions, 1478 flow. Second operand has 12 states, 12 states have (on average 234.66666666666666) internal successors, (2816), 12 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:24,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:24,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 598 [2022-12-13 18:56:24,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand