./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 --- 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-e04fb08 [2022-11-16 11:28:05,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:28:05,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:28:05,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:28:05,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:28:05,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:28:05,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:28:05,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:28:05,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:28:05,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:28:05,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:28:05,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:28:05,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:28:05,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:28:05,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:28:05,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:28:05,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:28:05,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:28:05,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:28:05,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:28:05,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:28:05,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:28:05,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:28:05,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:28:05,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:28:05,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:28:05,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:28:05,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:28:05,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:28:05,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:28:05,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:28:05,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:28:05,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:28:05,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:28:05,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:28:05,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:28:05,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:28:05,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:28:05,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:28:05,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:28:05,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:28:05,417 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:28:05,466 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:28:05,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:28:05,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:28:05,468 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:28:05,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:28:05,469 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:28:05,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:28:05,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:28:05,471 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:28:05,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:28:05,473 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:28:05,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:28:05,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:28:05,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:28:05,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:28:05,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:28:05,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:28:05,475 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:28:05,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:28:05,475 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:28:05,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:28:05,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:28:05,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:28:05,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:28:05,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:28:05,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:28:05,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:28:05,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:28:05,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:28:05,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:28:05,480 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:28:05,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:28:05,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:28:05,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 [2022-11-16 11:28:05,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:28:05,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:28:05,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:28:05,889 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:28:05,890 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:28:05,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2022-11-16 11:28:05,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/data/a986d05ad/4b1909c5611d4270b2427e29f08fe9f8/FLAG1abe155c7 [2022-11-16 11:28:06,569 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:28:06,569 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2022-11-16 11:28:06,575 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/data/a986d05ad/4b1909c5611d4270b2427e29f08fe9f8/FLAG1abe155c7 [2022-11-16 11:28:06,958 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/data/a986d05ad/4b1909c5611d4270b2427e29f08fe9f8 [2022-11-16 11:28:06,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:28:06,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:28:06,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:28:06,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:28:06,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:28:06,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:28:06" (1/1) ... [2022-11-16 11:28:06,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d6b79e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:06, skipping insertion in model container [2022-11-16 11:28:06,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:28:06" (1/1) ... [2022-11-16 11:28:06,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:28:07,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:28:07,245 WARN L229 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_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2022-11-16 11:28:07,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:28:07,312 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:28:07,336 WARN L229 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_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2022-11-16 11:28:07,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:28:07,394 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:28:07,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:07 WrapperNode [2022-11-16 11:28:07,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:28:07,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:28:07,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:28:07,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:28:07,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:07" (1/1) ... [2022-11-16 11:28:07,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:07" (1/1) ... [2022-11-16 11:28:07,458 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 137 [2022-11-16 11:28:07,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:28:07,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:28:07,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:28:07,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:28:07,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:07" (1/1) ... [2022-11-16 11:28:07,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:07" (1/1) ... [2022-11-16 11:28:07,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:07" (1/1) ... [2022-11-16 11:28:07,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:07" (1/1) ... [2022-11-16 11:28:07,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:07" (1/1) ... [2022-11-16 11:28:07,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:07" (1/1) ... [2022-11-16 11:28:07,507 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:07" (1/1) ... [2022-11-16 11:28:07,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:07" (1/1) ... [2022-11-16 11:28:07,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:28:07,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:28:07,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:28:07,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:28:07,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:07" (1/1) ... [2022-11-16 11:28:07,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:28:07,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:07,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:28:07,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:28:07,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:28:07,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:28:07,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:28:07,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:28:07,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:28:07,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:28:07,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:28:07,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 11:28:07,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 11:28:07,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:28:07,771 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:28:07,773 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:28:08,091 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:28:08,098 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:28:08,099 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-16 11:28:08,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:28:08 BoogieIcfgContainer [2022-11-16 11:28:08,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:28:08,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:28:08,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:28:08,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:28:08,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:28:06" (1/3) ... [2022-11-16 11:28:08,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cfab3c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:28:08, skipping insertion in model container [2022-11-16 11:28:08,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:07" (2/3) ... [2022-11-16 11:28:08,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cfab3c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:28:08, skipping insertion in model container [2022-11-16 11:28:08,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:28:08" (3/3) ... [2022-11-16 11:28:08,128 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2022-11-16 11:28:08,165 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:28:08,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:28:08,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:28:08,266 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@41532992, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:28:08,267 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:28:08,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:28:08,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:28:08,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:08,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:08,285 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:08,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:08,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1976888394, now seen corresponding path program 1 times [2022-11-16 11:28:08,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:08,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082598643] [2022-11-16 11:28:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:08,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:08,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:08,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082598643] [2022-11-16 11:28:08,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082598643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:08,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:08,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:28:08,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616546494] [2022-11-16 11:28:08,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:08,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:08,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:08,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:08,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:08,723 INFO L87 Difference]: Start difference. First operand has 41 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:08,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:08,844 INFO L93 Difference]: Finished difference Result 110 states and 169 transitions. [2022-11-16 11:28:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 11:28:08,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:08,869 INFO L225 Difference]: With dead ends: 110 [2022-11-16 11:28:08,877 INFO L226 Difference]: Without dead ends: 65 [2022-11-16 11:28:08,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:08,885 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 34 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:08,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 82 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:28:08,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-16 11:28:08,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2022-11-16 11:28:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:28:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-11-16 11:28:08,946 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 10 [2022-11-16 11:28:08,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:08,947 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-11-16 11:28:08,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-11-16 11:28:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:28:08,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:08,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:08,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:28:08,951 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:08,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1321690828, now seen corresponding path program 1 times [2022-11-16 11:28:08,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:08,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105914665] [2022-11-16 11:28:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:08,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:09,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:09,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105914665] [2022-11-16 11:28:09,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105914665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:28:09,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777330855] [2022-11-16 11:28:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:09,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:09,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:09,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:09,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:28:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:09,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:28:09,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:09,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:09,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777330855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:09,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:28:09,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 11:28:09,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531108544] [2022-11-16 11:28:09,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:09,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:28:09,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:09,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:28:09,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:28:09,319 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:09,549 INFO L93 Difference]: Finished difference Result 181 states and 243 transitions. [2022-11-16 11:28:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:28:09,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:28:09,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:09,554 INFO L225 Difference]: With dead ends: 181 [2022-11-16 11:28:09,554 INFO L226 Difference]: Without dead ends: 148 [2022-11-16 11:28:09,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:28:09,556 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 147 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:09,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 202 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:28:09,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-16 11:28:09,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 44. [2022-11-16 11:28:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:28:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-11-16 11:28:09,570 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 12 [2022-11-16 11:28:09,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:09,571 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-11-16 11:28:09,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:09,572 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-11-16 11:28:09,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:28:09,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:09,573 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:09,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:09,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:09,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:09,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:09,781 INFO L85 PathProgramCache]: Analyzing trace with hash -202652846, now seen corresponding path program 2 times [2022-11-16 11:28:09,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:09,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753626341] [2022-11-16 11:28:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:09,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:28:09,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:09,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753626341] [2022-11-16 11:28:09,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753626341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:09,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:09,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:28:09,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290809388] [2022-11-16 11:28:09,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:09,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:09,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:09,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:09,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:09,979 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:10,045 INFO L93 Difference]: Finished difference Result 82 states and 103 transitions. [2022-11-16 11:28:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:28:10,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:28:10,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:10,047 INFO L225 Difference]: With dead ends: 82 [2022-11-16 11:28:10,047 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 11:28:10,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:10,049 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:10,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 56 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:28:10,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 11:28:10,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-16 11:28:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:28:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-11-16 11:28:10,073 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 18 [2022-11-16 11:28:10,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:10,073 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-11-16 11:28:10,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-11-16 11:28:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 11:28:10,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:10,075 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:10,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:28:10,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1069304186, now seen corresponding path program 1 times [2022-11-16 11:28:10,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:10,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769713533] [2022-11-16 11:28:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:10,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 11:28:10,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:10,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769713533] [2022-11-16 11:28:10,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769713533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:10,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:10,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:28:10,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384176920] [2022-11-16 11:28:10,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:10,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:10,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:10,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:10,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:10,262 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:10,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:10,321 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2022-11-16 11:28:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:10,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-16 11:28:10,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:10,324 INFO L225 Difference]: With dead ends: 90 [2022-11-16 11:28:10,324 INFO L226 Difference]: Without dead ends: 59 [2022-11-16 11:28:10,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:10,327 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:10,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 63 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:28:10,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-16 11:28:10,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2022-11-16 11:28:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:28:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-11-16 11:28:10,347 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 31 [2022-11-16 11:28:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:10,348 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-11-16 11:28:10,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-11-16 11:28:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-16 11:28:10,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:10,350 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:10,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:28:10,350 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:10,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:10,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1327947132, now seen corresponding path program 1 times [2022-11-16 11:28:10,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:10,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682608728] [2022-11-16 11:28:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:10,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 11:28:10,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:10,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682608728] [2022-11-16 11:28:10,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682608728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:28:10,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014637086] [2022-11-16 11:28:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:10,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:10,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:10,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:10,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:28:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:10,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:28:10,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:28:10,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:28:10,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014637086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:10,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:28:10,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-16 11:28:10,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097952714] [2022-11-16 11:28:10,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:10,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:28:10,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:10,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:28:10,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:28:10,977 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:11,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:11,290 INFO L93 Difference]: Finished difference Result 187 states and 243 transitions. [2022-11-16 11:28:11,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:28:11,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-16 11:28:11,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:11,299 INFO L225 Difference]: With dead ends: 187 [2022-11-16 11:28:11,299 INFO L226 Difference]: Without dead ends: 150 [2022-11-16 11:28:11,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:28:11,306 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 177 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:11,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 176 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:28:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-16 11:28:11,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 72. [2022-11-16 11:28:11,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:28:11,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2022-11-16 11:28:11,332 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 33 [2022-11-16 11:28:11,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:11,333 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2022-11-16 11:28:11,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2022-11-16 11:28:11,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 11:28:11,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:11,338 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:11,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:11,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:11,547 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:11,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:11,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1439765920, now seen corresponding path program 1 times [2022-11-16 11:28:11,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:11,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590993601] [2022-11-16 11:28:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:11,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-16 11:28:11,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:11,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590993601] [2022-11-16 11:28:11,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590993601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:11,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:11,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:28:11,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83204702] [2022-11-16 11:28:11,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:11,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:11,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:11,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:11,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:11,752 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:11,773 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2022-11-16 11:28:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:28:11,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-16 11:28:11,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:11,775 INFO L225 Difference]: With dead ends: 94 [2022-11-16 11:28:11,775 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 11:28:11,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:28:11,776 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:11,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 95 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:28:11,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 11:28:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-16 11:28:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:28:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-11-16 11:28:11,787 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 53 [2022-11-16 11:28:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:11,787 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-11-16 11:28:11,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:11,788 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-11-16 11:28:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 11:28:11,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:11,789 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:11,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:28:11,789 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:11,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:11,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1385301982, now seen corresponding path program 2 times [2022-11-16 11:28:11,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:11,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077243078] [2022-11-16 11:28:11,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:11,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:28:12,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:12,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077243078] [2022-11-16 11:28:12,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077243078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:28:12,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990658770] [2022-11-16 11:28:12,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:28:12,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:12,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:12,144 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:12,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:28:12,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:28:12,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:12,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:28:12,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:28:12,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:28:12,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990658770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:12,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:28:12,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-16 11:28:12,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543249818] [2022-11-16 11:28:12,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:12,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 11:28:12,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:12,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 11:28:12,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:28:12,688 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:13,078 INFO L93 Difference]: Finished difference Result 261 states and 332 transitions. [2022-11-16 11:28:13,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:28:13,079 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-16 11:28:13,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:13,082 INFO L225 Difference]: With dead ends: 261 [2022-11-16 11:28:13,082 INFO L226 Difference]: Without dead ends: 220 [2022-11-16 11:28:13,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:28:13,087 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 268 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:13,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 187 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:28:13,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-16 11:28:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 88. [2022-11-16 11:28:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:28:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2022-11-16 11:28:13,136 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 54 [2022-11-16 11:28:13,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:13,136 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2022-11-16 11:28:13,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2022-11-16 11:28:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 11:28:13,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:13,138 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:13,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:13,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:13,348 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:13,348 INFO L85 PathProgramCache]: Analyzing trace with hash 359833914, now seen corresponding path program 3 times [2022-11-16 11:28:13,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:13,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920530756] [2022-11-16 11:28:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:13,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:28:14,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:14,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920530756] [2022-11-16 11:28:14,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920530756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:28:14,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621856812] [2022-11-16 11:28:14,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:28:14,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:14,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:14,276 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:14,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:28:14,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:28:14,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:14,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:28:14,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2022-11-16 11:28:14,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2022-11-16 11:28:14,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621856812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:14,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:28:14,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2022-11-16 11:28:14,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992882269] [2022-11-16 11:28:14,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:14,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:28:14,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:14,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:28:14,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:28:14,579 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:15,112 INFO L93 Difference]: Finished difference Result 314 states and 392 transitions. [2022-11-16 11:28:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:28:15,113 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-16 11:28:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:15,115 INFO L225 Difference]: With dead ends: 314 [2022-11-16 11:28:15,115 INFO L226 Difference]: Without dead ends: 273 [2022-11-16 11:28:15,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:28:15,117 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 591 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:15,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 379 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:28:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-16 11:28:15,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 134. [2022-11-16 11:28:15,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 131 states have (on average 1.1297709923664123) internal successors, (148), 131 states have internal predecessors, (148), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:28:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2022-11-16 11:28:15,142 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 78 [2022-11-16 11:28:15,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:15,143 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2022-11-16 11:28:15,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2022-11-16 11:28:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-16 11:28:15,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:15,145 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:15,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:15,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:28:15,351 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:15,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:15,351 INFO L85 PathProgramCache]: Analyzing trace with hash 140841668, now seen corresponding path program 4 times [2022-11-16 11:28:15,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:15,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249163738] [2022-11-16 11:28:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:15,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-16 11:28:16,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:16,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249163738] [2022-11-16 11:28:16,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249163738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:28:16,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093985965] [2022-11-16 11:28:16,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:28:16,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:16,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:16,528 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:16,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:28:16,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:28:16,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:16,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:28:16,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-16 11:28:16,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-16 11:28:17,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093985965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:17,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:28:17,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-11-16 11:28:17,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833304383] [2022-11-16 11:28:17,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:17,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 11:28:17,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:17,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 11:28:17,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 11:28:17,965 INFO L87 Difference]: Start difference. First operand 134 states and 150 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:19,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:19,140 INFO L93 Difference]: Finished difference Result 557 states and 709 transitions. [2022-11-16 11:28:19,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 11:28:19,141 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-16 11:28:19,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:19,144 INFO L225 Difference]: With dead ends: 557 [2022-11-16 11:28:19,144 INFO L226 Difference]: Without dead ends: 472 [2022-11-16 11:28:19,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 11:28:19,147 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 764 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:19,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 317 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:28:19,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-11-16 11:28:19,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 184. [2022-11-16 11:28:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 181 states have (on average 1.0939226519337018) internal successors, (198), 181 states have internal predecessors, (198), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:28:19,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 200 transitions. [2022-11-16 11:28:19,180 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 200 transitions. Word has length 116 [2022-11-16 11:28:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:19,180 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 200 transitions. [2022-11-16 11:28:19,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 200 transitions. [2022-11-16 11:28:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-16 11:28:19,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:19,184 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:19,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:19,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 11:28:19,391 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:19,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:19,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2022982902, now seen corresponding path program 5 times [2022-11-16 11:28:19,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:19,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552991811] [2022-11-16 11:28:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-16 11:28:22,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:22,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552991811] [2022-11-16 11:28:22,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552991811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:28:22,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966596743] [2022-11-16 11:28:22,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:28:22,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:22,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:22,792 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:22,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7023f5fc-65b3-4d7b-b679-8eadea1bd98e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process