./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_partition_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partition_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8 --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 6c4a57140d9977d38b2a20d40c88df51a4fcb7b14a0fb7c51e0b4e36cddf9998 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 21:52:58,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:52:58,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:52:58,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:52:58,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:52:58,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:52:58,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:52:58,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:52:58,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:52:58,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:52:58,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:52:58,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:52:58,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:52:58,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:52:58,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:52:58,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:52:58,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:52:58,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:52:58,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:52:58,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:52:58,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:52:58,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:52:58,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:52:58,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:52:58,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:52:58,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:52:58,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:52:58,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:52:58,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:52:58,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:52:58,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:52:58,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:52:58,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:52:58,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:52:58,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:52:58,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:52:58,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:52:58,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:52:58,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:52:58,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:52:58,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:52:58,506 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:52:58,521 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:52:58,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:52:58,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:52:58,521 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:52:58,522 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:52:58,522 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:52:58,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:52:58,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:52:58,522 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:52:58,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:52:58,523 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:52:58,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:52:58,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:52:58,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:52:58,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:52:58,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:52:58,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:52:58,524 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:52:58,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:52:58,524 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:52:58,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:52:58,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:52:58,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:52:58,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:52:58,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:52:58,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:52:58,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:52:58,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:52:58,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:52:58,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:52:58,525 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:52:58,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:52:58,525 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:52:58,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:52:58,526 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:52:58,526 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c4a57140d9977d38b2a20d40c88df51a4fcb7b14a0fb7c51e0b4e36cddf9998 [2022-12-13 21:52:58,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:52:58,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:52:58,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:52:58,708 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:52:58,709 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:52:58,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2022-12-13 21:53:01,272 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:53:01,417 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:53:01,418 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2022-12-13 21:53:01,422 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/data/f88105e23/266490f225a841b8a40c4da96cc73fc9/FLAG9d1592c18 [2022-12-13 21:53:01,435 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/data/f88105e23/266490f225a841b8a40c4da96cc73fc9 [2022-12-13 21:53:01,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:53:01,439 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:53:01,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:53:01,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:53:01,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:53:01,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:53:01" (1/1) ... [2022-12-13 21:53:01,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@495ef6e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:53:01, skipping insertion in model container [2022-12-13 21:53:01,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:53:01" (1/1) ... [2022-12-13 21:53:01,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:53:01,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:53:01,589 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/sv-benchmarks/c/array-examples/standard_partition_ground-1.i[860,873] [2022-12-13 21:53:01,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:53:01,610 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:53:01,619 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/sv-benchmarks/c/array-examples/standard_partition_ground-1.i[860,873] [2022-12-13 21:53:01,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:53:01,634 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:53:01,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:53:01 WrapperNode [2022-12-13 21:53:01,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:53:01,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:53:01,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:53:01,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:53:01,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:53:01" (1/1) ... [2022-12-13 21:53:01,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:53:01" (1/1) ... [2022-12-13 21:53:01,659 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 82 [2022-12-13 21:53:01,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:53:01,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:53:01,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:53:01,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:53:01,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:53:01" (1/1) ... [2022-12-13 21:53:01,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:53:01" (1/1) ... [2022-12-13 21:53:01,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:53:01" (1/1) ... [2022-12-13 21:53:01,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:53:01" (1/1) ... [2022-12-13 21:53:01,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:53:01" (1/1) ... [2022-12-13 21:53:01,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:53:01" (1/1) ... [2022-12-13 21:53:01,675 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:53:01" (1/1) ... [2022-12-13 21:53:01,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:53:01" (1/1) ... [2022-12-13 21:53:01,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:53:01,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:53:01,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:53:01,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:53:01,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:53:01" (1/1) ... [2022-12-13 21:53:01,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:53:01,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:53:01,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:53:01,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:53:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:53:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:53:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:53:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 21:53:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:53:01,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:53:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 21:53:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 21:53:01,742 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 21:53:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:53:01,798 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:53:01,800 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:53:01,927 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:53:01,931 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:53:01,931 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 21:53:01,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:53:01 BoogieIcfgContainer [2022-12-13 21:53:01,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:53:01,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:53:01,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:53:01,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:53:01,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:53:01" (1/3) ... [2022-12-13 21:53:01,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a790ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:53:01, skipping insertion in model container [2022-12-13 21:53:01,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:53:01" (2/3) ... [2022-12-13 21:53:01,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a790ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:53:01, skipping insertion in model container [2022-12-13 21:53:01,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:53:01" (3/3) ... [2022-12-13 21:53:01,939 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2022-12-13 21:53:01,953 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:53:01,953 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 21:53:01,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:53:01,996 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;@38b2265b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:53:01,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 21:53:02,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 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) [2022-12-13 21:53:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 21:53:02,007 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:53:02,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:53:02,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:53:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:53:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash 25564738, now seen corresponding path program 1 times [2022-12-13 21:53:02,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:53:02,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736544279] [2022-12-13 21:53:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:53:02,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:53:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:53:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:53:02,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:53:02,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736544279] [2022-12-13 21:53:02,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736544279] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:53:02,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:53:02,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:53:02,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978379617] [2022-12-13 21:53:02,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:53:02,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 21:53:02,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:53:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 21:53:02,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 21:53:02,200 INFO L87 Difference]: Start difference. First operand has 29 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-12-13 21:53:02,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:53:02,217 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2022-12-13 21:53:02,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 21:53:02,219 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 11 [2022-12-13 21:53:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:53:02,224 INFO L225 Difference]: With dead ends: 53 [2022-12-13 21:53:02,224 INFO L226 Difference]: Without dead ends: 25 [2022-12-13 21:53:02,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 21:53:02,229 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:53:02,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:53:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-13 21:53:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-12-13 21:53:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2022-12-13 21:53:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-12-13 21:53:02,257 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 11 [2022-12-13 21:53:02,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:53:02,258 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-12-13 21:53:02,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-12-13 21:53:02,258 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-12-13 21:53:02,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 21:53:02,258 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:53:02,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:53:02,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:53:02,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:53:02,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:53:02,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1555088748, now seen corresponding path program 1 times [2022-12-13 21:53:02,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:53:02,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797654984] [2022-12-13 21:53:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:53:02,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:53:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:53:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:53:02,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:53:02,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797654984] [2022-12-13 21:53:02,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797654984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:53:02,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:53:02,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:53:02,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693769871] [2022-12-13 21:53:02,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:53:02,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:53:02,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:53:02,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:53:02,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:53:02,352 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-12-13 21:53:02,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:53:02,382 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-12-13 21:53:02,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:53:02,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 11 [2022-12-13 21:53:02,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:53:02,383 INFO L225 Difference]: With dead ends: 51 [2022-12-13 21:53:02,383 INFO L226 Difference]: Without dead ends: 31 [2022-12-13 21:53:02,383 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 [2022-12-13 21:53:02,384 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:53:02,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:53:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-13 21:53:02,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2022-12-13 21:53:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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) [2022-12-13 21:53:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-12-13 21:53:02,390 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 11 [2022-12-13 21:53:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:53:02,390 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-12-13 21:53:02,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-12-13 21:53:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-12-13 21:53:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 21:53:02,396 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:53:02,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:53:02,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 21:53:02,397 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:53:02,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:53:02,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1378811952, now seen corresponding path program 1 times [2022-12-13 21:53:02,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:53:02,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75615753] [2022-12-13 21:53:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:53:02,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:53:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:53:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:53:02,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:53:02,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75615753] [2022-12-13 21:53:02,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75615753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:53:02,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872851854] [2022-12-13 21:53:02,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:53:02,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:53:02,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:53:02,481 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:53:02,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:53:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:53:02,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:53:02,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:53:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:53:02,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:53:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:53:02,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872851854] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:53:02,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:53:02,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 21:53:02,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481311] [2022-12-13 21:53:02,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:53:02,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:53:02,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:53:02,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:53:02,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:53:02,607 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-12-13 21:53:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:53:02,674 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2022-12-13 21:53:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:53:02,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 17 [2022-12-13 21:53:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:53:02,676 INFO L225 Difference]: With dead ends: 66 [2022-12-13 21:53:02,676 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 21:53:02,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:53:02,678 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:53:02,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 90 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:53:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 21:53:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-12-13 21:53:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 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) [2022-12-13 21:53:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-12-13 21:53:02,686 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 17 [2022-12-13 21:53:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:53:02,686 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-12-13 21:53:02,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-12-13 21:53:02,686 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-12-13 21:53:02,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 21:53:02,687 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:53:02,688 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:53:02,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:53:02,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:53:02,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:53:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:53:02,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1056905748, now seen corresponding path program 2 times [2022-12-13 21:53:02,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:53:02,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514031712] [2022-12-13 21:53:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:53:02,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:53:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:53:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-13 21:53:03,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:53:03,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514031712] [2022-12-13 21:53:03,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514031712] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:53:03,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:53:03,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:53:03,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959714260] [2022-12-13 21:53:03,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:53:03,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:53:03,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:53:03,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:53:03,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:53:03,018 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-12-13 21:53:03,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:53:03,049 INFO L93 Difference]: Finished difference Result 96 states and 122 transitions. [2022-12-13 21:53:03,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:53:03,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 35 [2022-12-13 21:53:03,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:53:03,051 INFO L225 Difference]: With dead ends: 96 [2022-12-13 21:53:03,051 INFO L226 Difference]: Without dead ends: 81 [2022-12-13 21:53:03,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:53:03,053 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:53:03,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:53:03,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-13 21:53:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2022-12-13 21:53:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 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) [2022-12-13 21:53:03,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2022-12-13 21:53:03,067 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 35 [2022-12-13 21:53:03,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:53:03,068 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2022-12-13 21:53:03,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-12-13 21:53:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2022-12-13 21:53:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 21:53:03,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:53:03,069 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:53:03,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 21:53:03,070 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:53:03,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:53:03,071 INFO L85 PathProgramCache]: Analyzing trace with hash 748532586, now seen corresponding path program 1 times [2022-12-13 21:53:03,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:53:03,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040845999] [2022-12-13 21:53:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:53:03,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:53:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:53:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 21:53:03,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:53:03,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040845999] [2022-12-13 21:53:03,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040845999] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:53:03,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924061339] [2022-12-13 21:53:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:53:03,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:53:03,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:53:03,235 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:53:03,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:53:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:53:03,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 21:53:03,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:53:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 21:53:03,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:53:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 21:53:03,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924061339] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:53:03,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:53:03,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 21:53:03,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194718112] [2022-12-13 21:53:03,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:53:03,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 21:53:03,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:53:03,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 21:53:03,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 21:53:03,391 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 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) [2022-12-13 21:53:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:53:03,508 INFO L93 Difference]: Finished difference Result 190 states and 271 transitions. [2022-12-13 21:53:03,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 21:53:03,508 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 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 35 [2022-12-13 21:53:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:53:03,509 INFO L225 Difference]: With dead ends: 190 [2022-12-13 21:53:03,509 INFO L226 Difference]: Without dead ends: 144 [2022-12-13 21:53:03,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 21:53:03,511 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 21:53:03,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 159 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 21:53:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-12-13 21:53:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-12-13 21:53:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.3214285714285714) internal successors, (185), 140 states have internal predecessors, (185), 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) [2022-12-13 21:53:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2022-12-13 21:53:03,524 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 35 [2022-12-13 21:53:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:53:03,524 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2022-12-13 21:53:03,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 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) [2022-12-13 21:53:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2022-12-13 21:53:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 21:53:03,526 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:53:03,526 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:53:03,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 21:53:03,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:53:03,727 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:53:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:53:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash -737484630, now seen corresponding path program 2 times [2022-12-13 21:53:03,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:53:03,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119898555] [2022-12-13 21:53:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:53:03,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:53:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:53:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-13 21:53:04,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:53:04,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119898555] [2022-12-13 21:53:04,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119898555] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:53:04,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777092617] [2022-12-13 21:53:04,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:53:04,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:53:04,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:53:04,070 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:53:04,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 21:53:04,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:53:04,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:53:04,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 21:53:04,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:53:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-13 21:53:04,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:53:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-13 21:53:04,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777092617] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:53:04,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:53:04,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-12-13 21:53:04,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070006715] [2022-12-13 21:53:04,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:53:04,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 21:53:04,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:53:04,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 21:53:04,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 21:53:04,371 INFO L87 Difference]: Start difference. First operand 144 states and 189 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 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) [2022-12-13 21:53:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:53:04,581 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2022-12-13 21:53:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 21:53:04,582 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 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 71 [2022-12-13 21:53:04,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:53:04,583 INFO L225 Difference]: With dead ends: 370 [2022-12-13 21:53:04,583 INFO L226 Difference]: Without dead ends: 288 [2022-12-13 21:53:04,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 21:53:04,584 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 233 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 21:53:04,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 143 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 21:53:04,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-12-13 21:53:04,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2022-12-13 21:53:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 284 states have (on average 1.3274647887323943) internal successors, (377), 284 states have internal predecessors, (377), 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) [2022-12-13 21:53:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 381 transitions. [2022-12-13 21:53:04,599 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 381 transitions. Word has length 71 [2022-12-13 21:53:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:53:04,599 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 381 transitions. [2022-12-13 21:53:04,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 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) [2022-12-13 21:53:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 381 transitions. [2022-12-13 21:53:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-13 21:53:04,602 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:53:04,602 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:53:04,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 21:53:04,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:53:04,804 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:53:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:53:04,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1759255338, now seen corresponding path program 3 times [2022-12-13 21:53:04,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:53:04,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101606364] [2022-12-13 21:53:04,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:53:04,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:53:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:53:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-12-13 21:53:05,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:53:05,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101606364] [2022-12-13 21:53:05,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101606364] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:53:05,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358801234] [2022-12-13 21:53:05,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:53:05,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:53:05,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:53:05,599 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:53:05,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 21:53:35,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-12-13 21:53:35,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:53:35,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 21:53:35,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:53:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-12-13 21:53:35,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:53:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-12-13 21:53:36,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358801234] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:53:36,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:53:36,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-12-13 21:53:36,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798654927] [2022-12-13 21:53:36,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:53:36,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 21:53:36,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:53:36,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 21:53:36,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 21:53:36,026 INFO L87 Difference]: Start difference. First operand 288 states and 381 transitions. Second operand has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 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) [2022-12-13 21:53:36,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:53:36,504 INFO L93 Difference]: Finished difference Result 730 states and 1063 transitions. [2022-12-13 21:53:36,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 21:53:36,504 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 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 143 [2022-12-13 21:53:36,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:53:36,507 INFO L225 Difference]: With dead ends: 730 [2022-12-13 21:53:36,507 INFO L226 Difference]: Without dead ends: 576 [2022-12-13 21:53:36,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 21:53:36,509 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 610 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 21:53:36,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 193 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 21:53:36,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-12-13 21:53:36,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2022-12-13 21:53:36,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 572 states have (on average 1.3304195804195804) internal successors, (761), 572 states have internal predecessors, (761), 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) [2022-12-13 21:53:36,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 765 transitions. [2022-12-13 21:53:36,541 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 765 transitions. Word has length 143 [2022-12-13 21:53:36,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:53:36,541 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 765 transitions. [2022-12-13 21:53:36,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 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) [2022-12-13 21:53:36,541 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 765 transitions. [2022-12-13 21:53:36,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-12-13 21:53:36,547 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:53:36,548 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:53:36,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 21:53:36,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:53:36,749 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:53:36,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:53:36,751 INFO L85 PathProgramCache]: Analyzing trace with hash 2061111338, now seen corresponding path program 4 times [2022-12-13 21:53:36,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:53:36,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344587946] [2022-12-13 21:53:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:53:36,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:53:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:53:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-12-13 21:53:38,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:53:38,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344587946] [2022-12-13 21:53:38,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344587946] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:53:38,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125605874] [2022-12-13 21:53:38,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 21:53:38,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:53:38,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:53:38,861 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:53:38,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 21:54:03,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 21:54:03,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:54:03,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 21:54:03,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:54:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-12-13 21:54:04,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:54:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-12-13 21:54:05,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125605874] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:54:05,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:54:05,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-12-13 21:54:05,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811279425] [2022-12-13 21:54:05,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:54:05,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-13 21:54:05,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:54:05,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-13 21:54:05,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-12-13 21:54:05,764 INFO L87 Difference]: Start difference. First operand 576 states and 765 transitions. Second operand has 97 states, 97 states have (on average 4.505154639175258) internal successors, (437), 97 states have internal predecessors, (437), 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) [2022-12-13 21:54:07,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:54:07,493 INFO L93 Difference]: Finished difference Result 1450 states and 2119 transitions. [2022-12-13 21:54:07,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-13 21:54:07,494 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.505154639175258) internal successors, (437), 97 states have internal predecessors, (437), 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 287 [2022-12-13 21:54:07,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:54:07,497 INFO L225 Difference]: With dead ends: 1450 [2022-12-13 21:54:07,497 INFO L226 Difference]: Without dead ends: 1152 [2022-12-13 21:54:07,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-12-13 21:54:07,500 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1139 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 21:54:07,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1139 Valid, 270 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 21:54:07,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-12-13 21:54:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2022-12-13 21:54:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1148 states have (on average 1.3318815331010454) internal successors, (1529), 1148 states have internal predecessors, (1529), 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) [2022-12-13 21:54:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1533 transitions. [2022-12-13 21:54:07,527 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1533 transitions. Word has length 287 [2022-12-13 21:54:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:54:07,527 INFO L495 AbstractCegarLoop]: Abstraction has 1152 states and 1533 transitions. [2022-12-13 21:54:07,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.505154639175258) internal successors, (437), 97 states have internal predecessors, (437), 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) [2022-12-13 21:54:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1533 transitions. [2022-12-13 21:54:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-12-13 21:54:07,537 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:54:07,537 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:54:07,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 21:54:07,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 21:54:07,739 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:54:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:54:07,740 INFO L85 PathProgramCache]: Analyzing trace with hash -465307094, now seen corresponding path program 5 times [2022-12-13 21:54:07,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:54:07,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031036130] [2022-12-13 21:54:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:54:07,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:54:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:54:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 26414 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2022-12-13 21:54:13,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:54:13,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031036130] [2022-12-13 21:54:13,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031036130] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:54:13,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306654498] [2022-12-13 21:54:13,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 21:54:13,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:54:13,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:54:13,450 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:54:13,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fa0548-b8ab-4f0e-979e-b3630749e3fc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process