./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --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 cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:22:14,969 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:22:15,047 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:22:15,053 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:22:15,053 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:22:15,080 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:22:15,080 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:22:15,081 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:22:15,082 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:22:15,082 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:22:15,083 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:22:15,083 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:22:15,084 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:22:15,085 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:22:15,086 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:22:15,086 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:22:15,087 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:22:15,087 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:22:15,088 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:22:15,089 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:22:15,089 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:22:15,099 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:22:15,100 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:22:15,100 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:22:15,101 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:22:15,101 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:22:15,101 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:22:15,102 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:22:15,103 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:22:15,103 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:22:15,104 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:22:15,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:22:15,105 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:22:15,105 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:22:15,106 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:22:15,106 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:22:15,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:22:15,106 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:22:15,107 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:22:15,107 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:22:15,107 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:22:15,108 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:22:15,108 INFO L153 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_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2023-11-21 22:22:15,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:22:15,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:22:15,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:22:15,410 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:22:15,410 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:22:15,411 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2023-11-21 22:22:18,605 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:22:18,829 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:22:18,829 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2023-11-21 22:22:18,838 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/data/b29a5383c/7c8974554e4b4a58b3a0d033ed089bcc/FLAG7180096e3 [2023-11-21 22:22:18,855 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/data/b29a5383c/7c8974554e4b4a58b3a0d033ed089bcc [2023-11-21 22:22:18,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:22:18,862 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:22:18,864 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:22:18,872 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:22:18,877 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:22:18,881 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:22:18" (1/1) ... [2023-11-21 22:22:18,882 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72fc21ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:18, skipping insertion in model container [2023-11-21 22:22:18,882 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:22:18" (1/1) ... [2023-11-21 22:22:18,912 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:22:19,061 WARN L240 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_c69f93f4-0a5b-4b98-9476-2b24b788d52e/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2023-11-21 22:22:19,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:22:19,109 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:22:19,121 WARN L240 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_c69f93f4-0a5b-4b98-9476-2b24b788d52e/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2023-11-21 22:22:19,133 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:22:19,148 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:22:19,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:19 WrapperNode [2023-11-21 22:22:19,149 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:22:19,150 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:22:19,150 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:22:19,150 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:22:19,158 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:19" (1/1) ... [2023-11-21 22:22:19,164 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:19" (1/1) ... [2023-11-21 22:22:19,190 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 116 [2023-11-21 22:22:19,191 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:22:19,192 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:22:19,192 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:22:19,192 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:22:19,203 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:19" (1/1) ... [2023-11-21 22:22:19,203 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:19" (1/1) ... [2023-11-21 22:22:19,206 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:19" (1/1) ... [2023-11-21 22:22:19,221 INFO L187 HeapSplitter]: Split 15 memory accesses to 2 slices as follows [2, 13] [2023-11-21 22:22:19,221 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:19" (1/1) ... [2023-11-21 22:22:19,222 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:19" (1/1) ... [2023-11-21 22:22:19,228 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:19" (1/1) ... [2023-11-21 22:22:19,237 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:19" (1/1) ... [2023-11-21 22:22:19,254 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:19" (1/1) ... [2023-11-21 22:22:19,255 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:19" (1/1) ... [2023-11-21 22:22:19,258 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:22:19,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:22:19,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:22:19,265 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:22:19,266 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:19" (1/1) ... [2023-11-21 22:22:19,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:22:19,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:22:19,303 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:22:19,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:22:19,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:22:19,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:22:19,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:22:19,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:22:19,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 22:22:19,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 22:22:19,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:22:19,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:22:19,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-21 22:22:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-21 22:22:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 22:22:19,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 22:22:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:22:19,467 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:22:19,470 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:22:19,647 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:22:19,732 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:22:19,732 INFO L308 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-21 22:22:19,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:22:19 BoogieIcfgContainer [2023-11-21 22:22:19,734 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:22:19,737 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:22:19,737 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:22:19,740 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:22:19,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:22:18" (1/3) ... [2023-11-21 22:22:19,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c59703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:22:19, skipping insertion in model container [2023-11-21 22:22:19,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:19" (2/3) ... [2023-11-21 22:22:19,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c59703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:22:19, skipping insertion in model container [2023-11-21 22:22:19,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:22:19" (3/3) ... [2023-11-21 22:22:19,743 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2023-11-21 22:22:19,762 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:22:19,763 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:22:19,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:22:19,819 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=LoopHeads, 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;@1deb2997, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:22:19,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:22:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:22:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 22:22:19,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:22:19,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:19,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:22:19,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:19,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2132052571, now seen corresponding path program 1 times [2023-11-21 22:22:19,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:22:19,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3886190] [2023-11-21 22:22:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:19,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:22:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:20,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:22:20,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3886190] [2023-11-21 22:22:20,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3886190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:22:20,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:22:20,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:22:20,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321869432] [2023-11-21 22:22:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:22:20,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:22:20,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:22:20,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:22:20,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:22:20,170 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2023-11-21 22:22:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:22:20,268 INFO L93 Difference]: Finished difference Result 52 states and 84 transitions. [2023-11-21 22:22:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:22:20,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2023-11-21 22:22:20,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:22:20,276 INFO L225 Difference]: With dead ends: 52 [2023-11-21 22:22:20,276 INFO L226 Difference]: Without dead ends: 31 [2023-11-21 22:22:20,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:22:20,282 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:22:20,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:22:20,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-21 22:22:20,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2023-11-21 22:22:20,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:22:20,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2023-11-21 22:22:20,326 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 9 [2023-11-21 22:22:20,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:22:20,326 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2023-11-21 22:22:20,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2023-11-21 22:22:20,327 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2023-11-21 22:22:20,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 22:22:20,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:22:20,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:20,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:22:20,329 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:22:20,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:20,330 INFO L85 PathProgramCache]: Analyzing trace with hash -353696715, now seen corresponding path program 1 times [2023-11-21 22:22:20,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:22:20,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986291443] [2023-11-21 22:22:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:20,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:22:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:20,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:22:20,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986291443] [2023-11-21 22:22:20,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986291443] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:22:20,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594591334] [2023-11-21 22:22:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:20,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:22:20,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:22:20,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:22:20,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:22:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:20,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:22:20,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:20,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:22:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:20,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594591334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:22:20,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:22:20,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-21 22:22:20,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290290575] [2023-11-21 22:22:20,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:22:20,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:22:20,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:22:20,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:22:20,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:22:20,652 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2023-11-21 22:22:20,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:22:20,841 INFO L93 Difference]: Finished difference Result 73 states and 114 transitions. [2023-11-21 22:22:20,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:22:20,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 [2023-11-21 22:22:20,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:22:20,843 INFO L225 Difference]: With dead ends: 73 [2023-11-21 22:22:20,844 INFO L226 Difference]: Without dead ends: 53 [2023-11-21 22:22:20,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:22:20,846 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:22:20,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 35 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:22:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-21 22:22:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-21 22:22:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-21 22:22:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 80 transitions. [2023-11-21 22:22:20,863 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 80 transitions. Word has length 11 [2023-11-21 22:22:20,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:22:20,864 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 80 transitions. [2023-11-21 22:22:20,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2023-11-21 22:22:20,864 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 80 transitions. [2023-11-21 22:22:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-21 22:22:20,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:22:20,881 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:20,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:22:21,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:22:21,082 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:22:21,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:21,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1240089788, now seen corresponding path program 2 times [2023-11-21 22:22:21,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:22:21,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190959132] [2023-11-21 22:22:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:21,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:22:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 22:22:21,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:22:21,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190959132] [2023-11-21 22:22:21,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190959132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:22:21,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:22:21,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:22:21,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006428060] [2023-11-21 22:22:21,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:22:21,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:22:21,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:22:21,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:22:21,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:22:21,347 INFO L87 Difference]: Start difference. First operand 53 states and 80 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2023-11-21 22:22:21,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:22:21,444 INFO L93 Difference]: Finished difference Result 99 states and 152 transitions. [2023-11-21 22:22:21,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:22:21,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 14 [2023-11-21 22:22:21,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:22:21,446 INFO L225 Difference]: With dead ends: 99 [2023-11-21 22:22:21,446 INFO L226 Difference]: Without dead ends: 54 [2023-11-21 22:22:21,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:22:21,448 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:22:21,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 39 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:22:21,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-21 22:22:21,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-21 22:22:21,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-21 22:22:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 81 transitions. [2023-11-21 22:22:21,463 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 81 transitions. Word has length 14 [2023-11-21 22:22:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:22:21,463 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 81 transitions. [2023-11-21 22:22:21,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2023-11-21 22:22:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 81 transitions. [2023-11-21 22:22:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:22:21,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:22:21,464 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:21,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:22:21,465 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:22:21,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:21,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1355145570, now seen corresponding path program 1 times [2023-11-21 22:22:21,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:22:21,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681967962] [2023-11-21 22:22:21,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:21,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:22:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 22:22:21,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:22:21,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681967962] [2023-11-21 22:22:21,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681967962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:22:21,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718918262] [2023-11-21 22:22:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:21,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:22:21,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:22:21,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:22:21,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:22:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:21,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:22:21,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:22:21,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:22:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:22:21,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718918262] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:22:21,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:22:21,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-11-21 22:22:21,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248632778] [2023-11-21 22:22:21,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:22:21,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:22:21,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:22:21,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:22:21,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:22:21,916 INFO L87 Difference]: Start difference. First operand 54 states and 81 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 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) [2023-11-21 22:22:22,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:22:22,260 INFO L93 Difference]: Finished difference Result 164 states and 267 transitions. [2023-11-21 22:22:22,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:22:22,261 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 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 15 [2023-11-21 22:22:22,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:22:22,263 INFO L225 Difference]: With dead ends: 164 [2023-11-21 22:22:22,264 INFO L226 Difference]: Without dead ends: 116 [2023-11-21 22:22:22,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=179, Unknown=0, NotChecked=0, Total=306 [2023-11-21 22:22:22,266 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 193 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:22:22,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 72 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:22:22,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-21 22:22:22,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2023-11-21 22:22:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 93 states have (on average 1.4731182795698925) internal successors, (137), 93 states have internal predecessors, (137), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-21 22:22:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 179 transitions. [2023-11-21 22:22:22,290 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 179 transitions. Word has length 15 [2023-11-21 22:22:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:22:22,291 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 179 transitions. [2023-11-21 22:22:22,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 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) [2023-11-21 22:22:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 179 transitions. [2023-11-21 22:22:22,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 22:22:22,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:22:22,292 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:22,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:22:22,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:22:22,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:22:22,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:22,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1956791900, now seen corresponding path program 2 times [2023-11-21 22:22:22,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:22:22,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277350192] [2023-11-21 22:22:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:22,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:22:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:22:22,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:22:22,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277350192] [2023-11-21 22:22:22,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277350192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:22:22,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841423817] [2023-11-21 22:22:22,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:22:22,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:22:22,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:22:22,850 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:22:22,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:22:22,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:22:22,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:22:22,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:22:22,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:22:22,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:22:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:22:23,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841423817] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:22:23,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:22:23,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-21 22:22:23,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839400535] [2023-11-21 22:22:23,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:22:23,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-21 22:22:23,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:22:23,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-21 22:22:23,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-21 22:22:23,226 INFO L87 Difference]: Start difference. First operand 116 states and 179 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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) [2023-11-21 22:22:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:22:23,876 INFO L93 Difference]: Finished difference Result 340 states and 561 transitions. [2023-11-21 22:22:23,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-21 22:22:23,877 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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 22 [2023-11-21 22:22:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:22:23,879 INFO L225 Difference]: With dead ends: 340 [2023-11-21 22:22:23,880 INFO L226 Difference]: Without dead ends: 236 [2023-11-21 22:22:23,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-21 22:22:23,882 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 556 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:22:23,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 57 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:22:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-11-21 22:22:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2023-11-21 22:22:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 189 states have (on average 1.4867724867724867) internal successors, (281), 189 states have internal predecessors, (281), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-21 22:22:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 371 transitions. [2023-11-21 22:22:23,922 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 371 transitions. Word has length 22 [2023-11-21 22:22:23,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:22:23,923 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 371 transitions. [2023-11-21 22:22:23,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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) [2023-11-21 22:22:23,923 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 371 transitions. [2023-11-21 22:22:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 22:22:23,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:22:23,925 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:23,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:22:24,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:22:24,150 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:22:24,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash 103627036, now seen corresponding path program 3 times [2023-11-21 22:22:24,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:22:24,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692318142] [2023-11-21 22:22:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:24,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:22:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:22:24,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:22:24,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692318142] [2023-11-21 22:22:24,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692318142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:22:24,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265944234] [2023-11-21 22:22:24,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:22:24,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:22:24,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:22:24,851 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:22:24,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:22:24,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-21 22:22:24,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:22:24,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:22:24,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-21 22:22:25,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:22:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-21 22:22:25,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265944234] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:22:25,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:22:25,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6, 6] total 33 [2023-11-21 22:22:25,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529572079] [2023-11-21 22:22:25,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:22:25,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-21 22:22:25,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:22:25,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-21 22:22:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=678, Unknown=0, NotChecked=0, Total=1056 [2023-11-21 22:22:25,144 INFO L87 Difference]: Start difference. First operand 236 states and 371 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 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) [2023-11-21 22:22:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:22:27,915 INFO L93 Difference]: Finished difference Result 552 states and 919 transitions. [2023-11-21 22:22:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-11-21 22:22:27,915 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 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 34 [2023-11-21 22:22:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:22:27,919 INFO L225 Difference]: With dead ends: 552 [2023-11-21 22:22:27,919 INFO L226 Difference]: Without dead ends: 340 [2023-11-21 22:22:27,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3289 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3914, Invalid=8296, Unknown=0, NotChecked=0, Total=12210 [2023-11-21 22:22:27,927 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 925 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:22:27,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 76 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:22:27,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-11-21 22:22:27,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 331. [2023-11-21 22:22:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 280 states have (on average 1.3571428571428572) internal successors, (380), 280 states have internal predecessors, (380), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-21 22:22:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 478 transitions. [2023-11-21 22:22:27,972 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 478 transitions. Word has length 34 [2023-11-21 22:22:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:22:27,973 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 478 transitions. [2023-11-21 22:22:27,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 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) [2023-11-21 22:22:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 478 transitions. [2023-11-21 22:22:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-21 22:22:27,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:22:27,974 INFO L195 NwaCegarLoop]: trace histogram [24, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:27,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:22:28,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:22:28,189 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:22:28,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:28,189 INFO L85 PathProgramCache]: Analyzing trace with hash -328910660, now seen corresponding path program 4 times [2023-11-21 22:22:28,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:22:28,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991173620] [2023-11-21 22:22:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:28,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:22:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 22:22:29,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:22:29,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991173620] [2023-11-21 22:22:29,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991173620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:22:29,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038808525] [2023-11-21 22:22:29,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:22:29,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:22:29,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:22:29,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:22:29,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:22:29,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:22:29,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:22:29,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-21 22:22:29,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 22:22:29,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:22:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 22:22:30,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038808525] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:22:30,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:22:30,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2023-11-21 22:22:30,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386994753] [2023-11-21 22:22:30,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:22:30,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-21 22:22:30,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:22:30,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-21 22:22:30,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-21 22:22:30,233 INFO L87 Difference]: Start difference. First operand 331 states and 478 transitions. Second operand has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 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) [2023-11-21 22:22:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:22:32,073 INFO L93 Difference]: Finished difference Result 922 states and 1423 transitions. [2023-11-21 22:22:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-21 22:22:32,073 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 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 40 [2023-11-21 22:22:32,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:22:32,080 INFO L225 Difference]: With dead ends: 922 [2023-11-21 22:22:32,080 INFO L226 Difference]: Without dead ends: 617 [2023-11-21 22:22:32,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-21 22:22:32,084 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1362 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:22:32,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1462 Valid, 79 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-21 22:22:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-11-21 22:22:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2023-11-21 22:22:32,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 514 states have (on average 1.3968871595330739) internal successors, (718), 514 states have internal predecessors, (718), 101 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-21 22:22:32,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 920 transitions. [2023-11-21 22:22:32,156 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 920 transitions. Word has length 40 [2023-11-21 22:22:32,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:22:32,157 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 920 transitions. [2023-11-21 22:22:32,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 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) [2023-11-21 22:22:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 920 transitions. [2023-11-21 22:22:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-21 22:22:32,171 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:22:32,172 INFO L195 NwaCegarLoop]: trace histogram [50, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:32,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:22:32,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:22:32,381 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:22:32,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:32,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1557742244, now seen corresponding path program 5 times [2023-11-21 22:22:32,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:22:32,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91582028] [2023-11-21 22:22:32,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:32,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:22:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 22:22:34,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:22:34,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91582028] [2023-11-21 22:22:34,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91582028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:22:34,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080994285] [2023-11-21 22:22:34,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:22:34,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:22:34,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:22:34,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:22:34,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f93f4-0a5b-4b98-9476-2b24b788d52e/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process