./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya --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 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:02:04,195 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:02:04,275 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:02:04,279 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:02:04,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:02:04,304 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:02:04,304 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:02:04,305 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:02:04,305 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:02:04,306 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:02:04,306 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:02:04,307 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:02:04,308 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:02:04,308 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:02:04,309 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:02:04,309 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:02:04,310 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:02:04,310 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:02:04,311 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:02:04,311 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:02:04,312 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:02:04,312 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:02:04,313 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:02:04,313 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:02:04,314 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:02:04,314 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:02:04,315 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:02:04,315 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:02:04,316 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:02:04,316 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:02:04,316 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:02:04,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:02:04,317 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:02:04,317 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:02:04,318 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:02:04,318 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:02:04,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:02:04,318 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:02:04,318 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:02:04,318 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:02:04,319 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:02:04,319 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:02:04,319 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_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 [2023-11-29 06:02:04,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:02:04,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:02:04,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:02:04,575 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:02:04,575 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:02:04,576 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2023-11-29 06:02:07,310 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:02:07,589 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:02:07,589 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2023-11-29 06:02:07,609 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/data/7342ccd2d/41833d0bf4a64a558725cca5ea411b77/FLAG864c9674f [2023-11-29 06:02:07,625 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/data/7342ccd2d/41833d0bf4a64a558725cca5ea411b77 [2023-11-29 06:02:07,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:02:07,629 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:02:07,631 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:02:07,631 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:02:07,637 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:02:07,637 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:02:07" (1/1) ... [2023-11-29 06:02:07,638 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a5cde28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:07, skipping insertion in model container [2023-11-29 06:02:07,639 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:02:07" (1/1) ... [2023-11-29 06:02:07,705 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:02:08,068 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_d827a0bc-2a5c-4872-8708-e4de8e992ccb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[37019,37032] [2023-11-29 06:02:08,150 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_d827a0bc-2a5c-4872-8708-e4de8e992ccb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[47352,47365] [2023-11-29 06:02:08,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:02:08,174 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:02:08,202 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_d827a0bc-2a5c-4872-8708-e4de8e992ccb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[37019,37032] [2023-11-29 06:02:08,251 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_d827a0bc-2a5c-4872-8708-e4de8e992ccb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[47352,47365] [2023-11-29 06:02:08,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:02:08,305 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:02:08,311 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:02:08,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:08 WrapperNode [2023-11-29 06:02:08,312 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:02:08,312 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:02:08,313 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:02:08,313 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:02:08,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:08" (1/1) ... [2023-11-29 06:02:08,346 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:08" (1/1) ... [2023-11-29 06:02:08,409 INFO L138 Inliner]: procedures = 208, calls = 286, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1372 [2023-11-29 06:02:08,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:02:08,410 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:02:08,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:02:08,411 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:02:08,423 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:08" (1/1) ... [2023-11-29 06:02:08,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:08" (1/1) ... [2023-11-29 06:02:08,437 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:08" (1/1) ... [2023-11-29 06:02:08,527 INFO L175 MemorySlicer]: Split 261 memory accesses to 4 slices as follows [2, 220, 34, 5]. 84 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 55 writes are split as follows [0, 50, 4, 1]. [2023-11-29 06:02:08,527 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:08" (1/1) ... [2023-11-29 06:02:08,527 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:08" (1/1) ... [2023-11-29 06:02:08,563 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:08" (1/1) ... [2023-11-29 06:02:08,575 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:08" (1/1) ... [2023-11-29 06:02:08,581 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:08" (1/1) ... [2023-11-29 06:02:08,588 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:08" (1/1) ... [2023-11-29 06:02:08,598 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:02:08,599 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:02:08,599 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:02:08,599 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:02:08,600 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:08" (1/1) ... [2023-11-29 06:02:08,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:02:08,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:08,630 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:02:08,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:02:08,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-29 06:02:08,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-29 06:02:08,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-29 06:02:08,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-29 06:02:08,665 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-29 06:02:08,665 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-29 06:02:08,665 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-29 06:02:08,665 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-29 06:02:08,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:02:08,666 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-29 06:02:08,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 06:02:08,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 06:02:08,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 06:02:08,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-29 06:02:08,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:02:08,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:02:08,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:02:08,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:02:08,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:02:08,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 06:02:08,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 06:02:08,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:02:08,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:02:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:02:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:02:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:02:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:02:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 06:02:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 06:02:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 06:02:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-29 06:02:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:02:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:02:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:02:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:02:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:02:08,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:02:08,928 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:02:08,930 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:02:10,202 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:02:10,249 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:02:10,249 INFO L309 CfgBuilder]: Removed 63 assume(true) statements. [2023-11-29 06:02:10,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:02:10 BoogieIcfgContainer [2023-11-29 06:02:10,250 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:02:10,252 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:02:10,253 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:02:10,255 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:02:10,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:02:07" (1/3) ... [2023-11-29 06:02:10,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46320f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:02:10, skipping insertion in model container [2023-11-29 06:02:10,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:02:08" (2/3) ... [2023-11-29 06:02:10,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46320f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:02:10, skipping insertion in model container [2023-11-29 06:02:10,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:02:10" (3/3) ... [2023-11-29 06:02:10,257 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test2-2.i [2023-11-29 06:02:10,272 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:02:10,272 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-29 06:02:10,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:02:10,328 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;@4261e2e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:02:10,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 06:02:10,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 368 states, 355 states have (on average 1.7070422535211267) internal successors, (606), 362 states have internal predecessors, (606), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 06:02:10,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 06:02:10,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:10,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:10,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:10,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:10,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1120440825, now seen corresponding path program 1 times [2023-11-29 06:02:10,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:10,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837522513] [2023-11-29 06:02:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:10,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:02:10,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:10,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837522513] [2023-11-29 06:02:10,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837522513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:10,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:10,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:02:10,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964278994] [2023-11-29 06:02:10,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:10,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:02:10,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:10,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:02:10,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:02:10,527 INFO L87 Difference]: Start difference. First operand has 368 states, 355 states have (on average 1.7070422535211267) internal successors, (606), 362 states have internal predecessors, (606), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:10,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:10,597 INFO L93 Difference]: Finished difference Result 735 states and 1248 transitions. [2023-11-29 06:02:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:02:10,600 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-29 06:02:10,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:10,613 INFO L225 Difference]: With dead ends: 735 [2023-11-29 06:02:10,613 INFO L226 Difference]: Without dead ends: 333 [2023-11-29 06:02:10,618 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 [2023-11-29 06:02:10,622 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:10,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 548 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:02:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-29 06:02:10,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2023-11-29 06:02:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 321 states have (on average 1.5233644859813085) internal successors, (489), 327 states have internal predecessors, (489), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 06:02:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 505 transitions. [2023-11-29 06:02:10,683 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 505 transitions. Word has length 8 [2023-11-29 06:02:10,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:10,683 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 505 transitions. [2023-11-29 06:02:10,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:10,683 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 505 transitions. [2023-11-29 06:02:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 06:02:10,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:10,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:10,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:02:10,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:10,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:10,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1704108757, now seen corresponding path program 1 times [2023-11-29 06:02:10,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:10,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139670437] [2023-11-29 06:02:10,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:10,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:02:11,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:11,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139670437] [2023-11-29 06:02:11,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139670437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:11,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:11,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:02:11,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575348520] [2023-11-29 06:02:11,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:11,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:02:11,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:11,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:02:11,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:02:11,046 INFO L87 Difference]: Start difference. First operand 333 states and 505 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:11,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:11,227 INFO L93 Difference]: Finished difference Result 811 states and 1240 transitions. [2023-11-29 06:02:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:02:11,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-29 06:02:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:11,233 INFO L225 Difference]: With dead ends: 811 [2023-11-29 06:02:11,233 INFO L226 Difference]: Without dead ends: 655 [2023-11-29 06:02:11,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:02:11,235 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 476 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:11,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 1524 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:02:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2023-11-29 06:02:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 335. [2023-11-29 06:02:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 323 states have (on average 1.520123839009288) internal successors, (491), 329 states have internal predecessors, (491), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 06:02:11,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 507 transitions. [2023-11-29 06:02:11,263 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 507 transitions. Word has length 63 [2023-11-29 06:02:11,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:11,264 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 507 transitions. [2023-11-29 06:02:11,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:11,264 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 507 transitions. [2023-11-29 06:02:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 06:02:11,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:11,271 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:11,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:02:11,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:11,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:11,273 INFO L85 PathProgramCache]: Analyzing trace with hash 970656425, now seen corresponding path program 1 times [2023-11-29 06:02:11,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:11,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388393854] [2023-11-29 06:02:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:11,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:11,344 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:11,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377079546] [2023-11-29 06:02:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:11,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:11,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:11,348 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:11,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:02:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:11,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:02:11,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:02:11,754 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:02:11,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:11,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388393854] [2023-11-29 06:02:11,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:11,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377079546] [2023-11-29 06:02:11,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377079546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:11,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:11,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:02:11,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613995446] [2023-11-29 06:02:11,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:11,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:02:11,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:11,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:02:11,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:02:11,759 INFO L87 Difference]: Start difference. First operand 335 states and 507 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:11,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:11,853 INFO L93 Difference]: Finished difference Result 688 states and 1042 transitions. [2023-11-29 06:02:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:02:11,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2023-11-29 06:02:11,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:11,858 INFO L225 Difference]: With dead ends: 688 [2023-11-29 06:02:11,858 INFO L226 Difference]: Without dead ends: 356 [2023-11-29 06:02:11,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:02:11,860 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 9 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:11,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 950 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:02:11,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-11-29 06:02:11,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 355. [2023-11-29 06:02:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 343 states have (on average 1.489795918367347) internal successors, (511), 349 states have internal predecessors, (511), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 06:02:11,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 527 transitions. [2023-11-29 06:02:11,875 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 527 transitions. Word has length 139 [2023-11-29 06:02:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:11,876 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 527 transitions. [2023-11-29 06:02:11,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:11,876 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 527 transitions. [2023-11-29 06:02:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 06:02:11,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:11,879 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:11,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:02:12,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:12,086 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:12,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:12,086 INFO L85 PathProgramCache]: Analyzing trace with hash 482609319, now seen corresponding path program 1 times [2023-11-29 06:02:12,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:12,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988043406] [2023-11-29 06:02:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:12,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:12,145 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:12,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177711970] [2023-11-29 06:02:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:12,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:12,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:12,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:12,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:02:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:12,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:02:12,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:02:12,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:02:12,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:12,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988043406] [2023-11-29 06:02:12,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:12,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177711970] [2023-11-29 06:02:12,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177711970] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:12,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:12,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:02:12,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857574733] [2023-11-29 06:02:12,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:12,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:02:12,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:12,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:02:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:02:12,507 INFO L87 Difference]: Start difference. First operand 355 states and 527 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:12,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:12,591 INFO L93 Difference]: Finished difference Result 531 states and 797 transitions. [2023-11-29 06:02:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:02:12,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2023-11-29 06:02:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:12,595 INFO L225 Difference]: With dead ends: 531 [2023-11-29 06:02:12,595 INFO L226 Difference]: Without dead ends: 376 [2023-11-29 06:02:12,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:02:12,597 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 8 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:12,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 952 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:02:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-11-29 06:02:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 375. [2023-11-29 06:02:12,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 363 states have (on average 1.462809917355372) internal successors, (531), 369 states have internal predecessors, (531), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 06:02:12,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 547 transitions. [2023-11-29 06:02:12,611 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 547 transitions. Word has length 139 [2023-11-29 06:02:12,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:12,612 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 547 transitions. [2023-11-29 06:02:12,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:12,612 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 547 transitions. [2023-11-29 06:02:12,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 06:02:12,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:12,615 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:12,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:02:12,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:12,822 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:12,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:12,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1511968617, now seen corresponding path program 1 times [2023-11-29 06:02:12,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:12,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594203401] [2023-11-29 06:02:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:12,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:12,874 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:12,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513251824] [2023-11-29 06:02:12,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:12,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:12,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:12,876 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:12,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:02:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:13,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:02:13,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:02:13,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:02:13,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:13,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594203401] [2023-11-29 06:02:13,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:13,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513251824] [2023-11-29 06:02:13,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513251824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:13,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:13,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:02:13,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844657565] [2023-11-29 06:02:13,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:13,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:02:13,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:13,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:02:13,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:02:13,255 INFO L87 Difference]: Start difference. First operand 375 states and 547 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:13,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:13,343 INFO L93 Difference]: Finished difference Result 734 states and 1078 transitions. [2023-11-29 06:02:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:02:13,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2023-11-29 06:02:13,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:13,346 INFO L225 Difference]: With dead ends: 734 [2023-11-29 06:02:13,347 INFO L226 Difference]: Without dead ends: 362 [2023-11-29 06:02:13,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:02:13,348 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 165 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:13,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1273 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:02:13,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-11-29 06:02:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 361. [2023-11-29 06:02:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 349 states have (on average 1.4613180515759312) internal successors, (510), 355 states have internal predecessors, (510), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 06:02:13,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 526 transitions. [2023-11-29 06:02:13,362 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 526 transitions. Word has length 139 [2023-11-29 06:02:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:13,362 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 526 transitions. [2023-11-29 06:02:13,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 526 transitions. [2023-11-29 06:02:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 06:02:13,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:13,365 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:13,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:02:13,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:13,566 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:13,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:13,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2063487479, now seen corresponding path program 1 times [2023-11-29 06:02:13,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:13,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736818966] [2023-11-29 06:02:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:13,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:13,616 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:13,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448387959] [2023-11-29 06:02:13,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:13,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:13,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:13,618 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:13,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:02:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:13,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:02:13,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:02:14,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:02:14,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:14,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736818966] [2023-11-29 06:02:14,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:14,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448387959] [2023-11-29 06:02:14,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448387959] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:14,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:14,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:02:14,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902601337] [2023-11-29 06:02:14,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:14,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:02:14,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:14,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:02:14,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:02:14,018 INFO L87 Difference]: Start difference. First operand 361 states and 526 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:14,118 INFO L93 Difference]: Finished difference Result 523 states and 772 transitions. [2023-11-29 06:02:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:02:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2023-11-29 06:02:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:14,122 INFO L225 Difference]: With dead ends: 523 [2023-11-29 06:02:14,122 INFO L226 Difference]: Without dead ends: 348 [2023-11-29 06:02:14,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:02:14,124 INFO L413 NwaCegarLoop]: 468 mSDtfsCounter, 163 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:14,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1382 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:02:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-29 06:02:14,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 347. [2023-11-29 06:02:14,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 335 states have (on average 1.4597014925373135) internal successors, (489), 341 states have internal predecessors, (489), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 06:02:14,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 505 transitions. [2023-11-29 06:02:14,140 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 505 transitions. Word has length 139 [2023-11-29 06:02:14,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:14,141 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 505 transitions. [2023-11-29 06:02:14,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:14,141 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 505 transitions. [2023-11-29 06:02:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 06:02:14,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:14,144 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:14,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:02:14,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:14,345 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:14,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:14,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1247434025, now seen corresponding path program 1 times [2023-11-29 06:02:14,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:14,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664590321] [2023-11-29 06:02:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:14,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:14,393 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:14,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622756601] [2023-11-29 06:02:14,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:14,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:14,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:14,396 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:14,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:02:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:14,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:02:14,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:02:14,778 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:02:14,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:14,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664590321] [2023-11-29 06:02:14,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:14,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622756601] [2023-11-29 06:02:14,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622756601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:14,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:14,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:02:14,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050704198] [2023-11-29 06:02:14,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:14,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:02:14,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:14,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:02:14,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:02:14,782 INFO L87 Difference]: Start difference. First operand 347 states and 505 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:14,844 INFO L93 Difference]: Finished difference Result 463 states and 668 transitions. [2023-11-29 06:02:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:02:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2023-11-29 06:02:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:14,847 INFO L225 Difference]: With dead ends: 463 [2023-11-29 06:02:14,848 INFO L226 Difference]: Without dead ends: 302 [2023-11-29 06:02:14,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:02:14,849 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 78 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:14,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1120 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:02:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-11-29 06:02:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2023-11-29 06:02:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 290 states have (on average 1.4206896551724137) internal successors, (412), 296 states have internal predecessors, (412), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 06:02:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 428 transitions. [2023-11-29 06:02:14,859 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 428 transitions. Word has length 139 [2023-11-29 06:02:14,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:14,859 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 428 transitions. [2023-11-29 06:02:14,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 428 transitions. [2023-11-29 06:02:14,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 06:02:14,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:14,861 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:14,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:02:15,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:15,062 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:15,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:15,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2018173973, now seen corresponding path program 1 times [2023-11-29 06:02:15,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:15,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326906854] [2023-11-29 06:02:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:15,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:15,110 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:15,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603529416] [2023-11-29 06:02:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:15,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:15,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:15,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:15,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:02:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:15,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:02:15,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:02:15,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:02:15,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:15,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326906854] [2023-11-29 06:02:15,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:15,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603529416] [2023-11-29 06:02:15,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603529416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:15,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:15,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:02:15,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053125506] [2023-11-29 06:02:15,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:15,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:02:15,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:15,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:02:15,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:02:15,726 INFO L87 Difference]: Start difference. First operand 302 states and 428 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:15,801 INFO L93 Difference]: Finished difference Result 808 states and 1158 transitions. [2023-11-29 06:02:15,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:02:15,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2023-11-29 06:02:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:15,806 INFO L225 Difference]: With dead ends: 808 [2023-11-29 06:02:15,806 INFO L226 Difference]: Without dead ends: 509 [2023-11-29 06:02:15,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:02:15,807 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 239 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:15,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 912 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:02:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-11-29 06:02:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 507. [2023-11-29 06:02:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 490 states have (on average 1.436734693877551) internal successors, (704), 501 states have internal predecessors, (704), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 06:02:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 730 transitions. [2023-11-29 06:02:15,828 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 730 transitions. Word has length 139 [2023-11-29 06:02:15,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:15,829 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 730 transitions. [2023-11-29 06:02:15,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:02:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 730 transitions. [2023-11-29 06:02:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-29 06:02:15,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:15,832 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:15,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:02:16,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:16,033 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:16,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:16,033 INFO L85 PathProgramCache]: Analyzing trace with hash 659354013, now seen corresponding path program 1 times [2023-11-29 06:02:16,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:16,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636953429] [2023-11-29 06:02:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:16,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:16,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:16,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442855744] [2023-11-29 06:02:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:16,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:16,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:16,086 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:16,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:02:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:16,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:02:16,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:02:16,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:02:16,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636953429] [2023-11-29 06:02:16,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442855744] [2023-11-29 06:02:16,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442855744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:16,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:16,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:02:16,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861948407] [2023-11-29 06:02:16,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:16,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:02:16,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:16,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:02:16,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:02:16,626 INFO L87 Difference]: Start difference. First operand 507 states and 730 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:02:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:16,942 INFO L93 Difference]: Finished difference Result 806 states and 1155 transitions. [2023-11-29 06:02:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:02:16,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 152 [2023-11-29 06:02:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:16,946 INFO L225 Difference]: With dead ends: 806 [2023-11-29 06:02:16,946 INFO L226 Difference]: Without dead ends: 419 [2023-11-29 06:02:16,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:02:16,948 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 645 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:16,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 748 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:02:16,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-11-29 06:02:16,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2023-11-29 06:02:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 407 states have (on average 1.4398034398034398) internal successors, (586), 413 states have internal predecessors, (586), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 06:02:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 602 transitions. [2023-11-29 06:02:16,967 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 602 transitions. Word has length 152 [2023-11-29 06:02:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:16,967 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 602 transitions. [2023-11-29 06:02:16,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:02:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 602 transitions. [2023-11-29 06:02:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-29 06:02:16,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:16,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:16,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 06:02:17,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:17,179 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:17,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:17,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1931283504, now seen corresponding path program 1 times [2023-11-29 06:02:17,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:17,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744944735] [2023-11-29 06:02:17,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:17,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:17,233 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:17,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757634154] [2023-11-29 06:02:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:17,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:17,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:17,235 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:17,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:02:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:17,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:02:17,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:17,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:02:17,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:02:17,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 06:02:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:02:17,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:02:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:02:18,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:18,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744944735] [2023-11-29 06:02:18,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:18,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757634154] [2023-11-29 06:02:18,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757634154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:02:18,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:02:18,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-29 06:02:18,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780886614] [2023-11-29 06:02:18,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:02:18,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:02:18,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:18,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:02:18,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:02:18,035 INFO L87 Difference]: Start difference. First operand 419 states and 602 transitions. Second operand has 9 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 06:02:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:18,333 INFO L93 Difference]: Finished difference Result 1324 states and 1892 transitions. [2023-11-29 06:02:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:02:18,337 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 162 [2023-11-29 06:02:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:18,343 INFO L225 Difference]: With dead ends: 1324 [2023-11-29 06:02:18,343 INFO L226 Difference]: Without dead ends: 1207 [2023-11-29 06:02:18,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 312 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:02:18,345 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 1990 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2004 SdHoareTripleChecker+Valid, 2259 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:18,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2004 Valid, 2259 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:02:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2023-11-29 06:02:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 813. [2023-11-29 06:02:18,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 797 states have (on average 1.4378920953575909) internal successors, (1146), 803 states have internal predecessors, (1146), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-29 06:02:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1168 transitions. [2023-11-29 06:02:18,372 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1168 transitions. Word has length 162 [2023-11-29 06:02:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:18,373 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1168 transitions. [2023-11-29 06:02:18,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 06:02:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1168 transitions. [2023-11-29 06:02:18,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2023-11-29 06:02:18,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:18,378 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:18,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:02:18,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:02:18,580 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:18,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:18,581 INFO L85 PathProgramCache]: Analyzing trace with hash -855401392, now seen corresponding path program 1 times [2023-11-29 06:02:18,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:18,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587925624] [2023-11-29 06:02:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:18,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:18,720 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:18,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526144376] [2023-11-29 06:02:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:18,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:18,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:18,721 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:18,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:02:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:19,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 06:02:19,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:19,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:02:19,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:02:19,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:02:19,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:02:20,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:02:20,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 06:02:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:02:20,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:02:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:02:20,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:20,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587925624] [2023-11-29 06:02:20,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:20,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526144376] [2023-11-29 06:02:20,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526144376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:02:20,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:02:20,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-29 06:02:20,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460329167] [2023-11-29 06:02:20,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:02:20,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:02:20,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:20,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:02:20,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:02:20,640 INFO L87 Difference]: Start difference. First operand 813 states and 1168 transitions. Second operand has 15 states, 15 states have (on average 46.53333333333333) internal successors, (698), 15 states have internal predecessors, (698), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 06:02:21,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:21,355 INFO L93 Difference]: Finished difference Result 2674 states and 3842 transitions. [2023-11-29 06:02:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 06:02:21,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 46.53333333333333) internal successors, (698), 15 states have internal predecessors, (698), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 390 [2023-11-29 06:02:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:21,372 INFO L225 Difference]: With dead ends: 2674 [2023-11-29 06:02:21,372 INFO L226 Difference]: Without dead ends: 2557 [2023-11-29 06:02:21,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 762 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:02:21,375 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 6379 mSDsluCounter, 4732 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6414 SdHoareTripleChecker+Valid, 5169 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:21,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6414 Valid, 5169 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:02:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2023-11-29 06:02:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 1833. [2023-11-29 06:02:21,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1811 states have (on average 1.4445057979017117) internal successors, (2616), 1817 states have internal predecessors, (2616), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:02:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 2650 transitions. [2023-11-29 06:02:21,477 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 2650 transitions. Word has length 390 [2023-11-29 06:02:21,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:21,478 INFO L495 AbstractCegarLoop]: Abstraction has 1833 states and 2650 transitions. [2023-11-29 06:02:21,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 46.53333333333333) internal successors, (698), 15 states have internal predecessors, (698), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 06:02:21,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 2650 transitions. [2023-11-29 06:02:21,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2023-11-29 06:02:21,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:21,506 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:21,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:02:21,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:21,707 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:21,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:21,708 INFO L85 PathProgramCache]: Analyzing trace with hash 966200464, now seen corresponding path program 2 times [2023-11-29 06:02:21,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:21,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872203404] [2023-11-29 06:02:21,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:21,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:21,989 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:21,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855469272] [2023-11-29 06:02:21,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:02:21,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:21,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:21,990 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:21,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:02:22,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:02:22,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:02:22,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:02:22,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:23,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:02:23,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:02:23,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 23 [2023-11-29 06:02:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3425 trivial. 0 not checked. [2023-11-29 06:02:24,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:02:24,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:24,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872203404] [2023-11-29 06:02:24,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:24,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855469272] [2023-11-29 06:02:24,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855469272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:24,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:24,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:02:24,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46881371] [2023-11-29 06:02:24,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:24,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:02:24,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:24,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:02:24,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:02:24,030 INFO L87 Difference]: Start difference. First operand 1833 states and 2650 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:02:24,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:24,790 INFO L93 Difference]: Finished difference Result 2059 states and 2965 transitions. [2023-11-29 06:02:24,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:02:24,790 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 846 [2023-11-29 06:02:24,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:24,801 INFO L225 Difference]: With dead ends: 2059 [2023-11-29 06:02:24,801 INFO L226 Difference]: Without dead ends: 1943 [2023-11-29 06:02:24,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 836 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:02:24,803 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 960 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 2358 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:24,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 2358 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:02:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2023-11-29 06:02:24,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1864. [2023-11-29 06:02:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1842 states have (on average 1.4370249728555917) internal successors, (2647), 1848 states have internal predecessors, (2647), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:02:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2681 transitions. [2023-11-29 06:02:24,878 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2681 transitions. Word has length 846 [2023-11-29 06:02:24,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:24,879 INFO L495 AbstractCegarLoop]: Abstraction has 1864 states and 2681 transitions. [2023-11-29 06:02:24,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:02:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2681 transitions. [2023-11-29 06:02:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 848 [2023-11-29 06:02:24,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:24,892 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:24,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:02:25,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 06:02:25,093 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:25,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:25,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1603140376, now seen corresponding path program 1 times [2023-11-29 06:02:25,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:25,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882103459] [2023-11-29 06:02:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:25,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:25,352 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:25,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169824096] [2023-11-29 06:02:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:25,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:25,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:25,354 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:25,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:03:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:03:42,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 4079 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 06:03:42,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:03:42,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:03:42,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:03:42,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:03:42,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:03:42,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 06:03:43,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:03:43,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 06:03:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 1689 proven. 323 refuted. 0 times theorem prover too weak. 1413 trivial. 0 not checked. [2023-11-29 06:03:43,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:03:44,004 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:03:44,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2023-11-29 06:03:55,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:03:55,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882103459] [2023-11-29 06:03:55,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:03:55,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169824096] [2023-11-29 06:03:55,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169824096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:03:55,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:03:55,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-29 06:03:55,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428352770] [2023-11-29 06:03:55,276 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:03:55,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:03:55,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:03:55,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:03:55,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:03:55,279 INFO L87 Difference]: Start difference. First operand 1864 states and 2681 transitions. Second operand has 16 states, 16 states have (on average 26.0625) internal successors, (417), 15 states have internal predecessors, (417), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:04:01,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:04:01,638 INFO L93 Difference]: Finished difference Result 3359 states and 4821 transitions. [2023-11-29 06:04:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:04:01,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 26.0625) internal successors, (417), 15 states have internal predecessors, (417), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 847 [2023-11-29 06:04:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:04:01,648 INFO L225 Difference]: With dead ends: 3359 [2023-11-29 06:04:01,648 INFO L226 Difference]: Without dead ends: 2096 [2023-11-29 06:04:01,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1633 GetRequests, 1596 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 06:04:01,651 INFO L413 NwaCegarLoop]: 1226 mSDtfsCounter, 1540 mSDsluCounter, 9767 mSDsCounter, 0 mSdLazyCounter, 5375 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 10993 SdHoareTripleChecker+Invalid, 5387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 5375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:04:01,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1554 Valid, 10993 Invalid, 5387 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [12 Valid, 5375 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-11-29 06:04:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2023-11-29 06:04:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1896. [2023-11-29 06:04:01,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1874 states have (on average 1.432230522945571) internal successors, (2684), 1880 states have internal predecessors, (2684), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:04:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2718 transitions. [2023-11-29 06:04:01,705 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2718 transitions. Word has length 847 [2023-11-29 06:04:01,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:04:01,706 INFO L495 AbstractCegarLoop]: Abstraction has 1896 states and 2718 transitions. [2023-11-29 06:04:01,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 26.0625) internal successors, (417), 15 states have internal predecessors, (417), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:04:01,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2718 transitions. [2023-11-29 06:04:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 848 [2023-11-29 06:04:01,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:04:01,715 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:04:01,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 06:04:01,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:04:01,916 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:04:01,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:04:01,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1928021542, now seen corresponding path program 1 times [2023-11-29 06:04:01,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:04:01,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951209017] [2023-11-29 06:04:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:01,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:04:02,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:04:02,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478452432] [2023-11-29 06:04:02,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:02,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:02,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:04:02,201 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:04:02,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:04:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:03,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 4077 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:04:03,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:04:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 1713 proven. 0 refuted. 0 times theorem prover too weak. 1712 trivial. 0 not checked. [2023-11-29 06:04:03,613 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:04:03,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:04:03,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951209017] [2023-11-29 06:04:03,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:04:03,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478452432] [2023-11-29 06:04:03,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478452432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:04:03,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:04:03,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:04:03,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472933623] [2023-11-29 06:04:03,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:04:03,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:04:03,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:04:03,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:04:03,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:04:03,616 INFO L87 Difference]: Start difference. First operand 1896 states and 2718 transitions. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:04:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:04:03,689 INFO L93 Difference]: Finished difference Result 3302 states and 4640 transitions. [2023-11-29 06:04:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:04:03,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 847 [2023-11-29 06:04:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:04:03,698 INFO L225 Difference]: With dead ends: 3302 [2023-11-29 06:04:03,698 INFO L226 Difference]: Without dead ends: 1414 [2023-11-29 06:04:03,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 844 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:04:03,701 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 78 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:04:03,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 904 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:04:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2023-11-29 06:04:03,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1414. [2023-11-29 06:04:03,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1392 states have (on average 1.3477011494252873) internal successors, (1876), 1398 states have internal predecessors, (1876), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:04:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1910 transitions. [2023-11-29 06:04:03,765 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1910 transitions. Word has length 847 [2023-11-29 06:04:03,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:04:03,766 INFO L495 AbstractCegarLoop]: Abstraction has 1414 states and 1910 transitions. [2023-11-29 06:04:03,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:04:03,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1910 transitions. [2023-11-29 06:04:03,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2023-11-29 06:04:03,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:04:03,777 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:04:03,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:04:03,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:04:03,978 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:04:03,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:04:03,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1523571915, now seen corresponding path program 1 times [2023-11-29 06:04:03,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:04:03,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741550043] [2023-11-29 06:04:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:03,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:04:04,202 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:04:04,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338114479] [2023-11-29 06:04:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:04,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:04,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:04:04,204 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:04:04,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:05:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:30,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 4080 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 06:05:30,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:05:30,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:05:30,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:05:30,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 06:05:30,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:05:30,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 06:05:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 901 proven. 33 refuted. 0 times theorem prover too weak. 2491 trivial. 0 not checked. [2023-11-29 06:05:30,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:05:31,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:05:31,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2023-11-29 06:05:32,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:05:32,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741550043] [2023-11-29 06:05:32,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:05:32,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338114479] [2023-11-29 06:05:32,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338114479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:05:32,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:05:32,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-29 06:05:32,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880351921] [2023-11-29 06:05:32,885 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:05:32,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:05:32,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:05:32,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:05:32,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:05:32,887 INFO L87 Difference]: Start difference. First operand 1414 states and 1910 transitions. Second operand has 15 states, 15 states have (on average 17.8) internal successors, (267), 14 states have internal predecessors, (267), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:05:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:05:36,184 INFO L93 Difference]: Finished difference Result 2742 states and 3727 transitions. [2023-11-29 06:05:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:05:36,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 17.8) internal successors, (267), 14 states have internal predecessors, (267), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 848 [2023-11-29 06:05:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:05:36,191 INFO L225 Difference]: With dead ends: 2742 [2023-11-29 06:05:36,191 INFO L226 Difference]: Without dead ends: 1499 [2023-11-29 06:05:36,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1635 GetRequests, 1601 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 06:05:36,194 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 739 mSDsluCounter, 3429 mSDsCounter, 0 mSdLazyCounter, 2003 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 3859 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:05:36,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 3859 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2003 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 06:05:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2023-11-29 06:05:36,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1414. [2023-11-29 06:05:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1392 states have (on average 1.3469827586206897) internal successors, (1875), 1398 states have internal predecessors, (1875), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:05:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1909 transitions. [2023-11-29 06:05:36,275 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1909 transitions. Word has length 848 [2023-11-29 06:05:36,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:05:36,275 INFO L495 AbstractCegarLoop]: Abstraction has 1414 states and 1909 transitions. [2023-11-29 06:05:36,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.8) internal successors, (267), 14 states have internal predecessors, (267), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:05:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1909 transitions. [2023-11-29 06:05:36,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2023-11-29 06:05:36,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:05:36,284 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:05:36,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:05:36,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:05:36,485 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:05:36,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:05:36,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2018454776, now seen corresponding path program 2 times [2023-11-29 06:05:36,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:05:36,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863412886] [2023-11-29 06:05:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:05:36,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:05:36,709 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:05:36,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478099338] [2023-11-29 06:05:36,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:05:36,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:36,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:05:36,710 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:05:36,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:05:37,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:05:37,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:05:37,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 06:05:37,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:05:37,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:05:37,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 22 [2023-11-29 06:05:45,359 WARN L293 SmtUtils]: Spent 6.70s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:06:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3426 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3426 trivial. 0 not checked. [2023-11-29 06:06:21,454 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:06:21,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:21,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863412886] [2023-11-29 06:06:21,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:06:21,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478099338] [2023-11-29 06:06:21,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478099338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:06:21,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:06:21,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 06:06:21,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804791765] [2023-11-29 06:06:21,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:06:21,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:06:21,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:21,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:06:21,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:06:21,458 INFO L87 Difference]: Start difference. First operand 1414 states and 1909 transitions. Second operand has 13 states, 13 states have (on average 12.384615384615385) internal successors, (161), 13 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:06:23,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:06:23,994 INFO L93 Difference]: Finished difference Result 1540 states and 2085 transitions. [2023-11-29 06:06:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:06:23,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.384615384615385) internal successors, (161), 13 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 849 [2023-11-29 06:06:23,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:06:24,016 INFO L225 Difference]: With dead ends: 1540 [2023-11-29 06:06:24,017 INFO L226 Difference]: Without dead ends: 1424 [2023-11-29 06:06:24,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 837 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:06:24,018 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 14 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2498 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:06:24,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2498 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 06:06:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2023-11-29 06:06:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1420. [2023-11-29 06:06:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1398 states have (on average 1.34620886981402) internal successors, (1882), 1404 states have internal predecessors, (1882), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:06:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1916 transitions. [2023-11-29 06:06:24,079 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1916 transitions. Word has length 849 [2023-11-29 06:06:24,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:06:24,081 INFO L495 AbstractCegarLoop]: Abstraction has 1420 states and 1916 transitions. [2023-11-29 06:06:24,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.384615384615385) internal successors, (161), 13 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:06:24,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1916 transitions. [2023-11-29 06:06:24,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2023-11-29 06:06:24,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:06:24,092 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:24,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:06:24,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:06:24,293 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:06:24,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:24,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1801990089, now seen corresponding path program 1 times [2023-11-29 06:06:24,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:24,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884055972] [2023-11-29 06:06:24,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:24,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:24,578 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:06:24,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522615310] [2023-11-29 06:06:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:24,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:24,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:24,581 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:24,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:06:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:26,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 4080 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:06:26,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3426 backedges. 902 proven. 0 refuted. 0 times theorem prover too weak. 2524 trivial. 0 not checked. [2023-11-29 06:06:26,367 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:06:26,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:26,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884055972] [2023-11-29 06:06:26,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:06:26,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522615310] [2023-11-29 06:06:26,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522615310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:06:26,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:06:26,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:06:26,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326814350] [2023-11-29 06:06:26,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:06:26,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:06:26,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:26,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:06:26,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:06:26,371 INFO L87 Difference]: Start difference. First operand 1420 states and 1916 transitions. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:06:26,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:06:26,517 INFO L93 Difference]: Finished difference Result 2812 states and 3801 transitions. [2023-11-29 06:06:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:06:26,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 850 [2023-11-29 06:06:26,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:06:26,525 INFO L225 Difference]: With dead ends: 2812 [2023-11-29 06:06:26,525 INFO L226 Difference]: Without dead ends: 1428 [2023-11-29 06:06:26,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 846 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:06:26,528 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 12 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:06:26,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1230 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:06:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2023-11-29 06:06:26,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1420. [2023-11-29 06:06:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1398 states have (on average 1.3390557939914163) internal successors, (1872), 1404 states have internal predecessors, (1872), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:06:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1906 transitions. [2023-11-29 06:06:26,570 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1906 transitions. Word has length 850 [2023-11-29 06:06:26,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:06:26,570 INFO L495 AbstractCegarLoop]: Abstraction has 1420 states and 1906 transitions. [2023-11-29 06:06:26,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:06:26,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1906 transitions. [2023-11-29 06:06:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 853 [2023-11-29 06:06:26,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:06:26,578 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:26,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:06:26,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:06:26,779 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:06:26,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:26,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1978057865, now seen corresponding path program 1 times [2023-11-29 06:06:26,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:26,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780046113] [2023-11-29 06:06:26,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:26,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:27,032 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:06:27,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636020063] [2023-11-29 06:06:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:27,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:27,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:27,034 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:27,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:07:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:56,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 4078 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 06:07:56,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:56,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:07:56,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:07:56,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:07:56,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:07:57,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:07:57,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 06:07:57,511 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:07:57,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 06:07:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3427 backedges. 1855 proven. 584 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2023-11-29 06:07:57,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:58,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:07:58,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2023-11-29 06:08:18,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:08:18,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780046113] [2023-11-29 06:08:18,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:08:18,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636020063] [2023-11-29 06:08:18,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636020063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:08:18,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:08:18,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-29 06:08:18,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861436946] [2023-11-29 06:08:18,990 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:08:18,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:08:18,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:08:18,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:08:18,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2023-11-29 06:08:18,993 INFO L87 Difference]: Start difference. First operand 1420 states and 1906 transitions. Second operand has 18 states, 18 states have (on average 27.666666666666668) internal successors, (498), 17 states have internal predecessors, (498), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:08:20,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:08:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:08:26,530 INFO L93 Difference]: Finished difference Result 2617 states and 3547 transitions. [2023-11-29 06:08:26,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:08:26,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 27.666666666666668) internal successors, (498), 17 states have internal predecessors, (498), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 852 [2023-11-29 06:08:26,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:08:26,540 INFO L225 Difference]: With dead ends: 2617 [2023-11-29 06:08:26,541 INFO L226 Difference]: Without dead ends: 1743 [2023-11-29 06:08:26,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1643 GetRequests, 1603 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 06:08:26,543 INFO L413 NwaCegarLoop]: 1215 mSDtfsCounter, 1615 mSDsluCounter, 11524 mSDsCounter, 0 mSdLazyCounter, 4676 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1637 SdHoareTripleChecker+Valid, 12739 SdHoareTripleChecker+Invalid, 4690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 4676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:08:26,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1637 Valid, 12739 Invalid, 4690 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 4676 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-11-29 06:08:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2023-11-29 06:08:26,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1420. [2023-11-29 06:08:26,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1398 states have (on average 1.338340486409156) internal successors, (1871), 1404 states have internal predecessors, (1871), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:08:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1905 transitions. [2023-11-29 06:08:26,606 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1905 transitions. Word has length 852 [2023-11-29 06:08:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:08:26,607 INFO L495 AbstractCegarLoop]: Abstraction has 1420 states and 1905 transitions. [2023-11-29 06:08:26,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.666666666666668) internal successors, (498), 17 states have internal predecessors, (498), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:08:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1905 transitions. [2023-11-29 06:08:26,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2023-11-29 06:08:26,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:08:26,618 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:08:26,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:08:26,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:08:26,819 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:08:26,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:08:26,819 INFO L85 PathProgramCache]: Analyzing trace with hash 46445890, now seen corresponding path program 2 times [2023-11-29 06:08:26,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:08:26,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246421497] [2023-11-29 06:08:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:08:26,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:08:27,074 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:08:27,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233700383] [2023-11-29 06:08:27,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:08:27,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:08:27,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:08:27,076 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:08:27,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:08:28,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:08:28,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:08:28,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:08:28,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:08:38,942 WARN L293 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:08:47,787 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:09:00,721 WARN L293 SmtUtils]: Spent 7.83s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:09:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3431 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3431 trivial. 0 not checked. [2023-11-29 06:09:00,743 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:09:00,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:09:00,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246421497] [2023-11-29 06:09:00,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:09:00,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233700383] [2023-11-29 06:09:00,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233700383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:09:00,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:09:00,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:09:00,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372688027] [2023-11-29 06:09:00,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:09:00,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:09:00,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:09:00,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:09:00,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:09:00,745 INFO L87 Difference]: Start difference. First operand 1420 states and 1905 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:09:05,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:09:06,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:09:08,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:09:12,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:09:16,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:09:20,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:09:25,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:09:29,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:09:33,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:09:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:09:33,698 INFO L93 Difference]: Finished difference Result 1547 states and 2080 transitions. [2023-11-29 06:09:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:09:33,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 854 [2023-11-29 06:09:33,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:09:33,705 INFO L225 Difference]: With dead ends: 1547 [2023-11-29 06:09:33,705 INFO L226 Difference]: Without dead ends: 1425 [2023-11-29 06:09:33,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 855 GetRequests, 848 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:09:33,706 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 13 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 1 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:09:33,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1678 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 359 Invalid, 7 Unknown, 0 Unchecked, 32.9s Time] [2023-11-29 06:09:33,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2023-11-29 06:09:33,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1418. [2023-11-29 06:09:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1396 states have (on average 1.33810888252149) internal successors, (1868), 1402 states have internal predecessors, (1868), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:09:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 1902 transitions. [2023-11-29 06:09:33,762 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 1902 transitions. Word has length 854 [2023-11-29 06:09:33,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:09:33,762 INFO L495 AbstractCegarLoop]: Abstraction has 1418 states and 1902 transitions. [2023-11-29 06:09:33,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:09:33,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 1902 transitions. [2023-11-29 06:09:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2023-11-29 06:09:33,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:09:33,773 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:09:33,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:09:33,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:09:33,974 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:09:33,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:09:33,975 INFO L85 PathProgramCache]: Analyzing trace with hash 807903182, now seen corresponding path program 1 times [2023-11-29 06:09:33,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:09:33,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007984003] [2023-11-29 06:09:33,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:09:33,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:09:34,322 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:09:34,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730180815] [2023-11-29 06:09:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:09:34,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:09:34,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:09:34,323 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:09:34,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:11:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:11:00,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 4081 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:11:00,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:11:00,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:11:00,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 06:11:00,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:11:00,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 26 [2023-11-29 06:11:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3431 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 3132 trivial. 0 not checked. [2023-11-29 06:11:00,809 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:11:00,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:11:00,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007984003] [2023-11-29 06:11:00,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:11:00,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730180815] [2023-11-29 06:11:00,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730180815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:11:00,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:11:00,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:11:00,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399888025] [2023-11-29 06:11:00,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:11:00,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:11:00,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:11:00,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:11:00,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:11:00,811 INFO L87 Difference]: Start difference. First operand 1418 states and 1902 transitions. Second operand has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 11 states have internal predecessors, (197), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:11:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:11:02,013 INFO L93 Difference]: Finished difference Result 2883 states and 3893 transitions. [2023-11-29 06:11:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:11:02,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 11 states have internal predecessors, (197), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 855 [2023-11-29 06:11:02,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:11:02,021 INFO L225 Difference]: With dead ends: 2883 [2023-11-29 06:11:02,022 INFO L226 Difference]: Without dead ends: 1501 [2023-11-29 06:11:02,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 861 GetRequests, 844 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:11:02,024 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 573 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:11:02,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 1969 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 06:11:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2023-11-29 06:11:02,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1418. [2023-11-29 06:11:02,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1396 states have (on average 1.3373925501432664) internal successors, (1867), 1402 states have internal predecessors, (1867), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:11:02,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 1901 transitions. [2023-11-29 06:11:02,084 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 1901 transitions. Word has length 855 [2023-11-29 06:11:02,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:11:02,084 INFO L495 AbstractCegarLoop]: Abstraction has 1418 states and 1901 transitions. [2023-11-29 06:11:02,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 11 states have internal predecessors, (197), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:11:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 1901 transitions. [2023-11-29 06:11:02,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2023-11-29 06:11:02,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:11:02,095 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:11:02,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:11:02,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:02,296 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:11:02,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:11:02,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1782312199, now seen corresponding path program 2 times [2023-11-29 06:11:02,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:11:02,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355302820] [2023-11-29 06:11:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:02,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:11:02,538 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:11:02,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756201423] [2023-11-29 06:11:02,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:11:02,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:02,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:11:02,540 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:11:02,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:11:03,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:11:03,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:11:03,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 06:11:03,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:11:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3437 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3437 trivial. 0 not checked. [2023-11-29 06:11:04,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:11:04,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:11:04,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355302820] [2023-11-29 06:11:04,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:11:04,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756201423] [2023-11-29 06:11:04,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756201423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:11:04,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:11:04,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:11:04,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295390805] [2023-11-29 06:11:04,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:11:04,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:11:04,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:11:04,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:11:04,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:11:04,088 INFO L87 Difference]: Start difference. First operand 1418 states and 1901 transitions. Second operand has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:11:04,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:11:04,350 INFO L93 Difference]: Finished difference Result 1543 states and 2073 transitions. [2023-11-29 06:11:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:11:04,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 857 [2023-11-29 06:11:04,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:11:04,357 INFO L225 Difference]: With dead ends: 1543 [2023-11-29 06:11:04,357 INFO L226 Difference]: Without dead ends: 1423 [2023-11-29 06:11:04,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 852 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:11:04,358 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 6 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:11:04,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1435 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:11:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2023-11-29 06:11:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1422. [2023-11-29 06:11:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1400 states have (on average 1.3371428571428572) internal successors, (1872), 1406 states have internal predecessors, (1872), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:11:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1906 transitions. [2023-11-29 06:11:04,398 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1906 transitions. Word has length 857 [2023-11-29 06:11:04,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:11:04,399 INFO L495 AbstractCegarLoop]: Abstraction has 1422 states and 1906 transitions. [2023-11-29 06:11:04,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:11:04,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1906 transitions. [2023-11-29 06:11:04,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2023-11-29 06:11:04,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:11:04,407 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:11:04,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:11:04,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 06:11:04,608 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:11:04,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:11:04,608 INFO L85 PathProgramCache]: Analyzing trace with hash 880991772, now seen corresponding path program 1 times [2023-11-29 06:11:04,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:11:04,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686494149] [2023-11-29 06:11:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:04,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:11:04,892 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:11:04,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740830987] [2023-11-29 06:11:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:04,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:04,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:11:04,894 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:11:04,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:12:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:12:35,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 4081 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 06:12:35,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:12:35,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:12:35,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:12:35,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:12:35,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:12:36,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:12:36,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:12:36,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:12:36,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 06:12:36,755 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:12:36,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 06:12:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3437 backedges. 1731 proven. 1340 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-11-29 06:12:36,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:12:37,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:12:37,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2023-11-29 06:13:05,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:05,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686494149] [2023-11-29 06:13:05,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:13:05,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740830987] [2023-11-29 06:13:05,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740830987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:05,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:13:05,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-11-29 06:13:05,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538831147] [2023-11-29 06:13:05,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:05,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:13:05,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:05,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:13:05,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 06:13:05,574 INFO L87 Difference]: Start difference. First operand 1422 states and 1906 transitions. Second operand has 21 states, 21 states have (on average 31.19047619047619) internal successors, (655), 20 states have internal predecessors, (655), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:13:15,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:13:15,733 INFO L93 Difference]: Finished difference Result 2495 states and 3381 transitions. [2023-11-29 06:13:15,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:13:15,734 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 31.19047619047619) internal successors, (655), 20 states have internal predecessors, (655), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 857 [2023-11-29 06:13:15,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:13:15,742 INFO L225 Difference]: With dead ends: 2495 [2023-11-29 06:13:15,742 INFO L226 Difference]: Without dead ends: 1869 [2023-11-29 06:13:15,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1651 GetRequests, 1606 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 06:13:15,744 INFO L413 NwaCegarLoop]: 1668 mSDtfsCounter, 2001 mSDsluCounter, 20295 mSDsCounter, 0 mSdLazyCounter, 7103 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2030 SdHoareTripleChecker+Valid, 21963 SdHoareTripleChecker+Invalid, 7118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 7103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:13:15,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2030 Valid, 21963 Invalid, 7118 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15 Valid, 7103 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2023-11-29 06:13:15,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2023-11-29 06:13:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1422. [2023-11-29 06:13:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1400 states have (on average 1.3364285714285715) internal successors, (1871), 1406 states have internal predecessors, (1871), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:13:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1905 transitions. [2023-11-29 06:13:15,805 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1905 transitions. Word has length 857 [2023-11-29 06:13:15,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:13:15,805 INFO L495 AbstractCegarLoop]: Abstraction has 1422 states and 1905 transitions. [2023-11-29 06:13:15,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 31.19047619047619) internal successors, (655), 20 states have internal predecessors, (655), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:13:15,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1905 transitions. [2023-11-29 06:13:15,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2023-11-29 06:13:15,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:13:15,815 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:13:15,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:13:16,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 06:13:16,016 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:13:16,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:16,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1486373251, now seen corresponding path program 2 times [2023-11-29 06:13:16,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:16,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72216424] [2023-11-29 06:13:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:16,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:16,290 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:13:16,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994974038] [2023-11-29 06:13:16,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:13:16,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:16,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:16,291 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:16,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:13:17,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:13:17,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:17,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 06:13:17,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3445 trivial. 0 not checked. [2023-11-29 06:13:17,910 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:13:17,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:17,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72216424] [2023-11-29 06:13:17,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:13:17,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994974038] [2023-11-29 06:13:17,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994974038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:13:17,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:13:17,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:13:17,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881751777] [2023-11-29 06:13:17,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:13:17,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:13:17,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:17,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:13:17,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:13:17,913 INFO L87 Difference]: Start difference. First operand 1422 states and 1905 transitions. Second operand has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:13:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:13:18,202 INFO L93 Difference]: Finished difference Result 1551 states and 2082 transitions. [2023-11-29 06:13:18,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:13:18,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 859 [2023-11-29 06:13:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:13:18,208 INFO L225 Difference]: With dead ends: 1551 [2023-11-29 06:13:18,208 INFO L226 Difference]: Without dead ends: 1427 [2023-11-29 06:13:18,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 859 GetRequests, 853 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:13:18,209 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 11 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:13:18,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1684 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:13:18,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2023-11-29 06:13:18,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1422. [2023-11-29 06:13:18,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1400 states have (on average 1.3364285714285715) internal successors, (1871), 1406 states have internal predecessors, (1871), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:13:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1905 transitions. [2023-11-29 06:13:18,270 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1905 transitions. Word has length 859 [2023-11-29 06:13:18,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:13:18,271 INFO L495 AbstractCegarLoop]: Abstraction has 1422 states and 1905 transitions. [2023-11-29 06:13:18,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:13:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1905 transitions. [2023-11-29 06:13:18,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2023-11-29 06:13:18,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:13:18,299 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:13:18,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 06:13:18,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 06:13:18,500 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:13:18,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:18,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1015886380, now seen corresponding path program 1 times [2023-11-29 06:13:18,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:18,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066373984] [2023-11-29 06:13:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:18,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:18,787 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:13:18,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854375265] [2023-11-29 06:13:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:18,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:18,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:18,788 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:18,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:14:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:14:19,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 4079 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 06:14:19,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:14:19,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:14:19,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:14:19,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:14:19,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:14:19,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:14:19,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:14:19,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 06:14:20,289 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:14:20,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 06:14:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 1877 proven. 929 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2023-11-29 06:14:20,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:14:21,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:14:21,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2023-11-29 06:14:42,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:14:42,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066373984] [2023-11-29 06:14:42,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:14:42,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854375265] [2023-11-29 06:14:42,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854375265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:14:42,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:14:42,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-29 06:14:42,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001646435] [2023-11-29 06:14:42,435 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:14:42,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:14:42,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:14:42,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:14:42,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 06:14:42,437 INFO L87 Difference]: Start difference. First operand 1422 states and 1905 transitions. Second operand has 20 states, 20 states have (on average 29.1) internal successors, (582), 19 states have internal predecessors, (582), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:14:51,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:14:51,650 INFO L93 Difference]: Finished difference Result 2502 states and 3384 transitions. [2023-11-29 06:14:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:14:51,650 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 29.1) internal successors, (582), 19 states have internal predecessors, (582), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 859 [2023-11-29 06:14:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:14:51,655 INFO L225 Difference]: With dead ends: 2502 [2023-11-29 06:14:51,655 INFO L226 Difference]: Without dead ends: 1751 [2023-11-29 06:14:51,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1655 GetRequests, 1612 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 06:14:51,657 INFO L413 NwaCegarLoop]: 1356 mSDtfsCounter, 1370 mSDsluCounter, 16984 mSDsCounter, 0 mSdLazyCounter, 6234 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 18340 SdHoareTripleChecker+Invalid, 6247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 6234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:14:51,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 18340 Invalid, 6247 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13 Valid, 6234 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2023-11-29 06:14:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2023-11-29 06:14:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1422. [2023-11-29 06:14:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1400 states have (on average 1.3357142857142856) internal successors, (1870), 1406 states have internal predecessors, (1870), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:14:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1904 transitions. [2023-11-29 06:14:51,710 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1904 transitions. Word has length 859 [2023-11-29 06:14:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:14:51,711 INFO L495 AbstractCegarLoop]: Abstraction has 1422 states and 1904 transitions. [2023-11-29 06:14:51,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.1) internal successors, (582), 19 states have internal predecessors, (582), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:14:51,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1904 transitions. [2023-11-29 06:14:51,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 862 [2023-11-29 06:14:51,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:14:51,718 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 6, 6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:14:51,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:14:51,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:14:51,919 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:14:51,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:14:51,919 INFO L85 PathProgramCache]: Analyzing trace with hash 470959443, now seen corresponding path program 2 times [2023-11-29 06:14:51,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:14:51,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774634383] [2023-11-29 06:14:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:14:51,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:14:52,208 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:14:52,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143088855] [2023-11-29 06:14:52,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:14:52,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:14:52,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:14:52,210 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:14:52,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:14:53,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:14:53,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:14:53,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 06:14:53,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:14:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3455 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3455 trivial. 0 not checked. [2023-11-29 06:14:54,060 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:14:54,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:14:54,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774634383] [2023-11-29 06:14:54,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:14:54,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143088855] [2023-11-29 06:14:54,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143088855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:14:54,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:14:54,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:14:54,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574947023] [2023-11-29 06:14:54,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:14:54,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:14:54,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:14:54,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:14:54,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:14:54,064 INFO L87 Difference]: Start difference. First operand 1422 states and 1904 transitions. Second operand has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:14:54,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:14:54,394 INFO L93 Difference]: Finished difference Result 1551 states and 2081 transitions. [2023-11-29 06:14:54,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:14:54,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 861 [2023-11-29 06:14:54,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:14:54,398 INFO L225 Difference]: With dead ends: 1551 [2023-11-29 06:14:54,398 INFO L226 Difference]: Without dead ends: 1427 [2023-11-29 06:14:54,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 863 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:14:54,399 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 36 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:14:54,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1690 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:14:54,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2023-11-29 06:14:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1424. [2023-11-29 06:14:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1402 states have (on average 1.3352353780313837) internal successors, (1872), 1408 states have internal predecessors, (1872), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 06:14:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 1906 transitions. [2023-11-29 06:14:54,481 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 1906 transitions. Word has length 861 [2023-11-29 06:14:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:14:54,482 INFO L495 AbstractCegarLoop]: Abstraction has 1424 states and 1906 transitions. [2023-11-29 06:14:54,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:14:54,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 1906 transitions. [2023-11-29 06:14:54,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 863 [2023-11-29 06:14:54,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:14:54,490 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 6, 6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:14:54,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:14:54,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 06:14:54,691 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:14:54,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:14:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1476622144, now seen corresponding path program 1 times [2023-11-29 06:14:54,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:14:54,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386478366] [2023-11-29 06:14:54,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:14:54,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:14:54,986 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:14:54,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715966694] [2023-11-29 06:14:54,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:14:54,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:14:54,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:14:54,988 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:14:54,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d827a0bc-2a5c-4872-8708-e4de8e992ccb/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:15:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:47,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 4080 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 06:15:47,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:47,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:15:47,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:15:47,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:15:47,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:15:47,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:15:47,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:15:47,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:15:48,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:15:48,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:15:48,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:15:48,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 06:15:48,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:15:48,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 06:15:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3455 backedges. 405 proven. 3047 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:15:48,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:49,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:15:49,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2023-11-29 06:16:34,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:34,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386478366] [2023-11-29 06:16:35,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:16:35,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715966694] [2023-11-29 06:16:35,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715966694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:35,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:16:35,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-11-29 06:16:35,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286726237] [2023-11-29 06:16:35,001 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:35,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 06:16:35,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:35,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 06:16:35,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1473, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 06:16:35,004 INFO L87 Difference]: Start difference. First operand 1424 states and 1906 transitions. Second operand has 24 states, 24 states have (on average 35.666666666666664) internal successors, (856), 23 states have internal predecessors, (856), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)