./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.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_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme --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 713ae5dee39d08db1e818ebc31454a222c136fde7aad4a26405d3060cfa0eeea --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:48:29,105 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:48:29,224 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:48:29,236 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:48:29,237 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:48:29,273 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:48:29,274 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:48:29,275 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:48:29,276 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:48:29,277 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:48:29,277 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:48:29,278 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:48:29,279 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:48:29,279 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:48:29,280 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:48:29,281 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:48:29,281 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:48:29,282 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:48:29,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:48:29,283 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:48:29,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:48:29,285 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:48:29,285 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:48:29,286 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:48:29,287 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:48:29,287 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:48:29,288 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:48:29,288 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:48:29,289 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:48:29,289 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:48:29,290 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:48:29,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:48:29,291 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:48:29,291 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:48:29,292 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:48:29,292 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:48:29,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:48:29,293 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:48:29,294 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:48:29,294 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:48:29,295 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:48:29,296 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:48:29,296 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_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 713ae5dee39d08db1e818ebc31454a222c136fde7aad4a26405d3060cfa0eeea [2023-11-26 11:48:29,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:48:29,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:48:29,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:48:29,592 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:48:29,593 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:48:29,595 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i [2023-11-26 11:48:32,811 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:48:33,235 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:48:33,235 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i [2023-11-26 11:48:33,260 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/data/5cc3cc49a/ca327d7cdc2741c09d70a0d95cff21cd/FLAGacffe80c0 [2023-11-26 11:48:33,278 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/data/5cc3cc49a/ca327d7cdc2741c09d70a0d95cff21cd [2023-11-26 11:48:33,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:48:33,282 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:48:33,284 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:48:33,285 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:48:33,291 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:48:33,292 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:48:33" (1/1) ... [2023-11-26 11:48:33,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad38d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:33, skipping insertion in model container [2023-11-26 11:48:33,294 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:48:33" (1/1) ... [2023-11-26 11:48:33,371 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:48:33,881 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_2ab32184-ac39-4947-aa05-f7481b1bdb0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i[33021,33034] [2023-11-26 11:48:34,155 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_2ab32184-ac39-4947-aa05-f7481b1bdb0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i[49681,49694] [2023-11-26 11:48:34,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:48:34,220 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:48:34,260 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_2ab32184-ac39-4947-aa05-f7481b1bdb0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i[33021,33034] [2023-11-26 11:48:34,396 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_2ab32184-ac39-4947-aa05-f7481b1bdb0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i[49681,49694] [2023-11-26 11:48:34,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:48:34,531 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:48:34,558 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:48:34,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34 WrapperNode [2023-11-26 11:48:34,560 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:48:34,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:48:34,562 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:48:34,563 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:48:34,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34" (1/1) ... [2023-11-26 11:48:34,679 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34" (1/1) ... [2023-11-26 11:48:34,802 INFO L138 Inliner]: procedures = 177, calls = 487, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2208 [2023-11-26 11:48:34,803 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:48:34,804 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:48:34,804 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:48:34,804 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:48:34,817 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34" (1/1) ... [2023-11-26 11:48:34,818 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34" (1/1) ... [2023-11-26 11:48:34,841 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34" (1/1) ... [2023-11-26 11:48:35,083 INFO L175 MemorySlicer]: Split 453 memory accesses to 5 slices as follows [2, 5, 5, 417, 24]. 92 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 101 writes are split as follows [0, 1, 1, 98, 1]. [2023-11-26 11:48:35,083 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34" (1/1) ... [2023-11-26 11:48:35,083 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34" (1/1) ... [2023-11-26 11:48:35,167 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34" (1/1) ... [2023-11-26 11:48:35,199 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34" (1/1) ... [2023-11-26 11:48:35,214 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34" (1/1) ... [2023-11-26 11:48:35,238 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34" (1/1) ... [2023-11-26 11:48:35,265 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:48:35,267 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:48:35,267 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:48:35,267 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:48:35,268 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34" (1/1) ... [2023-11-26 11:48:35,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:48:35,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:35,311 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:48:35,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:48:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:48:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:48:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:48:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:48:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:48:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 11:48:35,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 11:48:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:48:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:48:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:48:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:48:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:48:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-26 11:48:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-26 11:48:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-26 11:48:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-26 11:48:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#4 [2023-11-26 11:48:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-26 11:48:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-26 11:48:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-26 11:48:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-26 11:48:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#4 [2023-11-26 11:48:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:48:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:48:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:48:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 11:48:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 11:48:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-26 11:48:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-26 11:48:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:48:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-26 11:48:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:48:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 11:48:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 11:48:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-26 11:48:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-26 11:48:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:48:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:48:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:48:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:48:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:48:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:48:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:48:35,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:48:35,719 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:48:35,721 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:48:38,060 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:48:38,133 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:48:38,133 INFO L309 CfgBuilder]: Removed 100 assume(true) statements. [2023-11-26 11:48:38,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:48:38 BoogieIcfgContainer [2023-11-26 11:48:38,134 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:48:38,137 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:48:38,138 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:48:38,141 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:48:38,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:48:33" (1/3) ... [2023-11-26 11:48:38,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2662cb9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:48:38, skipping insertion in model container [2023-11-26 11:48:38,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34" (2/3) ... [2023-11-26 11:48:38,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2662cb9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:48:38, skipping insertion in model container [2023-11-26 11:48:38,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:48:38" (3/3) ... [2023-11-26 11:48:38,145 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test5-3.i [2023-11-26 11:48:38,167 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:48:38,168 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-26 11:48:38,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:48:38,249 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;@3bd4e62b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:48:38,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-26 11:48:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand has 560 states, 544 states have (on average 1.7077205882352942) internal successors, (929), 551 states have internal predecessors, (929), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 11:48:38,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 11:48:38,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:38,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:38,268 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:38,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:38,275 INFO L85 PathProgramCache]: Analyzing trace with hash 526469056, now seen corresponding path program 1 times [2023-11-26 11:48:38,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:38,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417831215] [2023-11-26 11:48:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:38,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:38,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:38,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417831215] [2023-11-26 11:48:38,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:48:38,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940555417] [2023-11-26 11:48:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:38,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:38,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:38,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:38,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:48:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:38,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:48:38,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:38,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:38,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940555417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:38,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:38,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:48:38,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118276708] [2023-11-26 11:48:38,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:38,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:48:38,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:38,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:48:38,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:48:38,829 INFO L87 Difference]: Start difference. First operand has 560 states, 544 states have (on average 1.7077205882352942) internal successors, (929), 551 states have internal predecessors, (929), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-11-26 11:48:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:38,953 INFO L93 Difference]: Finished difference Result 1119 states and 1906 transitions. [2023-11-26 11:48:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:48:38,955 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2023-11-26 11:48:38,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:38,979 INFO L225 Difference]: With dead ends: 1119 [2023-11-26 11:48:38,980 INFO L226 Difference]: Without dead ends: 499 [2023-11-26 11:48:38,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:48:38,996 INFO L413 NwaCegarLoop]: 837 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, 837 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 [2023-11-26 11:48:38,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 837 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-11-26 11:48:39,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2023-11-26 11:48:39,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.5206611570247934) internal successors, (736), 490 states have internal predecessors, (736), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 11:48:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 758 transitions. [2023-11-26 11:48:39,090 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 758 transitions. Word has length 7 [2023-11-26 11:48:39,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:39,091 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 758 transitions. [2023-11-26 11:48:39,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-11-26 11:48:39,091 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 758 transitions. [2023-11-26 11:48:39,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-26 11:48:39,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:39,097 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] [2023-11-26 11:48:39,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:39,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:48:39,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:39,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:39,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1332667573, now seen corresponding path program 1 times [2023-11-26 11:48:39,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:39,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427788395] [2023-11-26 11:48:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:39,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:39,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:39,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427788395] [2023-11-26 11:48:39,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:48:39,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847384678] [2023-11-26 11:48:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:39,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:39,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:39,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:39,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:48:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:39,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:48:39,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:39,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:39,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847384678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:39,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:39,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:48:39,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769934740] [2023-11-26 11:48:39,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:39,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:39,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:39,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:39,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:39,738 INFO L87 Difference]: Start difference. First operand 499 states and 758 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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) [2023-11-26 11:48:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:39,824 INFO L93 Difference]: Finished difference Result 1142 states and 1745 transitions. [2023-11-26 11:48:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 61 [2023-11-26 11:48:39,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:39,835 INFO L225 Difference]: With dead ends: 1142 [2023-11-26 11:48:39,836 INFO L226 Difference]: Without dead ends: 987 [2023-11-26 11:48:39,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:39,842 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 723 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:39,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1586 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2023-11-26 11:48:39,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 500. [2023-11-26 11:48:39,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 485 states have (on average 1.5195876288659793) internal successors, (737), 491 states have internal predecessors, (737), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 11:48:39,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 759 transitions. [2023-11-26 11:48:39,898 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 759 transitions. Word has length 61 [2023-11-26 11:48:39,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:39,898 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 759 transitions. [2023-11-26 11:48:39,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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) [2023-11-26 11:48:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 759 transitions. [2023-11-26 11:48:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-26 11:48:39,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:39,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:39,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:40,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:40,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:40,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:40,126 INFO L85 PathProgramCache]: Analyzing trace with hash 420334830, now seen corresponding path program 1 times [2023-11-26 11:48:40,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:40,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815211635] [2023-11-26 11:48:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:40,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:40,276 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:40,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141091293] [2023-11-26 11:48:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:40,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:40,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:40,283 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:40,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:48:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:40,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:48:40,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:40,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:40,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:40,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815211635] [2023-11-26 11:48:40,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:40,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141091293] [2023-11-26 11:48:40,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141091293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:40,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:40,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:48:40,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579923455] [2023-11-26 11:48:40,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:40,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:40,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:40,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:40,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:40,962 INFO L87 Difference]: Start difference. First operand 500 states and 759 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-26 11:48:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:41,076 INFO L93 Difference]: Finished difference Result 1019 states and 1547 transitions. [2023-11-26 11:48:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:41,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 207 [2023-11-26 11:48:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:41,081 INFO L225 Difference]: With dead ends: 1019 [2023-11-26 11:48:41,082 INFO L226 Difference]: Without dead ends: 521 [2023-11-26 11:48:41,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:41,085 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 9 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1456 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 [2023-11-26 11:48:41,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1456 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2023-11-26 11:48:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 520. [2023-11-26 11:48:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 505 states have (on average 1.499009900990099) internal successors, (757), 511 states have internal predecessors, (757), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 11:48:41,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 779 transitions. [2023-11-26 11:48:41,119 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 779 transitions. Word has length 207 [2023-11-26 11:48:41,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:41,121 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 779 transitions. [2023-11-26 11:48:41,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-26 11:48:41,122 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 779 transitions. [2023-11-26 11:48:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-26 11:48:41,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:41,129 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:41,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:41,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:41,338 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:41,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:41,339 INFO L85 PathProgramCache]: Analyzing trace with hash -66738896, now seen corresponding path program 1 times [2023-11-26 11:48:41,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:41,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140626280] [2023-11-26 11:48:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:41,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:41,438 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:41,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173145328] [2023-11-26 11:48:41,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:41,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:41,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:41,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:41,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:48:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:42,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:48:42,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:42,061 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:42,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:42,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140626280] [2023-11-26 11:48:42,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:42,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173145328] [2023-11-26 11:48:42,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173145328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:42,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:42,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:48:42,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320759596] [2023-11-26 11:48:42,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:42,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:42,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:42,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:42,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:42,067 INFO L87 Difference]: Start difference. First operand 520 states and 779 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-26 11:48:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:42,177 INFO L93 Difference]: Finished difference Result 1059 states and 1587 transitions. [2023-11-26 11:48:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:42,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 207 [2023-11-26 11:48:42,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:42,186 INFO L225 Difference]: With dead ends: 1059 [2023-11-26 11:48:42,187 INFO L226 Difference]: Without dead ends: 541 [2023-11-26 11:48:42,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:42,191 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 9 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1456 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 [2023-11-26 11:48:42,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1456 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2023-11-26 11:48:42,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 540. [2023-11-26 11:48:42,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 525 states have (on average 1.48) internal successors, (777), 531 states have internal predecessors, (777), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 11:48:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 799 transitions. [2023-11-26 11:48:42,227 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 799 transitions. Word has length 207 [2023-11-26 11:48:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:42,229 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 799 transitions. [2023-11-26 11:48:42,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-26 11:48:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 799 transitions. [2023-11-26 11:48:42,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-26 11:48:42,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:42,234 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:42,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:42,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:42,443 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:42,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:42,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1580624046, now seen corresponding path program 1 times [2023-11-26 11:48:42,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:42,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970767933] [2023-11-26 11:48:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:42,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:42,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:42,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354839209] [2023-11-26 11:48:42,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:42,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:42,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:42,543 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:42,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:48:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:43,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:48:43,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:48:43,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:43,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:43,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970767933] [2023-11-26 11:48:43,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:43,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354839209] [2023-11-26 11:48:43,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354839209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:43,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:43,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:48:43,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108690323] [2023-11-26 11:48:43,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:43,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:43,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:43,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:43,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:43,181 INFO L87 Difference]: Start difference. First operand 540 states and 799 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-26 11:48:43,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:43,295 INFO L93 Difference]: Finished difference Result 715 states and 1068 transitions. [2023-11-26 11:48:43,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:43,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 207 [2023-11-26 11:48:43,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:43,303 INFO L225 Difference]: With dead ends: 715 [2023-11-26 11:48:43,304 INFO L226 Difference]: Without dead ends: 561 [2023-11-26 11:48:43,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:43,305 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 9 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1456 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 [2023-11-26 11:48:43,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1456 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:43,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-11-26 11:48:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 560. [2023-11-26 11:48:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 545 states have (on average 1.4623853211009175) internal successors, (797), 551 states have internal predecessors, (797), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 11:48:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 819 transitions. [2023-11-26 11:48:43,335 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 819 transitions. Word has length 207 [2023-11-26 11:48:43,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:43,338 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 819 transitions. [2023-11-26 11:48:43,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-26 11:48:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 819 transitions. [2023-11-26 11:48:43,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-26 11:48:43,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:43,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:43,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:43,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:43,554 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:43,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1885445298, now seen corresponding path program 1 times [2023-11-26 11:48:43,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:43,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669916866] [2023-11-26 11:48:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:43,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:43,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:43,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869219902] [2023-11-26 11:48:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:43,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:43,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:43,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:43,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:48:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:44,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:48:44,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:44,266 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:44,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:44,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669916866] [2023-11-26 11:48:44,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:44,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869219902] [2023-11-26 11:48:44,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869219902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:44,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:44,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:44,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343059635] [2023-11-26 11:48:44,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:44,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:44,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:44,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:44,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:44,271 INFO L87 Difference]: Start difference. First operand 560 states and 819 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2023-11-26 11:48:44,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:44,423 INFO L93 Difference]: Finished difference Result 1105 states and 1623 transitions. [2023-11-26 11:48:44,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:44,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 207 [2023-11-26 11:48:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:44,428 INFO L225 Difference]: With dead ends: 1105 [2023-11-26 11:48:44,428 INFO L226 Difference]: Without dead ends: 547 [2023-11-26 11:48:44,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:44,430 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 165 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 2032 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 [2023-11-26 11:48:44,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 2032 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:44,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-11-26 11:48:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 546. [2023-11-26 11:48:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 531 states have (on average 1.4613935969868173) internal successors, (776), 537 states have internal predecessors, (776), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 11:48:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 798 transitions. [2023-11-26 11:48:44,452 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 798 transitions. Word has length 207 [2023-11-26 11:48:44,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:44,453 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 798 transitions. [2023-11-26 11:48:44,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2023-11-26 11:48:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 798 transitions. [2023-11-26 11:48:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-26 11:48:44,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:44,457 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:44,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:44,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:44,666 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:44,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:44,667 INFO L85 PathProgramCache]: Analyzing trace with hash -127339804, now seen corresponding path program 1 times [2023-11-26 11:48:44,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:44,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556877019] [2023-11-26 11:48:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:44,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:44,751 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:44,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824844531] [2023-11-26 11:48:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:44,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:44,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:44,753 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:44,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:48:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:45,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:48:45,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:45,378 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:45,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:45,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556877019] [2023-11-26 11:48:45,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:45,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824844531] [2023-11-26 11:48:45,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824844531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:45,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:45,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:45,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940676047] [2023-11-26 11:48:45,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:45,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:45,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:45,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:45,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:45,385 INFO L87 Difference]: Start difference. First operand 546 states and 798 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2023-11-26 11:48:45,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:45,502 INFO L93 Difference]: Finished difference Result 1077 states and 1581 transitions. [2023-11-26 11:48:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:45,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 207 [2023-11-26 11:48:45,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:45,507 INFO L225 Difference]: With dead ends: 1077 [2023-11-26 11:48:45,507 INFO L226 Difference]: Without dead ends: 533 [2023-11-26 11:48:45,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:45,510 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 165 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 2011 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 [2023-11-26 11:48:45,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 2011 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:45,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-11-26 11:48:45,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 532. [2023-11-26 11:48:45,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.460348162475822) internal successors, (755), 523 states have internal predecessors, (755), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 11:48:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 777 transitions. [2023-11-26 11:48:45,531 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 777 transitions. Word has length 207 [2023-11-26 11:48:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:45,531 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 777 transitions. [2023-11-26 11:48:45,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2023-11-26 11:48:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 777 transitions. [2023-11-26 11:48:45,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-26 11:48:45,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:45,536 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:45,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:45,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:45,745 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:45,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:45,746 INFO L85 PathProgramCache]: Analyzing trace with hash -993804046, now seen corresponding path program 1 times [2023-11-26 11:48:45,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:45,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454315221] [2023-11-26 11:48:45,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:45,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:45,865 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:45,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897230549] [2023-11-26 11:48:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:45,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:45,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:45,867 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:45,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:48:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:46,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:48:46,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:48:46,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:46,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:46,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454315221] [2023-11-26 11:48:46,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:46,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897230549] [2023-11-26 11:48:46,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897230549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:46,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:46,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:46,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059515159] [2023-11-26 11:48:46,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:46,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:46,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:46,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:46,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:46,516 INFO L87 Difference]: Start difference. First operand 532 states and 777 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2023-11-26 11:48:46,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:46,623 INFO L93 Difference]: Finished difference Result 693 states and 1022 transitions. [2023-11-26 11:48:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:46,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 207 [2023-11-26 11:48:46,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:46,628 INFO L225 Difference]: With dead ends: 693 [2023-11-26 11:48:46,629 INFO L226 Difference]: Without dead ends: 519 [2023-11-26 11:48:46,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:46,630 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 165 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1990 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 [2023-11-26 11:48:46,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1990 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-11-26 11:48:46,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 518. [2023-11-26 11:48:46,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 503 states have (on average 1.459244532803181) internal successors, (734), 509 states have internal predecessors, (734), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 11:48:46,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 756 transitions. [2023-11-26 11:48:46,649 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 756 transitions. Word has length 207 [2023-11-26 11:48:46,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:46,650 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 756 transitions. [2023-11-26 11:48:46,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2023-11-26 11:48:46,651 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 756 transitions. [2023-11-26 11:48:46,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-26 11:48:46,654 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:46,654 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:46,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-26 11:48:46,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:48:46,863 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:46,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:46,864 INFO L85 PathProgramCache]: Analyzing trace with hash 757841828, now seen corresponding path program 1 times [2023-11-26 11:48:46,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:46,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883592132] [2023-11-26 11:48:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:46,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:46,949 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:46,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355139389] [2023-11-26 11:48:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:46,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:46,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:46,951 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:46,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:48:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:47,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:48:47,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:47,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:48,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:48,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883592132] [2023-11-26 11:48:48,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:48,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355139389] [2023-11-26 11:48:48,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355139389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:48,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:48:48,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-26 11:48:48,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437915923] [2023-11-26 11:48:48,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:48,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:48:48,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:48,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:48:48,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:48:48,130 INFO L87 Difference]: Start difference. First operand 518 states and 756 transitions. Second operand has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 5 states have internal predecessors, (355), 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) [2023-11-26 11:48:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:48,363 INFO L93 Difference]: Finished difference Result 2043 states and 2997 transitions. [2023-11-26 11:48:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:48:48,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 5 states have internal predecessors, (355), 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 207 [2023-11-26 11:48:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:48,376 INFO L225 Difference]: With dead ends: 2043 [2023-11-26 11:48:48,376 INFO L226 Difference]: Without dead ends: 1882 [2023-11-26 11:48:48,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:48:48,378 INFO L413 NwaCegarLoop]: 868 mSDtfsCounter, 3071 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3110 SdHoareTripleChecker+Valid, 3049 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:48,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3110 Valid, 3049 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:48,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2023-11-26 11:48:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1574. [2023-11-26 11:48:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1541 states have (on average 1.4497079818299805) internal successors, (2234), 1547 states have internal predecessors, (2234), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-26 11:48:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 2292 transitions. [2023-11-26 11:48:48,442 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 2292 transitions. Word has length 207 [2023-11-26 11:48:48,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:48,443 INFO L495 AbstractCegarLoop]: Abstraction has 1574 states and 2292 transitions. [2023-11-26 11:48:48,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 5 states have internal predecessors, (355), 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) [2023-11-26 11:48:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 2292 transitions. [2023-11-26 11:48:48,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-26 11:48:48,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:48,463 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:48,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:48,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 11:48:48,672 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:48,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:48,673 INFO L85 PathProgramCache]: Analyzing trace with hash 988259341, now seen corresponding path program 2 times [2023-11-26 11:48:48,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:48,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238885535] [2023-11-26 11:48:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:48,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:48,993 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:48,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696675035] [2023-11-26 11:48:48,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:48:48,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:48,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:48,996 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:49,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:48:49,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:48:49,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:49,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:48:49,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2023-11-26 11:48:50,165 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:50,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:50,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238885535] [2023-11-26 11:48:50,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:50,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696675035] [2023-11-26 11:48:50,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696675035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:50,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:50,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:48:50,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359462651] [2023-11-26 11:48:50,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:50,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:48:50,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:50,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:48:50,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:48:50,169 INFO L87 Difference]: Start difference. First operand 1574 states and 2292 transitions. Second operand has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 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) [2023-11-26 11:48:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:50,622 INFO L93 Difference]: Finished difference Result 1774 states and 2580 transitions. [2023-11-26 11:48:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:48:50,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 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 645 [2023-11-26 11:48:50,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:50,635 INFO L225 Difference]: With dead ends: 1774 [2023-11-26 11:48:50,635 INFO L226 Difference]: Without dead ends: 1614 [2023-11-26 11:48:50,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:48:50,637 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 12 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:50,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2612 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:48:50,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2023-11-26 11:48:50,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1611. [2023-11-26 11:48:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1578 states have (on average 1.443599493029151) internal successors, (2278), 1584 states have internal predecessors, (2278), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-26 11:48:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2336 transitions. [2023-11-26 11:48:50,696 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2336 transitions. Word has length 645 [2023-11-26 11:48:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:50,697 INFO L495 AbstractCegarLoop]: Abstraction has 1611 states and 2336 transitions. [2023-11-26 11:48:50,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 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) [2023-11-26 11:48:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2336 transitions. [2023-11-26 11:48:50,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2023-11-26 11:48:50,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:50,717 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:50,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:50,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:48:50,925 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:50,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:50,926 INFO L85 PathProgramCache]: Analyzing trace with hash -672094990, now seen corresponding path program 1 times [2023-11-26 11:48:50,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:50,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319014930] [2023-11-26 11:48:50,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:50,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:51,196 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:51,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088445012] [2023-11-26 11:48:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:51,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:51,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:51,200 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:51,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:48:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:52,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 2902 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:48:52,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:53,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:54,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:54,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319014930] [2023-11-26 11:48:54,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:54,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088445012] [2023-11-26 11:48:54,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088445012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:54,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:48:54,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-26 11:48:54,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737350912] [2023-11-26 11:48:54,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:54,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:48:54,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:54,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:48:54,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:48:54,495 INFO L87 Difference]: Start difference. First operand 1611 states and 2336 transitions. Second operand has 12 states, 12 states have (on average 102.66666666666667) internal successors, (1232), 11 states have internal predecessors, (1232), 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) [2023-11-26 11:48:55,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:55,272 INFO L93 Difference]: Finished difference Result 4876 states and 7076 transitions. [2023-11-26 11:48:55,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:48:55,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 102.66666666666667) internal successors, (1232), 11 states have internal predecessors, (1232), 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 646 [2023-11-26 11:48:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:55,300 INFO L225 Difference]: With dead ends: 4876 [2023-11-26 11:48:55,301 INFO L226 Difference]: Without dead ends: 4678 [2023-11-26 11:48:55,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1290 GetRequests, 1280 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:48:55,304 INFO L413 NwaCegarLoop]: 914 mSDtfsCounter, 10286 mSDsluCounter, 5954 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10376 SdHoareTripleChecker+Valid, 6868 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:55,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10376 Valid, 6868 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:48:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2023-11-26 11:48:55,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 3723. [2023-11-26 11:48:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 3654 states have (on average 1.4444444444444444) internal successors, (5278), 3660 states have internal predecessors, (5278), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-26 11:48:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 5408 transitions. [2023-11-26 11:48:55,432 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 5408 transitions. Word has length 646 [2023-11-26 11:48:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:55,433 INFO L495 AbstractCegarLoop]: Abstraction has 3723 states and 5408 transitions. [2023-11-26 11:48:55,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 102.66666666666667) internal successors, (1232), 11 states have internal predecessors, (1232), 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) [2023-11-26 11:48:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 5408 transitions. [2023-11-26 11:48:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1523 [2023-11-26 11:48:55,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:55,462 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:55,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:55,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:48:55,671 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:55,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:55,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1899706208, now seen corresponding path program 2 times [2023-11-26 11:48:55,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:55,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364789331] [2023-11-26 11:48:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:55,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:56,336 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:56,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976626384] [2023-11-26 11:48:56,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:48:56,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:56,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:56,338 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:56,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:48:57,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:48:57,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:57,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:48:58,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6580 trivial. 0 not checked. [2023-11-26 11:48:58,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:58,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:58,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364789331] [2023-11-26 11:48:58,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:58,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976626384] [2023-11-26 11:48:58,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976626384] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:58,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:58,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:48:58,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142438594] [2023-11-26 11:48:58,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:58,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:48:58,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:58,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:48:58,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:48:58,282 INFO L87 Difference]: Start difference. First operand 3723 states and 5408 transitions. Second operand has 7 states, 7 states have (on average 29.714285714285715) internal successors, (208), 7 states have internal predecessors, (208), 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) [2023-11-26 11:48:58,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:58,978 INFO L93 Difference]: Finished difference Result 3931 states and 5707 transitions. [2023-11-26 11:48:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:48:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.714285714285715) internal successors, (208), 7 states have internal predecessors, (208), 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 1522 [2023-11-26 11:48:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:59,018 INFO L225 Difference]: With dead ends: 3931 [2023-11-26 11:48:59,019 INFO L226 Difference]: Without dead ends: 3734 [2023-11-26 11:48:59,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1516 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:48:59,021 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 17 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3759 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:59,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3759 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:48:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3734 states. [2023-11-26 11:48:59,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3734 to 3731. [2023-11-26 11:48:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 3662 states have (on average 1.4445658110322228) internal successors, (5290), 3668 states have internal predecessors, (5290), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-26 11:48:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5420 transitions. [2023-11-26 11:48:59,145 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5420 transitions. Word has length 1522 [2023-11-26 11:48:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:59,148 INFO L495 AbstractCegarLoop]: Abstraction has 3731 states and 5420 transitions. [2023-11-26 11:48:59,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.714285714285715) internal successors, (208), 7 states have internal predecessors, (208), 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) [2023-11-26 11:48:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5420 transitions. [2023-11-26 11:48:59,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1524 [2023-11-26 11:48:59,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:59,178 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:59,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:59,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:48:59,388 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:59,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:59,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1071662230, now seen corresponding path program 1 times [2023-11-26 11:48:59,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:59,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940250645] [2023-11-26 11:48:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:59,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:00,157 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:00,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220994181] [2023-11-26 11:49:00,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:00,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:00,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:00,159 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:00,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:49:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:03,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 6959 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:49:03,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 6084 trivial. 0 not checked. [2023-11-26 11:49:03,730 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:03,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:03,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940250645] [2023-11-26 11:49:03,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:03,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220994181] [2023-11-26 11:49:03,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220994181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:03,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:03,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:49:03,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523119710] [2023-11-26 11:49:03,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:03,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:03,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:03,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:03,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:03,736 INFO L87 Difference]: Start difference. First operand 3731 states and 5420 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 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) [2023-11-26 11:49:03,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:03,893 INFO L93 Difference]: Finished difference Result 7332 states and 10648 transitions. [2023-11-26 11:49:03,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:03,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 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 1523 [2023-11-26 11:49:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:03,915 INFO L225 Difference]: With dead ends: 7332 [2023-11-26 11:49:03,915 INFO L226 Difference]: Without dead ends: 3729 [2023-11-26 11:49:03,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1521 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:03,922 INFO L413 NwaCegarLoop]: 733 mSDtfsCounter, 123 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:03,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1452 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:49:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2023-11-26 11:49:04,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3729. [2023-11-26 11:49:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 3660 states have (on average 1.444535519125683) internal successors, (5287), 3666 states have internal predecessors, (5287), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-26 11:49:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 5417 transitions. [2023-11-26 11:49:04,033 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 5417 transitions. Word has length 1523 [2023-11-26 11:49:04,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:04,033 INFO L495 AbstractCegarLoop]: Abstraction has 3729 states and 5417 transitions. [2023-11-26 11:49:04,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 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) [2023-11-26 11:49:04,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 5417 transitions. [2023-11-26 11:49:04,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1537 [2023-11-26 11:49:04,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:04,092 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2023-11-26 11:49:04,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:04,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:49:04,319 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:04,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:04,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1011579099, now seen corresponding path program 1 times [2023-11-26 11:49:04,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:04,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347745937] [2023-11-26 11:49:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:04,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:05,009 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:05,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318806629] [2023-11-26 11:49:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:05,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:05,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:05,011 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:05,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:49:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:08,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 7106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:49:08,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6565 backedges. 1117 proven. 0 refuted. 0 times theorem prover too weak. 5448 trivial. 0 not checked. [2023-11-26 11:49:09,049 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:09,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:09,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347745937] [2023-11-26 11:49:09,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:09,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318806629] [2023-11-26 11:49:09,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318806629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:09,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:09,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:09,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106430252] [2023-11-26 11:49:09,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:09,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:09,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:09,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:09,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:09,056 INFO L87 Difference]: Start difference. First operand 3729 states and 5417 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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) [2023-11-26 11:49:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:09,218 INFO L93 Difference]: Finished difference Result 7335 states and 10651 transitions. [2023-11-26 11:49:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:09,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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 1536 [2023-11-26 11:49:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:09,242 INFO L225 Difference]: With dead ends: 7335 [2023-11-26 11:49:09,242 INFO L226 Difference]: Without dead ends: 3906 [2023-11-26 11:49:09,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1535 GetRequests, 1534 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:09,250 INFO L413 NwaCegarLoop]: 903 mSDtfsCounter, 472 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 1616 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 [2023-11-26 11:49:09,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 1616 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:49:09,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3906 states. [2023-11-26 11:49:09,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3906 to 3904. [2023-11-26 11:49:09,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3904 states, 3830 states have (on average 1.4443864229765013) internal successors, (5532), 3841 states have internal predecessors, (5532), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 62 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-26 11:49:09,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 5672 transitions. [2023-11-26 11:49:09,395 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 5672 transitions. Word has length 1536 [2023-11-26 11:49:09,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:09,398 INFO L495 AbstractCegarLoop]: Abstraction has 3904 states and 5672 transitions. [2023-11-26 11:49:09,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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) [2023-11-26 11:49:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 5672 transitions. [2023-11-26 11:49:09,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1550 [2023-11-26 11:49:09,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:09,493 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:09,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:09,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:49:09,707 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:09,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:09,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1182102016, now seen corresponding path program 1 times [2023-11-26 11:49:09,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:09,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895990493] [2023-11-26 11:49:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:09,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:10,284 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:10,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868139657] [2023-11-26 11:49:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:10,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:10,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:10,294 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:10,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab32184-ac39-4947-aa05-f7481b1bdb0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:49:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:13,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 7253 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:49:13,944 INFO L285 TraceCheckSpWp]: Computing forward predicates...