./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-38.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/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_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-38.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/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_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/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 69a106a7fe4e968f8159960741f93feca1d4d684a8ecc183635291d7b7b9ab5b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:55:34,391 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:55:34,462 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:55:34,466 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:55:34,467 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:55:34,491 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:55:34,492 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:55:34,493 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:55:34,494 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:55:34,494 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:55:34,495 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:55:34,496 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:55:34,497 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:55:34,497 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:55:34,498 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:55:34,498 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:55:34,499 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:55:34,500 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:55:34,500 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:55:34,501 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:55:34,501 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:55:34,502 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:55:34,502 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:55:34,503 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:55:34,503 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:55:34,504 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:55:34,504 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:55:34,505 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:55:34,505 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:55:34,506 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:55:34,506 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:55:34,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:34,507 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:55:34,507 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:55:34,508 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:55:34,508 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:55:34,508 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:55:34,508 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:55:34,509 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:55:34,509 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:55:34,509 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:55:34,510 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:55:34,510 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_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69a106a7fe4e968f8159960741f93feca1d4d684a8ecc183635291d7b7b9ab5b [2023-11-26 11:55:34,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:55:34,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:55:34,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:55:34,767 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:55:34,768 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:55:34,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-38.i [2023-11-26 11:55:37,938 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:55:38,357 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:55:38,358 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-38.i [2023-11-26 11:55:38,376 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/data/0f0465678/b67069a0bd5f4ea59e886b4f79b3e452/FLAG453b4101c [2023-11-26 11:55:38,391 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/data/0f0465678/b67069a0bd5f4ea59e886b4f79b3e452 [2023-11-26 11:55:38,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:55:38,395 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:55:38,397 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:38,397 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:55:38,402 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:55:38,403 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:38" (1/1) ... [2023-11-26 11:55:38,404 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ddba833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:38, skipping insertion in model container [2023-11-26 11:55:38,405 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:38" (1/1) ... [2023-11-26 11:55:38,476 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:55:38,655 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_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-38.i[916,929] [2023-11-26 11:55:38,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:38,979 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:55:38,994 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_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-38.i[916,929] [2023-11-26 11:55:39,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:39,115 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:55:39,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:39 WrapperNode [2023-11-26 11:55:39,116 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:39,117 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:39,117 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:55:39,118 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:55:39,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:39" (1/1) ... [2023-11-26 11:55:39,157 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:39" (1/1) ... [2023-11-26 11:55:39,301 INFO L138 Inliner]: procedures = 26, calls = 122, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 858 [2023-11-26 11:55:39,301 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:39,302 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:55:39,302 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:55:39,302 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:55:39,315 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:39" (1/1) ... [2023-11-26 11:55:39,315 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:39" (1/1) ... [2023-11-26 11:55:39,341 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:39" (1/1) ... [2023-11-26 11:55:39,400 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:55:39,401 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:39" (1/1) ... [2023-11-26 11:55:39,401 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:39" (1/1) ... [2023-11-26 11:55:39,440 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:39" (1/1) ... [2023-11-26 11:55:39,449 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:39" (1/1) ... [2023-11-26 11:55:39,458 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:39" (1/1) ... [2023-11-26 11:55:39,469 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:39" (1/1) ... [2023-11-26 11:55:39,487 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:55:39,488 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:55:39,488 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:55:39,488 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:55:39,489 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:39" (1/1) ... [2023-11-26 11:55:39,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:39,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:39,534 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:55:39,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:55:39,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:55:39,600 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:55:39,601 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:55:39,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:55:39,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:55:39,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:55:39,815 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:55:39,818 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:55:41,185 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:55:41,249 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:55:41,250 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:55:41,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:41 BoogieIcfgContainer [2023-11-26 11:55:41,251 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:55:41,253 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:55:41,253 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:55:41,256 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:55:41,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:55:38" (1/3) ... [2023-11-26 11:55:41,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bc53e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:41, skipping insertion in model container [2023-11-26 11:55:41,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:39" (2/3) ... [2023-11-26 11:55:41,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bc53e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:41, skipping insertion in model container [2023-11-26 11:55:41,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:41" (3/3) ... [2023-11-26 11:55:41,260 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-38.i [2023-11-26 11:55:41,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:55:41,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:55:41,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:55:41,350 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;@7dbd544a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:55:41,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:55:41,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 335 states, 223 states have (on average 1.6322869955156951) internal successors, (364), 224 states have internal predecessors, (364), 109 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-26 11:55:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2023-11-26 11:55:41,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:41,398 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:55:41,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:41,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:41,404 INFO L85 PathProgramCache]: Analyzing trace with hash 459238871, now seen corresponding path program 1 times [2023-11-26 11:55:41,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:41,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795795269] [2023-11-26 11:55:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:41,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:41,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:41,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795795269] [2023-11-26 11:55:41,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:55:41,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071005417] [2023-11-26 11:55:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:41,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:41,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:41,920 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:41,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:55:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:42,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 1572 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:55:42,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 23328 trivial. 0 not checked. [2023-11-26 11:55:42,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:42,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071005417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:42,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:42,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:55:42,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440224435] [2023-11-26 11:55:42,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:42,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:55:42,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:42,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:55:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:55:42,629 INFO L87 Difference]: Start difference. First operand has 335 states, 223 states have (on average 1.6322869955156951) internal successors, (364), 224 states have internal predecessors, (364), 109 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) Second operand has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 2 states have call successors, (109), 2 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 2 states have call successors, (109) [2023-11-26 11:55:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:42,723 INFO L93 Difference]: Finished difference Result 667 states and 1271 transitions. [2023-11-26 11:55:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:55:42,726 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 2 states have call successors, (109), 2 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 2 states have call successors, (109) Word has length 693 [2023-11-26 11:55:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:42,739 INFO L225 Difference]: With dead ends: 667 [2023-11-26 11:55:42,739 INFO L226 Difference]: Without dead ends: 333 [2023-11-26 11:55:42,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 692 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 11:55:42,751 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:42,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 573 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:55:42,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-26 11:55:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2023-11-26 11:55:42,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 222 states have (on average 1.6126126126126126) internal successors, (358), 222 states have internal predecessors, (358), 109 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-26 11:55:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 576 transitions. [2023-11-26 11:55:42,930 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 576 transitions. Word has length 693 [2023-11-26 11:55:42,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:42,933 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 576 transitions. [2023-11-26 11:55:42,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 2 states have call successors, (109), 2 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 2 states have call successors, (109) [2023-11-26 11:55:42,934 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 576 transitions. [2023-11-26 11:55:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2023-11-26 11:55:42,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:42,979 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:55:42,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:55:43,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:55:43,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:43,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:43,189 INFO L85 PathProgramCache]: Analyzing trace with hash 286689993, now seen corresponding path program 1 times [2023-11-26 11:55:43,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:43,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990698279] [2023-11-26 11:55:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:43,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:43,379 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:43,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808792048] [2023-11-26 11:55:43,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:43,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:43,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:43,385 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:43,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:55:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:43,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 1572 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:55:43,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-26 11:55:44,144 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:44,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:44,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990698279] [2023-11-26 11:55:44,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:44,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808792048] [2023-11-26 11:55:44,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808792048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:44,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:44,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:44,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473444502] [2023-11-26 11:55:44,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:44,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:55:44,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:44,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:55:44,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:44,156 INFO L87 Difference]: Start difference. First operand 333 states and 576 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:55:44,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:44,326 INFO L93 Difference]: Finished difference Result 997 states and 1726 transitions. [2023-11-26 11:55:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:55:44,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 693 [2023-11-26 11:55:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:44,344 INFO L225 Difference]: With dead ends: 997 [2023-11-26 11:55:44,344 INFO L226 Difference]: Without dead ends: 665 [2023-11-26 11:55:44,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 691 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 11:55:44,355 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 525 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:44,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 1128 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:55:44,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2023-11-26 11:55:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663. [2023-11-26 11:55:44,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 442 states have (on average 1.6108597285067874) internal successors, (712), 442 states have internal predecessors, (712), 218 states have call successors, (218), 2 states have call predecessors, (218), 2 states have return successors, (218), 218 states have call predecessors, (218), 218 states have call successors, (218) [2023-11-26 11:55:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1148 transitions. [2023-11-26 11:55:44,540 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1148 transitions. Word has length 693 [2023-11-26 11:55:44,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:44,543 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 1148 transitions. [2023-11-26 11:55:44,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:55:44,544 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1148 transitions. [2023-11-26 11:55:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2023-11-26 11:55:44,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:44,568 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:55:44,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:44,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:44,777 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:44,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:44,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1672893387, now seen corresponding path program 1 times [2023-11-26 11:55:44,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:44,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245283360] [2023-11-26 11:55:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:44,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:44,924 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:44,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487357941] [2023-11-26 11:55:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:44,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:44,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:44,929 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:44,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:55:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:45,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 1570 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:55:45,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 11538 proven. 189 refuted. 0 times theorem prover too weak. 11817 trivial. 0 not checked. [2023-11-26 11:55:46,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 135 proven. 189 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-26 11:55:46,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:46,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245283360] [2023-11-26 11:55:46,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:46,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487357941] [2023-11-26 11:55:46,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487357941] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:46,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:55:46,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:55:46,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558292932] [2023-11-26 11:55:46,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:46,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:55:46,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:46,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:55:46,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:55:46,944 INFO L87 Difference]: Start difference. First operand 663 states and 1148 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (172), 2 states have call predecessors, (172), 4 states have return successors, (173), 2 states have call predecessors, (173), 2 states have call successors, (173) [2023-11-26 11:55:47,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:47,865 INFO L93 Difference]: Finished difference Result 1339 states and 2305 transitions. [2023-11-26 11:55:47,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:55:47,866 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (172), 2 states have call predecessors, (172), 4 states have return successors, (173), 2 states have call predecessors, (173), 2 states have call successors, (173) Word has length 693 [2023-11-26 11:55:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:47,874 INFO L225 Difference]: With dead ends: 1339 [2023-11-26 11:55:47,875 INFO L226 Difference]: Without dead ends: 677 [2023-11-26 11:55:47,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1388 GetRequests, 1378 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:55:47,879 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 886 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:47,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 1120 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 11:55:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2023-11-26 11:55:48,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 669. [2023-11-26 11:55:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 446 states have (on average 1.5874439461883407) internal successors, (708), 446 states have internal predecessors, (708), 218 states have call successors, (218), 4 states have call predecessors, (218), 4 states have return successors, (218), 218 states have call predecessors, (218), 218 states have call successors, (218) [2023-11-26 11:55:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1144 transitions. [2023-11-26 11:55:48,038 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1144 transitions. Word has length 693 [2023-11-26 11:55:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:48,040 INFO L495 AbstractCegarLoop]: Abstraction has 669 states and 1144 transitions. [2023-11-26 11:55:48,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (172), 2 states have call predecessors, (172), 4 states have return successors, (173), 2 states have call predecessors, (173), 2 states have call successors, (173) [2023-11-26 11:55:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1144 transitions. [2023-11-26 11:55:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2023-11-26 11:55:48,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:48,050 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:55:48,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:48,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:48,260 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:48,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:48,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1083733879, now seen corresponding path program 1 times [2023-11-26 11:55:48,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:48,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101914534] [2023-11-26 11:55:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:48,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:48,357 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:48,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514887029] [2023-11-26 11:55:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:48,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:48,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:48,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:48,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:55:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:48,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:55:48,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 11374 proven. 195 refuted. 0 times theorem prover too weak. 11975 trivial. 0 not checked. [2023-11-26 11:55:49,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 129 proven. 195 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-26 11:55:50,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:50,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101914534] [2023-11-26 11:55:50,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:50,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514887029] [2023-11-26 11:55:50,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514887029] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:50,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:55:50,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:55:50,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654208127] [2023-11-26 11:55:50,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:50,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:55:50,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:50,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:55:50,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:55:50,314 INFO L87 Difference]: Start difference. First operand 669 states and 1144 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (174), 2 states have call predecessors, (174), 4 states have return successors, (175), 2 states have call predecessors, (175), 2 states have call successors, (175) [2023-11-26 11:55:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:51,095 INFO L93 Difference]: Finished difference Result 1351 states and 2293 transitions. [2023-11-26 11:55:51,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:55:51,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (174), 2 states have call predecessors, (174), 4 states have return successors, (175), 2 states have call predecessors, (175), 2 states have call successors, (175) Word has length 693 [2023-11-26 11:55:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:51,104 INFO L225 Difference]: With dead ends: 1351 [2023-11-26 11:55:51,104 INFO L226 Difference]: Without dead ends: 683 [2023-11-26 11:55:51,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1388 GetRequests, 1378 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:55:51,108 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 543 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:51,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 1094 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:55:51,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2023-11-26 11:55:51,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 671. [2023-11-26 11:55:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 446 states have (on average 1.5515695067264574) internal successors, (692), 446 states have internal predecessors, (692), 218 states have call successors, (218), 6 states have call predecessors, (218), 6 states have return successors, (218), 218 states have call predecessors, (218), 218 states have call successors, (218) [2023-11-26 11:55:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1128 transitions. [2023-11-26 11:55:51,271 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1128 transitions. Word has length 693 [2023-11-26 11:55:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:51,273 INFO L495 AbstractCegarLoop]: Abstraction has 671 states and 1128 transitions. [2023-11-26 11:55:51,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (174), 2 states have call predecessors, (174), 4 states have return successors, (175), 2 states have call predecessors, (175), 2 states have call successors, (175) [2023-11-26 11:55:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1128 transitions. [2023-11-26 11:55:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2023-11-26 11:55:51,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:51,282 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:55:51,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:51,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-26 11:55:51,492 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:51,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:51,493 INFO L85 PathProgramCache]: Analyzing trace with hash -214362640, now seen corresponding path program 1 times [2023-11-26 11:55:51,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:51,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074079329] [2023-11-26 11:55:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:51,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:51,609 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:51,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147852280] [2023-11-26 11:55:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:51,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:51,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:51,611 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:51,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:55:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:52,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:55:52,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-26 11:55:52,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:52,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:52,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074079329] [2023-11-26 11:55:52,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:52,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147852280] [2023-11-26 11:55:52,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147852280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:52,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:52,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:52,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405050227] [2023-11-26 11:55:52,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:52,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:55:52,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:52,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:55:52,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:52,258 INFO L87 Difference]: Start difference. First operand 671 states and 1128 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:55:52,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:52,453 INFO L93 Difference]: Finished difference Result 2011 states and 3382 transitions. [2023-11-26 11:55:52,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:55:52,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 694 [2023-11-26 11:55:52,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:52,467 INFO L225 Difference]: With dead ends: 2011 [2023-11-26 11:55:52,467 INFO L226 Difference]: Without dead ends: 1341 [2023-11-26 11:55:52,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 692 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 11:55:52,474 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 518 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:52,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1489 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:55:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2023-11-26 11:55:52,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1339. [2023-11-26 11:55:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 890 states have (on average 1.5460674157303371) internal successors, (1376), 890 states have internal predecessors, (1376), 436 states have call successors, (436), 12 states have call predecessors, (436), 12 states have return successors, (436), 436 states have call predecessors, (436), 436 states have call successors, (436) [2023-11-26 11:55:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 2248 transitions. [2023-11-26 11:55:52,771 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 2248 transitions. Word has length 694 [2023-11-26 11:55:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:52,773 INFO L495 AbstractCegarLoop]: Abstraction has 1339 states and 2248 transitions. [2023-11-26 11:55:52,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:55:52,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 2248 transitions. [2023-11-26 11:55:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2023-11-26 11:55:52,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:52,782 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:55:52,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:52,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:52,991 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:52,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1694095150, now seen corresponding path program 1 times [2023-11-26 11:55:52,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:52,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482045237] [2023-11-26 11:55:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:52,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:53,083 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:53,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251266344] [2023-11-26 11:55:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:53,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:53,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:53,085 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:53,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:55:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:53,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 1567 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:55:53,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-26 11:55:53,763 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:53,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:53,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482045237] [2023-11-26 11:55:53,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:53,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251266344] [2023-11-26 11:55:53,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251266344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:53,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:53,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:55:53,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123847803] [2023-11-26 11:55:53,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:53,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:55:53,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:53,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:55:53,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:55:53,767 INFO L87 Difference]: Start difference. First operand 1339 states and 2248 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:55:53,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:53,966 INFO L93 Difference]: Finished difference Result 2937 states and 4975 transitions. [2023-11-26 11:55:53,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:55:53,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 694 [2023-11-26 11:55:53,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:53,978 INFO L225 Difference]: With dead ends: 2937 [2023-11-26 11:55:53,979 INFO L226 Difference]: Without dead ends: 1339 [2023-11-26 11:55:53,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 691 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:55:53,985 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 86 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:53,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1636 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:55:53,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2023-11-26 11:55:54,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1339. [2023-11-26 11:55:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 890 states have (on average 1.5415730337078652) internal successors, (1372), 890 states have internal predecessors, (1372), 436 states have call successors, (436), 12 states have call predecessors, (436), 12 states have return successors, (436), 436 states have call predecessors, (436), 436 states have call successors, (436) [2023-11-26 11:55:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 2244 transitions. [2023-11-26 11:55:54,277 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 2244 transitions. Word has length 694 [2023-11-26 11:55:54,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:54,278 INFO L495 AbstractCegarLoop]: Abstraction has 1339 states and 2244 transitions. [2023-11-26 11:55:54,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:55:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 2244 transitions. [2023-11-26 11:55:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2023-11-26 11:55:54,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:54,287 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:55:54,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:54,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:54,497 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:54,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:54,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1895919084, now seen corresponding path program 1 times [2023-11-26 11:55:54,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:54,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252826305] [2023-11-26 11:55:54,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:54,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:54,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:54,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074035682] [2023-11-26 11:55:54,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:54,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:54,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:54,604 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:54,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:55:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:55,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 1568 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:55:55,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-26 11:55:55,298 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:55,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:55,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252826305] [2023-11-26 11:55:55,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:55,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074035682] [2023-11-26 11:55:55,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074035682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:55,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:55,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:55:55,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564114424] [2023-11-26 11:55:55,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:55,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:55:55,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:55,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:55:55,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:55:55,304 INFO L87 Difference]: Start difference. First operand 1339 states and 2244 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 2 states have return successors, (109), 2 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:55:56,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:56,062 INFO L93 Difference]: Finished difference Result 2725 states and 4531 transitions. [2023-11-26 11:55:56,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:55:56,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 2 states have return successors, (109), 2 states have call predecessors, (109), 1 states have call successors, (109) Word has length 694 [2023-11-26 11:55:56,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:56,077 INFO L225 Difference]: With dead ends: 2725 [2023-11-26 11:55:56,077 INFO L226 Difference]: Without dead ends: 1387 [2023-11-26 11:55:56,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 690 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:55:56,084 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 394 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:56,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 1103 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:55:56,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2023-11-26 11:55:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1355. [2023-11-26 11:55:56,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 902 states have (on average 1.5254988913525498) internal successors, (1376), 902 states have internal predecessors, (1376), 436 states have call successors, (436), 16 states have call predecessors, (436), 16 states have return successors, (436), 436 states have call predecessors, (436), 436 states have call successors, (436) [2023-11-26 11:55:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 2248 transitions. [2023-11-26 11:55:56,410 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 2248 transitions. Word has length 694 [2023-11-26 11:55:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:56,411 INFO L495 AbstractCegarLoop]: Abstraction has 1355 states and 2248 transitions. [2023-11-26 11:55:56,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 2 states have return successors, (109), 2 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:55:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 2248 transitions. [2023-11-26 11:55:56,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2023-11-26 11:55:56,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:56,420 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:55:56,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:56,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:56,631 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:56,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:56,631 INFO L85 PathProgramCache]: Analyzing trace with hash -53118352, now seen corresponding path program 1 times [2023-11-26 11:55:56,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:56,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852506928] [2023-11-26 11:55:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:56,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:56,726 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:56,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345040511] [2023-11-26 11:55:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:56,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:56,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:56,732 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:56,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:55:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:57,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:55:57,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-26 11:55:58,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:58,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:58,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852506928] [2023-11-26 11:55:58,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:58,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345040511] [2023-11-26 11:55:58,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345040511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:58,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:58,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:55:58,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020293573] [2023-11-26 11:55:58,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:58,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:55:58,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:58,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:55:58,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:55:58,469 INFO L87 Difference]: Start difference. First operand 1355 states and 2248 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:55:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:59,701 INFO L93 Difference]: Finished difference Result 4689 states and 7877 transitions. [2023-11-26 11:55:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:55:59,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 694 [2023-11-26 11:55:59,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:59,728 INFO L225 Difference]: With dead ends: 4689 [2023-11-26 11:55:59,728 INFO L226 Difference]: Without dead ends: 3335 [2023-11-26 11:55:59,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 690 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:55:59,736 INFO L413 NwaCegarLoop]: 1144 mSDtfsCounter, 1057 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 2334 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:59,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1057 Valid, 2334 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:55:59,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2023-11-26 11:56:00,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3099. [2023-11-26 11:56:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3099 states, 2190 states have (on average 1.5753424657534247) internal successors, (3450), 2190 states have internal predecessors, (3450), 872 states have call successors, (872), 36 states have call predecessors, (872), 36 states have return successors, (872), 872 states have call predecessors, (872), 872 states have call successors, (872) [2023-11-26 11:56:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 5194 transitions. [2023-11-26 11:56:00,387 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 5194 transitions. Word has length 694 [2023-11-26 11:56:00,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:00,389 INFO L495 AbstractCegarLoop]: Abstraction has 3099 states and 5194 transitions. [2023-11-26 11:56:00,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:56:00,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 5194 transitions. [2023-11-26 11:56:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2023-11-26 11:56:00,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:00,398 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:56:00,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:00,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:00,608 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:00,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:00,609 INFO L85 PathProgramCache]: Analyzing trace with hash 8921262, now seen corresponding path program 1 times [2023-11-26 11:56:00,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:00,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981964902] [2023-11-26 11:56:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:00,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:00,686 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:00,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707211730] [2023-11-26 11:56:00,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:00,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:00,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:00,688 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:00,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:56:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:01,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 1567 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:56:01,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 11124 proven. 120 refuted. 0 times theorem prover too weak. 12300 trivial. 0 not checked. [2023-11-26 11:56:01,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 204 proven. 120 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-26 11:56:02,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:02,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981964902] [2023-11-26 11:56:02,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:02,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707211730] [2023-11-26 11:56:02,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707211730] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:02,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:02,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2023-11-26 11:56:02,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489117794] [2023-11-26 11:56:02,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:02,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:56:02,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:02,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:56:02,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:56:02,407 INFO L87 Difference]: Start difference. First operand 3099 states and 5194 transitions. Second operand has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 3 states have call successors, (149), 2 states have call predecessors, (149), 4 states have return successors, (150), 3 states have call predecessors, (150), 3 states have call successors, (150) [2023-11-26 11:56:04,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:04,268 INFO L93 Difference]: Finished difference Result 7903 states and 13137 transitions. [2023-11-26 11:56:04,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 11:56:04,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 3 states have call successors, (149), 2 states have call predecessors, (149), 4 states have return successors, (150), 3 states have call predecessors, (150), 3 states have call successors, (150) Word has length 694 [2023-11-26 11:56:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:04,309 INFO L225 Difference]: With dead ends: 7903 [2023-11-26 11:56:04,309 INFO L226 Difference]: Without dead ends: 4805 [2023-11-26 11:56:04,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1399 GetRequests, 1379 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:56:04,325 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 856 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 2261 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:04,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [925 Valid, 2261 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 11:56:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4805 states. [2023-11-26 11:56:05,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4805 to 4695. [2023-11-26 11:56:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 3320 states have (on average 1.5647590361445782) internal successors, (5195), 3320 states have internal predecessors, (5195), 1308 states have call successors, (1308), 66 states have call predecessors, (1308), 66 states have return successors, (1308), 1308 states have call predecessors, (1308), 1308 states have call successors, (1308) [2023-11-26 11:56:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 7811 transitions. [2023-11-26 11:56:05,372 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 7811 transitions. Word has length 694 [2023-11-26 11:56:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:05,373 INFO L495 AbstractCegarLoop]: Abstraction has 4695 states and 7811 transitions. [2023-11-26 11:56:05,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 3 states have call successors, (149), 2 states have call predecessors, (149), 4 states have return successors, (150), 3 states have call predecessors, (150), 3 states have call successors, (150) [2023-11-26 11:56:05,375 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 7811 transitions. [2023-11-26 11:56:05,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2023-11-26 11:56:05,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:05,384 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:56:05,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:05,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:05,594 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:05,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash 930751102, now seen corresponding path program 1 times [2023-11-26 11:56:05,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:05,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509157730] [2023-11-26 11:56:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:05,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:05,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:05,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215975771] [2023-11-26 11:56:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:05,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:05,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:05,682 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:05,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:56:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:06,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 1572 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:56:06,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 14304 proven. 300 refuted. 0 times theorem prover too weak. 8940 trivial. 0 not checked. [2023-11-26 11:56:07,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 342 proven. 303 refuted. 0 times theorem prover too weak. 22899 trivial. 0 not checked. [2023-11-26 11:56:08,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:08,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509157730] [2023-11-26 11:56:08,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:08,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215975771] [2023-11-26 11:56:08,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215975771] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:08,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:08,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-11-26 11:56:08,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431325801] [2023-11-26 11:56:08,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:08,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:56:08,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:08,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:56:08,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:56:08,775 INFO L87 Difference]: Start difference. First operand 4695 states and 7811 transitions. Second operand has 20 states, 20 states have (on average 12.15) internal successors, (243), 20 states have internal predecessors, (243), 5 states have call successors, (167), 3 states have call predecessors, (167), 7 states have return successors, (168), 5 states have call predecessors, (168), 5 states have call successors, (168) [2023-11-26 11:56:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:13,839 INFO L93 Difference]: Finished difference Result 18187 states and 30445 transitions. [2023-11-26 11:56:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-26 11:56:13,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 12.15) internal successors, (243), 20 states have internal predecessors, (243), 5 states have call successors, (167), 3 states have call predecessors, (167), 7 states have return successors, (168), 5 states have call predecessors, (168), 5 states have call successors, (168) Word has length 695 [2023-11-26 11:56:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:13,938 INFO L225 Difference]: With dead ends: 18187 [2023-11-26 11:56:13,938 INFO L226 Difference]: Without dead ends: 13493 [2023-11-26 11:56:13,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1413 GetRequests, 1373 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=526, Invalid=1196, Unknown=0, NotChecked=0, Total=1722 [2023-11-26 11:56:13,957 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 2263 mSDsluCounter, 2822 mSDsCounter, 0 mSdLazyCounter, 3029 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2346 SdHoareTripleChecker+Valid, 3425 SdHoareTripleChecker+Invalid, 3677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 3029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:13,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2346 Valid, 3425 Invalid, 3677 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [648 Valid, 3029 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-26 11:56:13,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13493 states. [2023-11-26 11:56:15,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13493 to 8115. [2023-11-26 11:56:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8115 states, 6320 states have (on average 1.6289556962025316) internal successors, (10295), 6332 states have internal predecessors, (10295), 1692 states have call successors, (1692), 102 states have call predecessors, (1692), 102 states have return successors, (1692), 1680 states have call predecessors, (1692), 1692 states have call successors, (1692) [2023-11-26 11:56:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8115 states to 8115 states and 13679 transitions. [2023-11-26 11:56:15,411 INFO L78 Accepts]: Start accepts. Automaton has 8115 states and 13679 transitions. Word has length 695 [2023-11-26 11:56:15,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:15,412 INFO L495 AbstractCegarLoop]: Abstraction has 8115 states and 13679 transitions. [2023-11-26 11:56:15,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.15) internal successors, (243), 20 states have internal predecessors, (243), 5 states have call successors, (167), 3 states have call predecessors, (167), 7 states have return successors, (168), 5 states have call predecessors, (168), 5 states have call successors, (168) [2023-11-26 11:56:15,413 INFO L276 IsEmpty]: Start isEmpty. Operand 8115 states and 13679 transitions. [2023-11-26 11:56:15,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2023-11-26 11:56:15,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:15,425 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:56:15,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:15,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:15,642 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:15,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:15,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1348147708, now seen corresponding path program 1 times [2023-11-26 11:56:15,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:15,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138541219] [2023-11-26 11:56:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:15,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:15,734 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:15,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975782851] [2023-11-26 11:56:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:15,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:15,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:15,736 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:15,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b58b848-c1a2-4d52-8bde-8c507f8ace7f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:56:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:16,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 1573 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:56:16,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 16908 proven. 777 refuted. 0 times theorem prover too weak. 5859 trivial. 0 not checked. [2023-11-26 11:56:18,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 240 proven. 84 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-26 11:56:19,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:19,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138541219] [2023-11-26 11:56:19,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:19,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975782851] [2023-11-26 11:56:19,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975782851] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:19,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:19,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2023-11-26 11:56:19,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766896565] [2023-11-26 11:56:19,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:19,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:56:19,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:19,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:56:19,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:56:19,553 INFO L87 Difference]: Start difference. First operand 8115 states and 13679 transitions. Second operand has 16 states, 16 states have (on average 16.625) internal successors, (266), 16 states have internal predecessors, (266), 5 states have call successors, (182), 4 states have call predecessors, (182), 8 states have return successors, (184), 5 states have call predecessors, (184), 5 states have call successors, (184)