./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-3.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_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/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_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/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_517be96d-fc07-4ecc-bce6-a4f32ade7810/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 5435813e8a4ec120b68138e4f3d79279dd9250845bb50f86b902d431f8071ca4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:49:02,314 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:49:02,454 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:49:02,464 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:49:02,465 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:49:02,514 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:49:02,514 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:49:02,515 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:49:02,516 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:49:02,522 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:49:02,523 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:49:02,524 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:49:02,525 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:49:02,527 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:49:02,527 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:49:02,528 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:49:02,529 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:49:02,529 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:49:02,530 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:49:02,530 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:49:02,531 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:49:02,531 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:49:02,532 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:49:02,532 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:49:02,533 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:49:02,533 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:49:02,534 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:49:02,535 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:49:02,535 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:49:02,536 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:49:02,537 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:49:02,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:02,538 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:49:02,538 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:49:02,538 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:49:02,539 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:49:02,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:49:02,539 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:49:02,539 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:49:02,540 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:49:02,540 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:49:02,540 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:49:02,541 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_517be96d-fc07-4ecc-bce6-a4f32ade7810/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5435813e8a4ec120b68138e4f3d79279dd9250845bb50f86b902d431f8071ca4 [2023-11-26 10:49:02,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:49:02,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:49:02,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:49:02,903 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:49:02,904 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:49:02,906 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-3.i [2023-11-26 10:49:06,264 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:49:06,548 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:49:06,548 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-3.i [2023-11-26 10:49:06,562 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/data/c1d9bb4c9/7896fbfb86b8406591a27751be9f89b3/FLAG892b0b5e6 [2023-11-26 10:49:06,575 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/data/c1d9bb4c9/7896fbfb86b8406591a27751be9f89b3 [2023-11-26 10:49:06,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:49:06,580 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:49:06,581 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:06,581 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:49:06,587 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:49:06,588 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:06" (1/1) ... [2023-11-26 10:49:06,588 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b98bf9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:06, skipping insertion in model container [2023-11-26 10:49:06,589 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:06" (1/1) ... [2023-11-26 10:49:06,661 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:49:06,815 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_517be96d-fc07-4ecc-bce6-a4f32ade7810/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-3.i[915,928] [2023-11-26 10:49:06,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:07,025 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:49:07,038 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_517be96d-fc07-4ecc-bce6-a4f32ade7810/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-3.i[915,928] [2023-11-26 10:49:07,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:07,132 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:49:07,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07 WrapperNode [2023-11-26 10:49:07,133 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:07,134 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:07,134 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:49:07,134 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:49:07,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,181 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,270 INFO L138 Inliner]: procedures = 26, calls = 99, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 588 [2023-11-26 10:49:07,270 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:07,271 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:49:07,271 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:49:07,272 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:49:07,284 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,292 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,333 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 10:49:07,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,334 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,390 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,397 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,417 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,424 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,463 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:49:07,464 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:49:07,464 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:49:07,472 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:49:07,473 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:07,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:07,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:49:07,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:49:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:49:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:49:07,562 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:49:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:49:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:49:07,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:49:07,752 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:49:07,754 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:49:08,789 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:49:08,859 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:49:08,860 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:49:08,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:08 BoogieIcfgContainer [2023-11-26 10:49:08,862 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:49:08,865 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:49:08,865 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:49:08,869 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:49:08,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:49:06" (1/3) ... [2023-11-26 10:49:08,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112df8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:08, skipping insertion in model container [2023-11-26 10:49:08,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (2/3) ... [2023-11-26 10:49:08,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112df8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:08, skipping insertion in model container [2023-11-26 10:49:08,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:08" (3/3) ... [2023-11-26 10:49:08,875 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-3.i [2023-11-26 10:49:08,895 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:49:08,896 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:49:08,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:49:08,986 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;@2e801f25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:49:08,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:49:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 237 states, 148 states have (on average 1.5743243243243243) internal successors, (233), 149 states have internal predecessors, (233), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-26 10:49:09,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-11-26 10:49:09,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:09,034 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:09,034 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:09,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:09,041 INFO L85 PathProgramCache]: Analyzing trace with hash 136519565, now seen corresponding path program 1 times [2023-11-26 10:49:09,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:09,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202212570] [2023-11-26 10:49:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:09,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:09,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:09,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202212570] [2023-11-26 10:49:09,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:49:09,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764686242] [2023-11-26 10:49:09,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:09,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:09,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:09,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:09,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:49:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:09,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:49:10,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 14450 trivial. 0 not checked. [2023-11-26 10:49:10,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:10,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764686242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:10,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:10,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:10,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336353181] [2023-11-26 10:49:10,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:10,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:49:10,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:10,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:49:10,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:49:10,206 INFO L87 Difference]: Start difference. First operand has 237 states, 148 states have (on average 1.5743243243243243) internal successors, (233), 149 states have internal predecessors, (233), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 2 states, 2 states have (on average 53.0) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (86), 2 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-26 10:49:10,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:10,329 INFO L93 Difference]: Finished difference Result 471 states and 894 transitions. [2023-11-26 10:49:10,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:49:10,350 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 53.0) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (86), 2 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 2 states have call successors, (86) Word has length 531 [2023-11-26 10:49:10,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:10,368 INFO L225 Difference]: With dead ends: 471 [2023-11-26 10:49:10,369 INFO L226 Difference]: Without dead ends: 235 [2023-11-26 10:49:10,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 530 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 10:49:10,379 INFO L413 NwaCegarLoop]: 395 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, 395 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 10:49:10,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 395 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:10,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-11-26 10:49:10,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2023-11-26 10:49:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 147 states have (on average 1.5374149659863945) internal successors, (226), 147 states have internal predecessors, (226), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-26 10:49:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 398 transitions. [2023-11-26 10:49:10,501 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 398 transitions. Word has length 531 [2023-11-26 10:49:10,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:10,502 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 398 transitions. [2023-11-26 10:49:10,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 53.0) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (86), 2 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-26 10:49:10,503 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 398 transitions. [2023-11-26 10:49:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-11-26 10:49:10,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:10,527 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:10,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:10,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:49:10,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:10,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1987618031, now seen corresponding path program 1 times [2023-11-26 10:49:10,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:10,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100906599] [2023-11-26 10:49:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:10,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:10,860 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:10,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131593875] [2023-11-26 10:49:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:10,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:10,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:10,863 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:10,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:49:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:11,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:49:11,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 10:49:11,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:11,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:11,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100906599] [2023-11-26 10:49:11,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:11,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131593875] [2023-11-26 10:49:11,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131593875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:11,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:11,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:49:11,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055119243] [2023-11-26 10:49:11,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:11,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:11,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:11,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:11,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:11,346 INFO L87 Difference]: Start difference. First operand 235 states and 398 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 10:49:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:11,414 INFO L93 Difference]: Finished difference Result 470 states and 797 transitions. [2023-11-26 10:49:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:11,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 531 [2023-11-26 10:49:11,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:11,440 INFO L225 Difference]: With dead ends: 470 [2023-11-26 10:49:11,441 INFO L226 Difference]: Without dead ends: 236 [2023-11-26 10:49:11,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 529 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 10:49:11,451 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 0 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:11,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 783 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-11-26 10:49:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2023-11-26 10:49:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 148 states have (on average 1.5337837837837838) internal successors, (227), 148 states have internal predecessors, (227), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-26 10:49:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 399 transitions. [2023-11-26 10:49:11,526 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 399 transitions. Word has length 531 [2023-11-26 10:49:11,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:11,535 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 399 transitions. [2023-11-26 10:49:11,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 10:49:11,536 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 399 transitions. [2023-11-26 10:49:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2023-11-26 10:49:11,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:11,547 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:11,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:11,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 10:49:11,756 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:11,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:11,757 INFO L85 PathProgramCache]: Analyzing trace with hash 419158308, now seen corresponding path program 1 times [2023-11-26 10:49:11,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:11,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424197267] [2023-11-26 10:49:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:11,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:11,912 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:11,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380811392] [2023-11-26 10:49:11,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:11,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:11,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:11,921 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:11,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:49:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:12,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:49:12,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 10:49:12,357 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:12,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:12,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424197267] [2023-11-26 10:49:12,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:12,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380811392] [2023-11-26 10:49:12,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380811392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:12,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:12,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:49:12,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216117397] [2023-11-26 10:49:12,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:12,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:12,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:12,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:12,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:12,364 INFO L87 Difference]: Start difference. First operand 236 states and 399 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 10:49:12,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:12,411 INFO L93 Difference]: Finished difference Result 472 states and 799 transitions. [2023-11-26 10:49:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:12,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 532 [2023-11-26 10:49:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:12,417 INFO L225 Difference]: With dead ends: 472 [2023-11-26 10:49:12,417 INFO L226 Difference]: Without dead ends: 237 [2023-11-26 10:49:12,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 530 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 10:49:12,420 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 0 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:12,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 783 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-26 10:49:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2023-11-26 10:49:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 149 states have (on average 1.5302013422818792) internal successors, (228), 149 states have internal predecessors, (228), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-26 10:49:12,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 400 transitions. [2023-11-26 10:49:12,448 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 400 transitions. Word has length 532 [2023-11-26 10:49:12,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:12,451 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 400 transitions. [2023-11-26 10:49:12,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 10:49:12,451 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 400 transitions. [2023-11-26 10:49:12,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2023-11-26 10:49:12,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:12,457 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:12,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:12,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:12,666 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:12,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:12,667 INFO L85 PathProgramCache]: Analyzing trace with hash 215788339, now seen corresponding path program 1 times [2023-11-26 10:49:12,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:12,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610441787] [2023-11-26 10:49:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:12,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:12,798 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:12,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518235658] [2023-11-26 10:49:12,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:12,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:12,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:12,800 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:12,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:49:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:49:13,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 6749 proven. 75 refuted. 0 times theorem prover too weak. 7796 trivial. 0 not checked. [2023-11-26 10:49:13,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 180 proven. 75 refuted. 0 times theorem prover too weak. 14365 trivial. 0 not checked. [2023-11-26 10:49:14,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:14,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610441787] [2023-11-26 10:49:14,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:14,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518235658] [2023-11-26 10:49:14,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518235658] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:14,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:14,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-26 10:49:14,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89160474] [2023-11-26 10:49:14,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:14,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:49:14,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:14,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:49:14,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:49:14,284 INFO L87 Difference]: Start difference. First operand 237 states and 400 transitions. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 5 states have call successors, (111), 3 states have call predecessors, (111), 5 states have return successors, (112), 5 states have call predecessors, (112), 5 states have call successors, (112) [2023-11-26 10:49:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:15,130 INFO L93 Difference]: Finished difference Result 483 states and 807 transitions. [2023-11-26 10:49:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:49:15,132 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 5 states have call successors, (111), 3 states have call predecessors, (111), 5 states have return successors, (112), 5 states have call predecessors, (112), 5 states have call successors, (112) Word has length 533 [2023-11-26 10:49:15,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:15,136 INFO L225 Difference]: With dead ends: 483 [2023-11-26 10:49:15,137 INFO L226 Difference]: Without dead ends: 247 [2023-11-26 10:49:15,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1070 GetRequests, 1056 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:49:15,139 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 786 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:15,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 725 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 10:49:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-26 10:49:15,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 245. [2023-11-26 10:49:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 155 states have (on average 1.4967741935483871) internal successors, (232), 155 states have internal predecessors, (232), 86 states have call successors, (86), 3 states have call predecessors, (86), 3 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-26 10:49:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 404 transitions. [2023-11-26 10:49:15,182 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 404 transitions. Word has length 533 [2023-11-26 10:49:15,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:15,184 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 404 transitions. [2023-11-26 10:49:15,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 5 states have call successors, (111), 3 states have call predecessors, (111), 5 states have return successors, (112), 5 states have call predecessors, (112), 5 states have call successors, (112) [2023-11-26 10:49:15,185 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 404 transitions. [2023-11-26 10:49:15,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2023-11-26 10:49:15,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:15,191 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:15,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:15,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:15,400 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:15,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:15,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1057936823, now seen corresponding path program 1 times [2023-11-26 10:49:15,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:15,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984702145] [2023-11-26 10:49:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:15,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:15,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:15,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294269250] [2023-11-26 10:49:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:15,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:15,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:15,487 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:15,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:49:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:15,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:49:15,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 3489 proven. 33 refuted. 0 times theorem prover too weak. 11098 trivial. 0 not checked. [2023-11-26 10:49:16,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 222 proven. 33 refuted. 0 times theorem prover too weak. 14365 trivial. 0 not checked. [2023-11-26 10:49:16,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:16,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984702145] [2023-11-26 10:49:16,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:16,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294269250] [2023-11-26 10:49:16,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294269250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:16,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:16,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:49:16,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019485801] [2023-11-26 10:49:16,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:16,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:49:16,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:16,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:49:16,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:49:16,487 INFO L87 Difference]: Start difference. First operand 245 states and 404 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 2 states have call successors, (97), 2 states have call predecessors, (97), 4 states have return successors, (98), 2 states have call predecessors, (98), 2 states have call successors, (98) [2023-11-26 10:49:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:17,056 INFO L93 Difference]: Finished difference Result 497 states and 814 transitions. [2023-11-26 10:49:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:49:17,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 2 states have call successors, (97), 2 states have call predecessors, (97), 4 states have return successors, (98), 2 states have call predecessors, (98), 2 states have call successors, (98) Word has length 533 [2023-11-26 10:49:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:17,062 INFO L225 Difference]: With dead ends: 497 [2023-11-26 10:49:17,062 INFO L226 Difference]: Without dead ends: 253 [2023-11-26 10:49:17,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1068 GetRequests, 1058 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 10:49:17,064 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 266 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:17,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 731 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:49:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-11-26 10:49:17,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2023-11-26 10:49:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 86 states have call successors, (86), 4 states have call predecessors, (86), 4 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-26 10:49:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 406 transitions. [2023-11-26 10:49:17,107 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 406 transitions. Word has length 533 [2023-11-26 10:49:17,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:17,108 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 406 transitions. [2023-11-26 10:49:17,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 2 states have call successors, (97), 2 states have call predecessors, (97), 4 states have return successors, (98), 2 states have call predecessors, (98), 2 states have call successors, (98) [2023-11-26 10:49:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 406 transitions. [2023-11-26 10:49:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-11-26 10:49:17,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:17,115 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:17,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:17,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:17,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:17,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash 497456767, now seen corresponding path program 1 times [2023-11-26 10:49:17,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:17,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177293117] [2023-11-26 10:49:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:17,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:17,408 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:17,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401516506] [2023-11-26 10:49:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:17,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:17,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:17,410 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:17,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:49:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:17,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:49:17,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 10:49:17,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:17,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:17,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177293117] [2023-11-26 10:49:17,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:17,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401516506] [2023-11-26 10:49:17,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401516506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:17,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:17,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:49:17,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790475390] [2023-11-26 10:49:17,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:17,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:49:17,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:17,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:49:17,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:49:17,946 INFO L87 Difference]: Start difference. First operand 249 states and 406 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 10:49:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:18,130 INFO L93 Difference]: Finished difference Result 621 states and 1023 transitions. [2023-11-26 10:49:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:49:18,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 534 [2023-11-26 10:49:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:18,135 INFO L225 Difference]: With dead ends: 621 [2023-11-26 10:49:18,136 INFO L226 Difference]: Without dead ends: 373 [2023-11-26 10:49:18,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:49:18,138 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 206 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:18,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 1481 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:49:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-11-26 10:49:18,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 369. [2023-11-26 10:49:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 262 states have (on average 1.5725190839694656) internal successors, (412), 263 states have internal predecessors, (412), 101 states have call successors, (101), 5 states have call predecessors, (101), 5 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-26 10:49:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 614 transitions. [2023-11-26 10:49:18,185 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 614 transitions. Word has length 534 [2023-11-26 10:49:18,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:18,186 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 614 transitions. [2023-11-26 10:49:18,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 10:49:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 614 transitions. [2023-11-26 10:49:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-11-26 10:49:18,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:18,192 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:18,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:18,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:18,400 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:18,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:18,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1884242177, now seen corresponding path program 1 times [2023-11-26 10:49:18,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:18,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095427457] [2023-11-26 10:49:18,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:18,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:18,468 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:18,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025391830] [2023-11-26 10:49:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:18,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:18,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:18,470 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:18,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:49:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:18,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:49:18,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 7157 proven. 75 refuted. 0 times theorem prover too weak. 7388 trivial. 0 not checked. [2023-11-26 10:49:19,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 180 proven. 75 refuted. 0 times theorem prover too weak. 14365 trivial. 0 not checked. [2023-11-26 10:49:20,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:20,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095427457] [2023-11-26 10:49:20,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:20,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025391830] [2023-11-26 10:49:20,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025391830] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:20,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:20,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-26 10:49:20,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525948196] [2023-11-26 10:49:20,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:20,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:49:20,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:49:20,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:49:20,532 INFO L87 Difference]: Start difference. First operand 369 states and 614 transitions. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 5 states have call successors, (116), 3 states have call predecessors, (116), 5 states have return successors, (116), 5 states have call predecessors, (116), 5 states have call successors, (116) [2023-11-26 10:49:21,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:21,312 INFO L93 Difference]: Finished difference Result 743 states and 1233 transitions. [2023-11-26 10:49:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:49:21,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 5 states have call successors, (116), 3 states have call predecessors, (116), 5 states have return successors, (116), 5 states have call predecessors, (116), 5 states have call successors, (116) Word has length 534 [2023-11-26 10:49:21,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:21,320 INFO L225 Difference]: With dead ends: 743 [2023-11-26 10:49:21,320 INFO L226 Difference]: Without dead ends: 375 [2023-11-26 10:49:21,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1070 GetRequests, 1058 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:49:21,323 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 620 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:21,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 716 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 10:49:21,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-11-26 10:49:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 369. [2023-11-26 10:49:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 262 states have (on average 1.5648854961832062) internal successors, (410), 263 states have internal predecessors, (410), 101 states have call successors, (101), 5 states have call predecessors, (101), 5 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-26 10:49:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 612 transitions. [2023-11-26 10:49:21,379 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 612 transitions. Word has length 534 [2023-11-26 10:49:21,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:21,380 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 612 transitions. [2023-11-26 10:49:21,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 5 states have call successors, (116), 3 states have call predecessors, (116), 5 states have return successors, (116), 5 states have call predecessors, (116), 5 states have call successors, (116) [2023-11-26 10:49:21,381 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 612 transitions. [2023-11-26 10:49:21,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-11-26 10:49:21,386 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:21,387 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:21,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:21,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:49:21,597 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:21,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1038917821, now seen corresponding path program 1 times [2023-11-26 10:49:21,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:21,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368061923] [2023-11-26 10:49:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:21,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:21,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:21,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703584368] [2023-11-26 10:49:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:21,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:21,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:21,682 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:21,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:49:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:22,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:49:22,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 10:49:22,982 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:22,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:22,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368061923] [2023-11-26 10:49:22,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:22,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703584368] [2023-11-26 10:49:22,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703584368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:22,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:22,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:22,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712764469] [2023-11-26 10:49:22,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:22,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:22,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:22,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:22,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:22,987 INFO L87 Difference]: Start difference. First operand 369 states and 612 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 10:49:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:23,097 INFO L93 Difference]: Finished difference Result 1105 states and 1834 transitions. [2023-11-26 10:49:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:23,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 534 [2023-11-26 10:49:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:23,105 INFO L225 Difference]: With dead ends: 1105 [2023-11-26 10:49:23,106 INFO L226 Difference]: Without dead ends: 737 [2023-11-26 10:49:23,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 532 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 10:49:23,108 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 118 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:23,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 780 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:23,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2023-11-26 10:49:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 735. [2023-11-26 10:49:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 522 states have (on average 1.5517241379310345) internal successors, (810), 524 states have internal predecessors, (810), 202 states have call successors, (202), 10 states have call predecessors, (202), 10 states have return successors, (202), 200 states have call predecessors, (202), 202 states have call successors, (202) [2023-11-26 10:49:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1214 transitions. [2023-11-26 10:49:23,233 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1214 transitions. Word has length 534 [2023-11-26 10:49:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:23,235 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1214 transitions. [2023-11-26 10:49:23,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 10:49:23,235 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1214 transitions. [2023-11-26 10:49:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2023-11-26 10:49:23,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:23,241 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:23,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:23,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:23,453 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:23,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:23,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2087767238, now seen corresponding path program 1 times [2023-11-26 10:49:23,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:23,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984676234] [2023-11-26 10:49:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:23,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:23,528 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:23,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254268742] [2023-11-26 10:49:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:23,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:23,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:23,530 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:23,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:49:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:24,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:49:24,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 10:49:24,086 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:24,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:24,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984676234] [2023-11-26 10:49:24,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:24,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254268742] [2023-11-26 10:49:24,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254268742] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:24,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:24,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:49:24,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753641518] [2023-11-26 10:49:24,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:24,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:24,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:24,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:24,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:24,092 INFO L87 Difference]: Start difference. First operand 735 states and 1214 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 10:49:24,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:24,208 INFO L93 Difference]: Finished difference Result 1579 states and 2600 transitions. [2023-11-26 10:49:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:24,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 535 [2023-11-26 10:49:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:24,218 INFO L225 Difference]: With dead ends: 1579 [2023-11-26 10:49:24,219 INFO L226 Difference]: Without dead ends: 845 [2023-11-26 10:49:24,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 533 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 10:49:24,223 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 37 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:24,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 800 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:24,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2023-11-26 10:49:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 771. [2023-11-26 10:49:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 558 states have (on average 1.5448028673835126) internal successors, (862), 560 states have internal predecessors, (862), 202 states have call successors, (202), 10 states have call predecessors, (202), 10 states have return successors, (202), 200 states have call predecessors, (202), 202 states have call successors, (202) [2023-11-26 10:49:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1266 transitions. [2023-11-26 10:49:24,344 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1266 transitions. Word has length 535 [2023-11-26 10:49:24,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:24,345 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1266 transitions. [2023-11-26 10:49:24,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 10:49:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1266 transitions. [2023-11-26 10:49:24,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2023-11-26 10:49:24,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:24,352 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:24,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:24,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:24,561 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:24,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:24,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1223087148, now seen corresponding path program 1 times [2023-11-26 10:49:24,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:24,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549679055] [2023-11-26 10:49:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:24,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:24,627 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:24,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956658582] [2023-11-26 10:49:24,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:24,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:24,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:24,629 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:24,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:49:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:25,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:49:25,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 10:49:25,092 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:25,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:25,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549679055] [2023-11-26 10:49:25,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:25,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956658582] [2023-11-26 10:49:25,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956658582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:25,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:25,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:49:25,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847302837] [2023-11-26 10:49:25,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:25,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:25,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:25,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:25,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:25,098 INFO L87 Difference]: Start difference. First operand 771 states and 1266 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 10:49:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:25,304 INFO L93 Difference]: Finished difference Result 2303 states and 3784 transitions. [2023-11-26 10:49:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:25,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 535 [2023-11-26 10:49:25,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:25,319 INFO L225 Difference]: With dead ends: 2303 [2023-11-26 10:49:25,319 INFO L226 Difference]: Without dead ends: 1533 [2023-11-26 10:49:25,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 533 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 10:49:25,323 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 382 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:25,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1136 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:49:25,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2023-11-26 10:49:25,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1531. [2023-11-26 10:49:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1106 states have (on average 1.5352622061482821) internal successors, (1698), 1110 states have internal predecessors, (1698), 404 states have call successors, (404), 20 states have call predecessors, (404), 20 states have return successors, (404), 400 states have call predecessors, (404), 404 states have call successors, (404) [2023-11-26 10:49:25,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 2506 transitions. [2023-11-26 10:49:25,545 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 2506 transitions. Word has length 535 [2023-11-26 10:49:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:25,546 INFO L495 AbstractCegarLoop]: Abstraction has 1531 states and 2506 transitions. [2023-11-26 10:49:25,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 10:49:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 2506 transitions. [2023-11-26 10:49:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2023-11-26 10:49:25,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:25,554 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:25,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:25,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 10:49:25,763 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:25,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:25,764 INFO L85 PathProgramCache]: Analyzing trace with hash 355509267, now seen corresponding path program 1 times [2023-11-26 10:49:25,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:25,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210773187] [2023-11-26 10:49:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:25,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:25,843 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:25,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403719697] [2023-11-26 10:49:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:25,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:25,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:25,845 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:25,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:49:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:26,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:49:26,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 10:49:26,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:26,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:26,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210773187] [2023-11-26 10:49:26,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:26,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403719697] [2023-11-26 10:49:26,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403719697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:26,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:26,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:49:26,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966619706] [2023-11-26 10:49:26,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:26,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:49:26,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:26,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:49:26,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:49:26,538 INFO L87 Difference]: Start difference. First operand 1531 states and 2506 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 10:49:26,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:26,891 INFO L93 Difference]: Finished difference Result 2587 states and 4176 transitions. [2023-11-26 10:49:26,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:49:26,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 536 [2023-11-26 10:49:26,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:26,911 INFO L225 Difference]: With dead ends: 2587 [2023-11-26 10:49:26,912 INFO L226 Difference]: Without dead ends: 1821 [2023-11-26 10:49:26,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:49:26,916 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 100 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:26,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1649 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:49:26,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2023-11-26 10:49:27,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1629. [2023-11-26 10:49:27,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1204 states have (on average 1.5249169435215948) internal successors, (1836), 1208 states have internal predecessors, (1836), 404 states have call successors, (404), 20 states have call predecessors, (404), 20 states have return successors, (404), 400 states have call predecessors, (404), 404 states have call successors, (404) [2023-11-26 10:49:27,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2644 transitions. [2023-11-26 10:49:27,222 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2644 transitions. Word has length 536 [2023-11-26 10:49:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:27,224 INFO L495 AbstractCegarLoop]: Abstraction has 1629 states and 2644 transitions. [2023-11-26 10:49:27,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 10:49:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2644 transitions. [2023-11-26 10:49:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2023-11-26 10:49:27,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:27,231 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:27,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:27,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:27,442 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:27,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:27,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2002329056, now seen corresponding path program 1 times [2023-11-26 10:49:27,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:27,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420027690] [2023-11-26 10:49:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:27,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:27,517 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:27,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866445286] [2023-11-26 10:49:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:27,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:27,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:27,520 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:27,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:49:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:28,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:49:28,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 5569 proven. 378 refuted. 0 times theorem prover too weak. 8673 trivial. 0 not checked. [2023-11-26 10:49:31,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 66 proven. 189 refuted. 0 times theorem prover too weak. 14365 trivial. 0 not checked. [2023-11-26 10:49:33,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:33,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420027690] [2023-11-26 10:49:33,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:33,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866445286] [2023-11-26 10:49:33,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866445286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:33,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:33,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2023-11-26 10:49:33,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364926011] [2023-11-26 10:49:33,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:33,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:49:33,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:33,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:49:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:49:33,020 INFO L87 Difference]: Start difference. First operand 1629 states and 2644 transitions. Second operand has 14 states, 13 states have (on average 14.76923076923077) internal successors, (192), 12 states have internal predecessors, (192), 6 states have call successors, (172), 4 states have call predecessors, (172), 6 states have return successors, (172), 6 states have call predecessors, (172), 6 states have call successors, (172) [2023-11-26 10:49:37,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:37,016 INFO L93 Difference]: Finished difference Result 9189 states and 14806 transitions. [2023-11-26 10:49:37,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 10:49:37,017 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 14.76923076923077) internal successors, (192), 12 states have internal predecessors, (192), 6 states have call successors, (172), 4 states have call predecessors, (172), 6 states have return successors, (172), 6 states have call predecessors, (172), 6 states have call successors, (172) Word has length 536 [2023-11-26 10:49:37,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:37,089 INFO L225 Difference]: With dead ends: 9189 [2023-11-26 10:49:37,090 INFO L226 Difference]: Without dead ends: 7561 [2023-11-26 10:49:37,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1059 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=313, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:49:37,105 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 1543 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:37,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1649 Valid, 1881 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-26 10:49:37,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7561 states. [2023-11-26 10:49:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7561 to 5711. [2023-11-26 10:49:38,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5711 states, 4278 states have (on average 1.512388966806919) internal successors, (6470), 4298 states have internal predecessors, (6470), 1356 states have call successors, (1356), 76 states have call predecessors, (1356), 76 states have return successors, (1356), 1336 states have call predecessors, (1356), 1356 states have call successors, (1356) [2023-11-26 10:49:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5711 states to 5711 states and 9182 transitions. [2023-11-26 10:49:38,273 INFO L78 Accepts]: Start accepts. Automaton has 5711 states and 9182 transitions. Word has length 536 [2023-11-26 10:49:38,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:38,274 INFO L495 AbstractCegarLoop]: Abstraction has 5711 states and 9182 transitions. [2023-11-26 10:49:38,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 14.76923076923077) internal successors, (192), 12 states have internal predecessors, (192), 6 states have call successors, (172), 4 states have call predecessors, (172), 6 states have return successors, (172), 6 states have call predecessors, (172), 6 states have call successors, (172) [2023-11-26 10:49:38,275 INFO L276 IsEmpty]: Start isEmpty. Operand 5711 states and 9182 transitions. [2023-11-26 10:49:38,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2023-11-26 10:49:38,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:38,284 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:38,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:38,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:38,495 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:38,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:38,495 INFO L85 PathProgramCache]: Analyzing trace with hash 156961890, now seen corresponding path program 1 times [2023-11-26 10:49:38,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:38,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736108050] [2023-11-26 10:49:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:38,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:38,564 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:38,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634052894] [2023-11-26 10:49:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:38,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:38,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:38,566 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:38,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517be96d-fc07-4ecc-bce6-a4f32ade7810/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 10:49:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:39,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 10:49:39,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 3718 proven. 873 refuted. 0 times theorem prover too weak. 10029 trivial. 0 not checked. [2023-11-26 10:49:45,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 111 proven. 891 refuted. 0 times theorem prover too weak. 13618 trivial. 0 not checked. [2023-11-26 10:49:50,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:50,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736108050] [2023-11-26 10:49:50,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:50,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634052894] [2023-11-26 10:49:50,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634052894] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:50,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:50,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2023-11-26 10:49:50,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297320570] [2023-11-26 10:49:50,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:50,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 10:49:50,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:50,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 10:49:50,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2023-11-26 10:49:50,955 INFO L87 Difference]: Start difference. First operand 5711 states and 9182 transitions. Second operand has 29 states, 28 states have (on average 8.428571428571429) internal successors, (236), 27 states have internal predecessors, (236), 10 states have call successors, (166), 6 states have call predecessors, (166), 12 states have return successors, (166), 9 states have call predecessors, (166), 10 states have call successors, (166)