./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label28.c --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_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/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_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label28.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/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_1e884f6e-636e-41b2-b282-9ace1b8272c2/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 50d4dc867b32b96b92601ebe38f19b8224ed88b42cf3b65b00cb03246e020b18 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:47:07,403 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:47:07,511 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:47:07,520 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:47:07,521 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:47:07,564 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:47:07,565 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:47:07,566 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:47:07,567 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:47:07,572 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:47:07,573 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:47:07,574 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:47:07,575 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:47:07,577 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:47:07,577 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:47:07,578 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:47:07,578 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:47:07,579 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:47:07,579 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:47:07,580 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:47:07,580 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:47:07,581 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:47:07,581 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:47:07,582 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:47:07,582 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:47:07,583 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:47:07,583 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:47:07,584 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:47:07,584 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:47:07,585 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:47:07,586 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:47:07,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:07,587 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:47:07,587 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:47:07,587 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:47:07,588 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:47:07,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:47:07,588 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:47:07,589 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:47:07,589 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:47:07,590 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:47:07,593 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:47:07,594 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_1e884f6e-636e-41b2-b282-9ace1b8272c2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50d4dc867b32b96b92601ebe38f19b8224ed88b42cf3b65b00cb03246e020b18 [2023-11-26 10:47:07,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:47:07,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:47:07,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:47:07,903 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:47:07,903 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:47:07,905 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem14_label28.c [2023-11-26 10:47:11,070 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:47:11,398 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:47:11,398 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/sv-benchmarks/c/eca-rers2012/Problem14_label28.c [2023-11-26 10:47:11,414 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/data/f04b8c3f8/16193c9d896341d2a33193975836a4b6/FLAGcfa3b324d [2023-11-26 10:47:11,439 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/data/f04b8c3f8/16193c9d896341d2a33193975836a4b6 [2023-11-26 10:47:11,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:47:11,444 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:47:11,448 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:11,449 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:47:11,455 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:47:11,456 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:11" (1/1) ... [2023-11-26 10:47:11,457 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e989d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:11, skipping insertion in model container [2023-11-26 10:47:11,457 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:11" (1/1) ... [2023-11-26 10:47:11,529 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:47:11,770 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_1e884f6e-636e-41b2-b282-9ace1b8272c2/sv-benchmarks/c/eca-rers2012/Problem14_label28.c[1344,1357] [2023-11-26 10:47:12,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:12,079 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:47:12,094 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_1e884f6e-636e-41b2-b282-9ace1b8272c2/sv-benchmarks/c/eca-rers2012/Problem14_label28.c[1344,1357] [2023-11-26 10:47:12,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:12,337 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:47:12,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:12 WrapperNode [2023-11-26 10:47:12,338 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:12,339 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:12,340 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:47:12,340 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:47:12,347 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:12" (1/1) ... [2023-11-26 10:47:12,370 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:12" (1/1) ... [2023-11-26 10:47:12,431 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 859 [2023-11-26 10:47:12,431 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:12,432 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:47:12,432 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:47:12,432 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:47:12,448 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:12" (1/1) ... [2023-11-26 10:47:12,449 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:12" (1/1) ... [2023-11-26 10:47:12,455 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:12" (1/1) ... [2023-11-26 10:47:12,496 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 10:47:12,497 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:12" (1/1) ... [2023-11-26 10:47:12,497 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:12" (1/1) ... [2023-11-26 10:47:12,531 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:12" (1/1) ... [2023-11-26 10:47:12,540 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:12" (1/1) ... [2023-11-26 10:47:12,551 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:12" (1/1) ... [2023-11-26 10:47:12,558 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:12" (1/1) ... [2023-11-26 10:47:12,596 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:47:12,597 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:47:12,597 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:47:12,597 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:47:12,598 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:12" (1/1) ... [2023-11-26 10:47:12,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:12,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:12,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:47:12,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:47:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:47:12,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:47:12,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:47:12,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:47:12,780 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:47:12,784 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:47:14,335 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:47:14,409 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:47:14,410 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:47:14,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:14 BoogieIcfgContainer [2023-11-26 10:47:14,410 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:47:14,413 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:47:14,413 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:47:14,417 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:47:14,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:47:11" (1/3) ... [2023-11-26 10:47:14,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32505603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:14, skipping insertion in model container [2023-11-26 10:47:14,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:12" (2/3) ... [2023-11-26 10:47:14,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32505603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:14, skipping insertion in model container [2023-11-26 10:47:14,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:14" (3/3) ... [2023-11-26 10:47:14,421 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label28.c [2023-11-26 10:47:14,442 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:47:14,442 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:47:14,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:47:14,511 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;@4e7df95b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:47:14,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:47:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-26 10:47:14,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:14,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:14,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:14,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:14,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1665107622, now seen corresponding path program 1 times [2023-11-26 10:47:14,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:14,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729792836] [2023-11-26 10:47:14,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:14,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:14,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:14,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729792836] [2023-11-26 10:47:14,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729792836] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:14,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:14,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:47:14,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307112027] [2023-11-26 10:47:14,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:14,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:47:14,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:14,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:47:14,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:47:14,808 INFO L87 Difference]: Start difference. First operand has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:14,878 INFO L93 Difference]: Finished difference Result 365 states and 719 transitions. [2023-11-26 10:47:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:47:14,882 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-26 10:47:14,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:14,897 INFO L225 Difference]: With dead ends: 365 [2023-11-26 10:47:14,897 INFO L226 Difference]: Without dead ends: 181 [2023-11-26 10:47:14,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:47:14,908 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:14,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 295 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:14,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-26 10:47:14,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-11-26 10:47:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.6388888888888888) internal successors, (295), 180 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 295 transitions. [2023-11-26 10:47:14,983 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 295 transitions. Word has length 9 [2023-11-26 10:47:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:14,983 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 295 transitions. [2023-11-26 10:47:14,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:14,984 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 295 transitions. [2023-11-26 10:47:14,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-26 10:47:14,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:14,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:14,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:47:14,985 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:14,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:14,987 INFO L85 PathProgramCache]: Analyzing trace with hash -341639346, now seen corresponding path program 1 times [2023-11-26 10:47:14,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:14,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552022589] [2023-11-26 10:47:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:14,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:15,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:15,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552022589] [2023-11-26 10:47:15,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552022589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:15,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:15,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:47:15,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212504007] [2023-11-26 10:47:15,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:15,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:15,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:15,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:15,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:15,141 INFO L87 Difference]: Start difference. First operand 181 states and 295 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:16,039 INFO L93 Difference]: Finished difference Result 361 states and 589 transitions. [2023-11-26 10:47:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:16,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-26 10:47:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:16,043 INFO L225 Difference]: With dead ends: 361 [2023-11-26 10:47:16,043 INFO L226 Difference]: Without dead ends: 359 [2023-11-26 10:47:16,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:16,045 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 192 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:16,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 10 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 10:47:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-26 10:47:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2023-11-26 10:47:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.6396648044692737) internal successors, (587), 358 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 587 transitions. [2023-11-26 10:47:16,088 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 587 transitions. Word has length 9 [2023-11-26 10:47:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:16,088 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 587 transitions. [2023-11-26 10:47:16,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 587 transitions. [2023-11-26 10:47:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-26 10:47:16,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:16,093 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:16,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:47:16,094 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:16,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:16,095 INFO L85 PathProgramCache]: Analyzing trace with hash 569113148, now seen corresponding path program 1 times [2023-11-26 10:47:16,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:16,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52013121] [2023-11-26 10:47:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:16,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:16,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:16,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52013121] [2023-11-26 10:47:16,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52013121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:16,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:16,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:47:16,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046259334] [2023-11-26 10:47:16,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:16,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:16,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:16,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:16,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:16,362 INFO L87 Difference]: Start difference. First operand 359 states and 587 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:17,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:17,283 INFO L93 Difference]: Finished difference Result 1073 states and 1758 transitions. [2023-11-26 10:47:17,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:17,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-11-26 10:47:17,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:17,288 INFO L225 Difference]: With dead ends: 1073 [2023-11-26 10:47:17,288 INFO L226 Difference]: Without dead ends: 715 [2023-11-26 10:47:17,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:17,298 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:17,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 87 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 10:47:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2023-11-26 10:47:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 537. [2023-11-26 10:47:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.4944029850746268) internal successors, (801), 536 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:17,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 801 transitions. [2023-11-26 10:47:17,325 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 801 transitions. Word has length 74 [2023-11-26 10:47:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:17,326 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 801 transitions. [2023-11-26 10:47:17,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:17,326 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 801 transitions. [2023-11-26 10:47:17,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-26 10:47:17,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:17,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:17,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:47:17,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:17,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:17,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1255759449, now seen corresponding path program 1 times [2023-11-26 10:47:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:17,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982248781] [2023-11-26 10:47:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:17,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:17,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:17,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982248781] [2023-11-26 10:47:17,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982248781] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:17,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:17,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:17,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126596164] [2023-11-26 10:47:17,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:17,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:17,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:17,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:47:17,765 INFO L87 Difference]: Start difference. First operand 537 states and 801 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:19,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:19,005 INFO L93 Difference]: Finished difference Result 1429 states and 2029 transitions. [2023-11-26 10:47:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:47:19,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2023-11-26 10:47:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:19,011 INFO L225 Difference]: With dead ends: 1429 [2023-11-26 10:47:19,012 INFO L226 Difference]: Without dead ends: 893 [2023-11-26 10:47:19,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:47:19,015 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 418 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:19,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 119 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 10:47:19,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2023-11-26 10:47:19,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2023-11-26 10:47:19,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.3374439461883407) internal successors, (1193), 892 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1193 transitions. [2023-11-26 10:47:19,040 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1193 transitions. Word has length 88 [2023-11-26 10:47:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:19,041 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1193 transitions. [2023-11-26 10:47:19,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1193 transitions. [2023-11-26 10:47:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-26 10:47:19,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:19,053 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:19,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:47:19,053 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:19,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:19,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1397272493, now seen corresponding path program 1 times [2023-11-26 10:47:19,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:19,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308364404] [2023-11-26 10:47:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:19,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:19,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:19,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308364404] [2023-11-26 10:47:19,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308364404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:19,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:19,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:19,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348261340] [2023-11-26 10:47:19,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:19,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:19,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:47:19,495 INFO L87 Difference]: Start difference. First operand 893 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:20,388 INFO L93 Difference]: Finished difference Result 1992 states and 2628 transitions. [2023-11-26 10:47:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:47:20,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2023-11-26 10:47:20,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:20,395 INFO L225 Difference]: With dead ends: 1992 [2023-11-26 10:47:20,396 INFO L226 Difference]: Without dead ends: 1071 [2023-11-26 10:47:20,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:47:20,398 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 116 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:20,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 116 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 10:47:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2023-11-26 10:47:20,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1071. [2023-11-26 10:47:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 1.1803738317757009) internal successors, (1263), 1070 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1263 transitions. [2023-11-26 10:47:20,434 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1263 transitions. Word has length 168 [2023-11-26 10:47:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:20,435 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1263 transitions. [2023-11-26 10:47:20,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:20,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1263 transitions. [2023-11-26 10:47:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-11-26 10:47:20,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:20,450 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:20,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:47:20,451 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:20,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:20,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1647017351, now seen corresponding path program 1 times [2023-11-26 10:47:20,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:20,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074719615] [2023-11-26 10:47:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:20,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:20,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:20,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074719615] [2023-11-26 10:47:20,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074719615] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:20,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948793249] [2023-11-26 10:47:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:20,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:20,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:20,905 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:20,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:47:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:21,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:47:21,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-26 10:47:21,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:21,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948793249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:21,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:47:21,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-26 10:47:21,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400418591] [2023-11-26 10:47:21,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:21,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:21,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:21,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:21,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:21,136 INFO L87 Difference]: Start difference. First operand 1071 states and 1263 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:21,941 INFO L93 Difference]: Finished difference Result 2497 states and 3032 transitions. [2023-11-26 10:47:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:21,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2023-11-26 10:47:21,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:21,951 INFO L225 Difference]: With dead ends: 2497 [2023-11-26 10:47:21,952 INFO L226 Difference]: Without dead ends: 1427 [2023-11-26 10:47:21,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:21,954 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 172 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:21,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 83 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 10:47:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2023-11-26 10:47:21,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1071. [2023-11-26 10:47:21,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 1.1803738317757009) internal successors, (1263), 1070 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1263 transitions. [2023-11-26 10:47:21,989 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1263 transitions. Word has length 180 [2023-11-26 10:47:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:21,990 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1263 transitions. [2023-11-26 10:47:21,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1263 transitions. [2023-11-26 10:47:21,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-11-26 10:47:21,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:21,993 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:22,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:22,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:22,200 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:22,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:22,200 INFO L85 PathProgramCache]: Analyzing trace with hash 838699624, now seen corresponding path program 1 times [2023-11-26 10:47:22,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:22,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473610712] [2023-11-26 10:47:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:22,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:22,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:22,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473610712] [2023-11-26 10:47:22,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473610712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:22,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:22,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:22,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033769332] [2023-11-26 10:47:22,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:22,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:22,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:22,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:22,498 INFO L87 Difference]: Start difference. First operand 1071 states and 1263 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:23,186 INFO L93 Difference]: Finished difference Result 2675 states and 3212 transitions. [2023-11-26 10:47:23,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:23,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2023-11-26 10:47:23,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:23,197 INFO L225 Difference]: With dead ends: 2675 [2023-11-26 10:47:23,197 INFO L226 Difference]: Without dead ends: 1605 [2023-11-26 10:47:23,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 10:47:23,200 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 110 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:23,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 56 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 10:47:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2023-11-26 10:47:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1427. [2023-11-26 10:47:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 1.156381486676017) internal successors, (1649), 1426 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 1649 transitions. [2023-11-26 10:47:23,241 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 1649 transitions. Word has length 183 [2023-11-26 10:47:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:23,242 INFO L495 AbstractCegarLoop]: Abstraction has 1427 states and 1649 transitions. [2023-11-26 10:47:23,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 1649 transitions. [2023-11-26 10:47:23,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-26 10:47:23,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:23,247 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:23,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:47:23,248 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:23,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:23,249 INFO L85 PathProgramCache]: Analyzing trace with hash 711817524, now seen corresponding path program 1 times [2023-11-26 10:47:23,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:23,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750525528] [2023-11-26 10:47:23,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:23,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 78 proven. 130 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-26 10:47:23,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:23,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750525528] [2023-11-26 10:47:23,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750525528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:23,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452419765] [2023-11-26 10:47:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:23,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:23,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:23,863 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:23,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:47:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:24,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:47:24,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2023-11-26 10:47:24,447 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:24,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452419765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:24,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:47:24,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-26 10:47:24,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202759839] [2023-11-26 10:47:24,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:24,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:24,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:24,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:24,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:24,451 INFO L87 Difference]: Start difference. First operand 1427 states and 1649 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:25,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:25,180 INFO L93 Difference]: Finished difference Result 3209 states and 3787 transitions. [2023-11-26 10:47:25,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:25,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 302 [2023-11-26 10:47:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:25,192 INFO L225 Difference]: With dead ends: 3209 [2023-11-26 10:47:25,192 INFO L226 Difference]: Without dead ends: 1961 [2023-11-26 10:47:25,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:25,195 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 82 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:25,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 45 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 10:47:25,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2023-11-26 10:47:25,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1783. [2023-11-26 10:47:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 1.1402918069584735) internal successors, (2032), 1782 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2032 transitions. [2023-11-26 10:47:25,241 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2032 transitions. Word has length 302 [2023-11-26 10:47:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:25,241 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2032 transitions. [2023-11-26 10:47:25,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:25,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2032 transitions. [2023-11-26 10:47:25,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2023-11-26 10:47:25,249 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:25,249 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:25,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:25,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:25,456 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:25,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:25,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1548544558, now seen corresponding path program 1 times [2023-11-26 10:47:25,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:25,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145471214] [2023-11-26 10:47:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:25,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-11-26 10:47:25,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:25,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145471214] [2023-11-26 10:47:25,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145471214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:25,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:25,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:25,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442064410] [2023-11-26 10:47:25,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:25,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:25,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:25,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:25,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:47:25,984 INFO L87 Difference]: Start difference. First operand 1783 states and 2032 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:26,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:26,822 INFO L93 Difference]: Finished difference Result 3594 states and 4115 transitions. [2023-11-26 10:47:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:47:26,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 379 [2023-11-26 10:47:26,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:26,835 INFO L225 Difference]: With dead ends: 3594 [2023-11-26 10:47:26,835 INFO L226 Difference]: Without dead ends: 1961 [2023-11-26 10:47:26,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:47:26,841 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:26,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 14 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 10:47:26,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2023-11-26 10:47:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1783. [2023-11-26 10:47:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 1.0897867564534232) internal successors, (1942), 1782 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 1942 transitions. [2023-11-26 10:47:26,893 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 1942 transitions. Word has length 379 [2023-11-26 10:47:26,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:26,898 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 1942 transitions. [2023-11-26 10:47:26,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 1942 transitions. [2023-11-26 10:47:26,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2023-11-26 10:47:26,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:26,906 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:26,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:47:26,907 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:26,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:26,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1040274267, now seen corresponding path program 1 times [2023-11-26 10:47:26,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:26,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019415557] [2023-11-26 10:47:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:26,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-26 10:47:27,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:27,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019415557] [2023-11-26 10:47:27,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019415557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:27,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:27,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:27,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071407081] [2023-11-26 10:47:27,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:27,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:27,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:27,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:27,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:27,459 INFO L87 Difference]: Start difference. First operand 1783 states and 1942 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:28,169 INFO L93 Difference]: Finished difference Result 4099 states and 4526 transitions. [2023-11-26 10:47:28,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:28,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 402 [2023-11-26 10:47:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:28,184 INFO L225 Difference]: With dead ends: 4099 [2023-11-26 10:47:28,185 INFO L226 Difference]: Without dead ends: 2495 [2023-11-26 10:47:28,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 10:47:28,188 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 112 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:28,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 200 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 10:47:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2023-11-26 10:47:28,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2317. [2023-11-26 10:47:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 1.0936960276338514) internal successors, (2533), 2316 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2533 transitions. [2023-11-26 10:47:28,253 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2533 transitions. Word has length 402 [2023-11-26 10:47:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:28,254 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 2533 transitions. [2023-11-26 10:47:28,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2533 transitions. [2023-11-26 10:47:28,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-11-26 10:47:28,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:28,264 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:28,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:47:28,265 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:28,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash 647539142, now seen corresponding path program 1 times [2023-11-26 10:47:28,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:28,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597232142] [2023-11-26 10:47:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:28,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 351 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-26 10:47:28,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:28,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597232142] [2023-11-26 10:47:28,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597232142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:28,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:28,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:28,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993344856] [2023-11-26 10:47:28,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:28,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:28,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:28,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:28,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:28,687 INFO L87 Difference]: Start difference. First operand 2317 states and 2533 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:29,387 INFO L93 Difference]: Finished difference Result 5523 states and 6119 transitions. [2023-11-26 10:47:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:29,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2023-11-26 10:47:29,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:29,406 INFO L225 Difference]: With dead ends: 5523 [2023-11-26 10:47:29,407 INFO L226 Difference]: Without dead ends: 3385 [2023-11-26 10:47:29,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 10:47:29,410 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 73 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:29,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 48 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 10:47:29,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2023-11-26 10:47:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 3385. [2023-11-26 10:47:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3384 states have (on average 1.08628841607565) internal successors, (3676), 3384 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:29,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 3676 transitions. [2023-11-26 10:47:29,497 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 3676 transitions. Word has length 443 [2023-11-26 10:47:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:29,498 INFO L495 AbstractCegarLoop]: Abstraction has 3385 states and 3676 transitions. [2023-11-26 10:47:29,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:29,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 3676 transitions. [2023-11-26 10:47:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2023-11-26 10:47:29,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:29,511 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:29,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:47:29,512 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:29,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash -944706727, now seen corresponding path program 1 times [2023-11-26 10:47:29,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:29,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373842158] [2023-11-26 10:47:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:29,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 475 proven. 0 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-11-26 10:47:30,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:30,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373842158] [2023-11-26 10:47:30,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373842158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:30,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:30,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:30,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117536519] [2023-11-26 10:47:30,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:30,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:30,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:30,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:30,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:30,196 INFO L87 Difference]: Start difference. First operand 3385 states and 3676 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:30,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:30,837 INFO L93 Difference]: Finished difference Result 6591 states and 7172 transitions. [2023-11-26 10:47:30,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:30,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 479 [2023-11-26 10:47:30,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:30,856 INFO L225 Difference]: With dead ends: 6591 [2023-11-26 10:47:30,856 INFO L226 Difference]: Without dead ends: 3385 [2023-11-26 10:47:30,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 10:47:30,861 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 103 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:30,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 239 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 10:47:30,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2023-11-26 10:47:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 3029. [2023-11-26 10:47:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 1.0789299867899604) internal successors, (3267), 3028 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3267 transitions. [2023-11-26 10:47:30,940 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3267 transitions. Word has length 479 [2023-11-26 10:47:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:30,941 INFO L495 AbstractCegarLoop]: Abstraction has 3029 states and 3267 transitions. [2023-11-26 10:47:30,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3267 transitions. [2023-11-26 10:47:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2023-11-26 10:47:30,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:30,978 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:30,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:47:30,979 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:30,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:30,979 INFO L85 PathProgramCache]: Analyzing trace with hash 92298373, now seen corresponding path program 1 times [2023-11-26 10:47:30,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:30,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318319852] [2023-11-26 10:47:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:30,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 682 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-26 10:47:31,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:31,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318319852] [2023-11-26 10:47:31,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318319852] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:31,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968754985] [2023-11-26 10:47:31,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:31,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:31,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:31,573 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:31,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:47:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:31,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:47:31,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2023-11-26 10:47:31,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:31,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968754985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:31,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:47:31,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-26 10:47:31,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450797295] [2023-11-26 10:47:31,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:31,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:31,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:31,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:31,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:47:31,916 INFO L87 Difference]: Start difference. First operand 3029 states and 3267 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:32,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:32,541 INFO L93 Difference]: Finished difference Result 6769 states and 7300 transitions. [2023-11-26 10:47:32,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:32,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 598 [2023-11-26 10:47:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:32,559 INFO L225 Difference]: With dead ends: 6769 [2023-11-26 10:47:32,559 INFO L226 Difference]: Without dead ends: 3207 [2023-11-26 10:47:32,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:47:32,564 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 171 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:32,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 238 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 10:47:32,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2023-11-26 10:47:32,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 3029. [2023-11-26 10:47:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 1.07331571994716) internal successors, (3250), 3028 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:32,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3250 transitions. [2023-11-26 10:47:32,642 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3250 transitions. Word has length 598 [2023-11-26 10:47:32,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:32,643 INFO L495 AbstractCegarLoop]: Abstraction has 3029 states and 3250 transitions. [2023-11-26 10:47:32,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:32,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3250 transitions. [2023-11-26 10:47:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2023-11-26 10:47:32,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:32,651 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:32,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:32,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 10:47:32,858 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:32,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:32,859 INFO L85 PathProgramCache]: Analyzing trace with hash 514409538, now seen corresponding path program 1 times [2023-11-26 10:47:32,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:32,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411254814] [2023-11-26 10:47:32,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:32,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1508 backedges. 1076 proven. 110 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2023-11-26 10:47:33,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:33,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411254814] [2023-11-26 10:47:33,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411254814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:33,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025790016] [2023-11-26 10:47:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:33,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:33,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:33,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:33,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:47:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:33,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:47:33,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1508 backedges. 441 proven. 0 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2023-11-26 10:47:35,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:35,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025790016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:35,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:47:35,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-11-26 10:47:35,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160291899] [2023-11-26 10:47:35,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:35,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:47:35,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:35,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:47:35,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:47:35,656 INFO L87 Difference]: Start difference. First operand 3029 states and 3250 transitions. Second operand has 5 states, 5 states have (on average 49.6) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:36,623 INFO L93 Difference]: Finished difference Result 5897 states and 6341 transitions. [2023-11-26 10:47:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:47:36,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 49.6) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 677 [2023-11-26 10:47:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:36,642 INFO L225 Difference]: With dead ends: 5897 [2023-11-26 10:47:36,642 INFO L226 Difference]: Without dead ends: 3029 [2023-11-26 10:47:36,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:47:36,647 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 284 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:36,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 17 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 10:47:36,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2023-11-26 10:47:36,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 3029. [2023-11-26 10:47:36,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 1.060105680317041) internal successors, (3210), 3028 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:36,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3210 transitions. [2023-11-26 10:47:36,712 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3210 transitions. Word has length 677 [2023-11-26 10:47:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:36,713 INFO L495 AbstractCegarLoop]: Abstraction has 3029 states and 3210 transitions. [2023-11-26 10:47:36,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.6) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3210 transitions. [2023-11-26 10:47:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2023-11-26 10:47:36,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:36,721 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:36,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:36,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 10:47:36,928 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:36,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash 442204858, now seen corresponding path program 1 times [2023-11-26 10:47:36,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:36,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108965743] [2023-11-26 10:47:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1556 backedges. 911 proven. 0 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2023-11-26 10:47:38,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:38,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108965743] [2023-11-26 10:47:38,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108965743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:38,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:38,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:38,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950869249] [2023-11-26 10:47:38,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:38,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:38,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:38,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:38,007 INFO L87 Difference]: Start difference. First operand 3029 states and 3210 transitions. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:38,559 INFO L93 Difference]: Finished difference Result 6591 states and 7060 transitions. [2023-11-26 10:47:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:38,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 725 [2023-11-26 10:47:38,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:38,592 INFO L225 Difference]: With dead ends: 6591 [2023-11-26 10:47:38,597 INFO L226 Difference]: Without dead ends: 3919 [2023-11-26 10:47:38,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 10:47:38,603 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 21 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:38,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 216 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:47:38,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2023-11-26 10:47:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3919. [2023-11-26 10:47:38,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 1.055895865237366) internal successors, (4137), 3918 states have internal predecessors, (4137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 4137 transitions. [2023-11-26 10:47:38,705 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 4137 transitions. Word has length 725 [2023-11-26 10:47:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:38,706 INFO L495 AbstractCegarLoop]: Abstraction has 3919 states and 4137 transitions. [2023-11-26 10:47:38,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 4137 transitions. [2023-11-26 10:47:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 744 [2023-11-26 10:47:38,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:38,715 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:38,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 10:47:38,716 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:38,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:38,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2045497785, now seen corresponding path program 1 times [2023-11-26 10:47:38,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:38,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005394789] [2023-11-26 10:47:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:38,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 1057 proven. 93 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-11-26 10:47:39,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:39,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005394789] [2023-11-26 10:47:39,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005394789] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:39,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661041043] [2023-11-26 10:47:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:39,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:39,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:39,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:39,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:47:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:40,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:47:40,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2023-11-26 10:47:42,520 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:42,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661041043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:42,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:47:42,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-26 10:47:42,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394558630] [2023-11-26 10:47:42,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:42,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:42,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:42,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:42,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:42,523 INFO L87 Difference]: Start difference. First operand 3919 states and 4137 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:43,105 INFO L93 Difference]: Finished difference Result 7481 states and 7914 transitions. [2023-11-26 10:47:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:43,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 743 [2023-11-26 10:47:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:43,128 INFO L225 Difference]: With dead ends: 7481 [2023-11-26 10:47:43,128 INFO L226 Difference]: Without dead ends: 3919 [2023-11-26 10:47:43,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:43,133 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:43,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 38 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:47:43,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2023-11-26 10:47:43,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3741. [2023-11-26 10:47:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3741 states, 3740 states have (on average 1.0537433155080214) internal successors, (3941), 3740 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:43,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3741 states to 3741 states and 3941 transitions. [2023-11-26 10:47:43,202 INFO L78 Accepts]: Start accepts. Automaton has 3741 states and 3941 transitions. Word has length 743 [2023-11-26 10:47:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:43,203 INFO L495 AbstractCegarLoop]: Abstraction has 3741 states and 3941 transitions. [2023-11-26 10:47:43,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3741 states and 3941 transitions. [2023-11-26 10:47:43,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2023-11-26 10:47:43,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:43,212 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:43,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:43,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 10:47:43,419 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:43,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1493872710, now seen corresponding path program 1 times [2023-11-26 10:47:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:43,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674781651] [2023-11-26 10:47:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1571 backedges. 1094 proven. 155 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2023-11-26 10:47:44,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:44,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674781651] [2023-11-26 10:47:44,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674781651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:44,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271164804] [2023-11-26 10:47:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:44,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:44,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:44,092 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:44,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:47:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:44,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:47:44,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1571 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 1524 trivial. 0 not checked. [2023-11-26 10:47:44,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:44,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271164804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:44,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:47:44,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-26 10:47:44,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422052278] [2023-11-26 10:47:44,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:44,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:44,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:44,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:44,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:47:44,440 INFO L87 Difference]: Start difference. First operand 3741 states and 3941 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:45,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:45,010 INFO L93 Difference]: Finished difference Result 4455 states and 4672 transitions. [2023-11-26 10:47:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:45,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 745 [2023-11-26 10:47:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:45,021 INFO L225 Difference]: With dead ends: 4455 [2023-11-26 10:47:45,021 INFO L226 Difference]: Without dead ends: 4453 [2023-11-26 10:47:45,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 745 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:47:45,023 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 191 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:45,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 9 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:47:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4453 states. [2023-11-26 10:47:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4453 to 3563. [2023-11-26 10:47:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3563 states, 3562 states have (on average 1.053060078607524) internal successors, (3751), 3562 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 3751 transitions. [2023-11-26 10:47:45,095 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 3751 transitions. Word has length 745 [2023-11-26 10:47:45,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:45,096 INFO L495 AbstractCegarLoop]: Abstraction has 3563 states and 3751 transitions. [2023-11-26 10:47:45,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 3751 transitions. [2023-11-26 10:47:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2023-11-26 10:47:45,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:45,108 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:45,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:45,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 10:47:45,316 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:45,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:45,317 INFO L85 PathProgramCache]: Analyzing trace with hash -325953347, now seen corresponding path program 1 times [2023-11-26 10:47:45,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:45,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800264757] [2023-11-26 10:47:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:45,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 1630 proven. 155 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-11-26 10:47:46,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:46,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800264757] [2023-11-26 10:47:46,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800264757] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:46,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876135896] [2023-11-26 10:47:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:46,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:46,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:46,188 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:46,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:47:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:46,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:47:46,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 528 proven. 0 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2023-11-26 10:47:47,743 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:47,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876135896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:47,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:47:47,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-26 10:47:47,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468037698] [2023-11-26 10:47:47,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:47,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:47,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:47,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:47,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:47,747 INFO L87 Difference]: Start difference. First operand 3563 states and 3751 transitions. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:48,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:48,478 INFO L93 Difference]: Finished difference Result 6769 states and 7142 transitions. [2023-11-26 10:47:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:47:48,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 856 [2023-11-26 10:47:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:48,486 INFO L225 Difference]: With dead ends: 6769 [2023-11-26 10:47:48,486 INFO L226 Difference]: Without dead ends: 3563 [2023-11-26 10:47:48,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 859 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:48,490 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:48,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 11 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 10:47:48,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2023-11-26 10:47:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3563. [2023-11-26 10:47:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3563 states, 3562 states have (on average 1.051656372824256) internal successors, (3746), 3562 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 3746 transitions. [2023-11-26 10:47:48,549 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 3746 transitions. Word has length 856 [2023-11-26 10:47:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:48,551 INFO L495 AbstractCegarLoop]: Abstraction has 3563 states and 3746 transitions. [2023-11-26 10:47:48,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:48,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 3746 transitions. [2023-11-26 10:47:48,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2023-11-26 10:47:48,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:48,563 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:48,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:48,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 10:47:48,770 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:48,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:48,770 INFO L85 PathProgramCache]: Analyzing trace with hash 217890392, now seen corresponding path program 1 times [2023-11-26 10:47:48,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:48,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026102462] [2023-11-26 10:47:48,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:48,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 1732 proven. 155 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-11-26 10:47:49,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:49,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026102462] [2023-11-26 10:47:49,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026102462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:49,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670734965] [2023-11-26 10:47:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:49,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:49,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:49,512 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:49,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:47:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:49,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:47:49,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 1732 proven. 155 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-11-26 10:47:50,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 1732 proven. 155 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-11-26 10:47:50,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670734965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:50,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:50,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-26 10:47:50,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471134875] [2023-11-26 10:47:50,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:50,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:47:50,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:50,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:47:50,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:50,778 INFO L87 Difference]: Start difference. First operand 3563 states and 3746 transitions. Second operand has 6 states, 6 states have (on average 159.33333333333334) internal successors, (956), 6 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:51,995 INFO L93 Difference]: Finished difference Result 7659 states and 8057 transitions. [2023-11-26 10:47:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:47:51,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 159.33333333333334) internal successors, (956), 6 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 918 [2023-11-26 10:47:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:52,005 INFO L225 Difference]: With dead ends: 7659 [2023-11-26 10:47:52,005 INFO L226 Difference]: Without dead ends: 4453 [2023-11-26 10:47:52,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1838 GetRequests, 1834 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:52,010 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:52,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 49 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 10:47:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4453 states. [2023-11-26 10:47:52,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4453 to 4097. [2023-11-26 10:47:52,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4097 states, 4096 states have (on average 1.048828125) internal successors, (4296), 4096 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4097 states to 4097 states and 4296 transitions. [2023-11-26 10:47:52,091 INFO L78 Accepts]: Start accepts. Automaton has 4097 states and 4296 transitions. Word has length 918 [2023-11-26 10:47:52,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:52,093 INFO L495 AbstractCegarLoop]: Abstraction has 4097 states and 4296 transitions. [2023-11-26 10:47:52,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 159.33333333333334) internal successors, (956), 6 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 4097 states and 4296 transitions. [2023-11-26 10:47:52,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1009 [2023-11-26 10:47:52,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:52,107 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:52,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:52,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e884f6e-636e-41b2-b282-9ace1b8272c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:52,315 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:52,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:52,316 INFO L85 PathProgramCache]: Analyzing trace with hash -2055302869, now seen corresponding path program 1 times [2023-11-26 10:47:52,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:52,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895738399] [2023-11-26 10:47:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:52,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat