./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/half_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/half_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:29:51,468 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:29:51,530 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:29:51,535 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:29:51,535 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:29:51,559 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:29:51,559 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:29:51,560 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:29:51,561 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:29:51,561 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:29:51,562 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:29:51,562 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:29:51,563 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:29:51,563 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:29:51,564 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:29:51,564 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:29:51,565 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:29:51,565 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:29:51,566 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:29:51,566 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:29:51,567 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:29:51,568 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:29:51,568 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:29:51,569 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:29:51,569 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:29:51,570 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:29:51,570 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:29:51,571 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:29:51,571 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:29:51,571 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:29:51,572 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:29:51,572 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:29:51,572 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:29:51,573 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:29:51,573 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:29:51,573 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:29:51,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:29:51,573 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:29:51,574 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:29:51,574 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:29:51,574 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:29:51,574 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:29:51,575 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_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 [2023-11-29 03:29:51,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:29:51,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:29:51,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:29:51,841 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:29:51,842 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:29:51,843 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loop-invgen/half_2.i [2023-11-29 03:29:54,598 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:29:54,773 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:29:54,773 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/sv-benchmarks/c/loop-invgen/half_2.i [2023-11-29 03:29:54,779 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/data/cfd1e5f9c/b58559607ff14663b2de91599209f120/FLAGf973fa02c [2023-11-29 03:29:54,791 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/data/cfd1e5f9c/b58559607ff14663b2de91599209f120 [2023-11-29 03:29:54,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:29:54,794 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:29:54,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:29:54,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:29:54,800 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:29:54,801 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:29:54" (1/1) ... [2023-11-29 03:29:54,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e6fc6d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:54, skipping insertion in model container [2023-11-29 03:29:54,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:29:54" (1/1) ... [2023-11-29 03:29:54,823 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:29:54,954 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_b24f4855-6cdd-40eb-9133-75ccac6c12a7/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2023-11-29 03:29:54,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:29:54,976 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:29:54,989 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_b24f4855-6cdd-40eb-9133-75ccac6c12a7/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2023-11-29 03:29:54,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:29:55,007 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:29:55,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:55 WrapperNode [2023-11-29 03:29:55,008 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:29:55,009 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:29:55,009 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:29:55,009 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:29:55,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:55" (1/1) ... [2023-11-29 03:29:55,023 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:55" (1/1) ... [2023-11-29 03:29:55,041 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2023-11-29 03:29:55,041 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:29:55,042 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:29:55,042 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:29:55,042 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:29:55,053 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:55" (1/1) ... [2023-11-29 03:29:55,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:55" (1/1) ... [2023-11-29 03:29:55,054 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:55" (1/1) ... [2023-11-29 03:29:55,065 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]. [2023-11-29 03:29:55,065 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:55" (1/1) ... [2023-11-29 03:29:55,065 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:55" (1/1) ... [2023-11-29 03:29:55,068 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:55" (1/1) ... [2023-11-29 03:29:55,071 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:55" (1/1) ... [2023-11-29 03:29:55,072 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:55" (1/1) ... [2023-11-29 03:29:55,073 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:55" (1/1) ... [2023-11-29 03:29:55,075 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:29:55,075 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:29:55,076 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:29:55,076 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:29:55,077 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:55" (1/1) ... [2023-11-29 03:29:55,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:29:55,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:29:55,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:29:55,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:29:55,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:29:55,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:29:55,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:29:55,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:29:55,189 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:29:55,191 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:29:55,296 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:29:55,318 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:29:55,319 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 03:29:55,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:29:55 BoogieIcfgContainer [2023-11-29 03:29:55,319 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:29:55,322 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:29:55,322 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:29:55,325 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:29:55,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:29:54" (1/3) ... [2023-11-29 03:29:55,326 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3646cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:29:55, skipping insertion in model container [2023-11-29 03:29:55,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:55" (2/3) ... [2023-11-29 03:29:55,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3646cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:29:55, skipping insertion in model container [2023-11-29 03:29:55,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:29:55" (3/3) ... [2023-11-29 03:29:55,328 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2.i [2023-11-29 03:29:55,343 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:29:55,343 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:29:55,386 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:29:55,393 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;@32da3992, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:29:55,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 03:29:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 03:29:55,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:55,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:55,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:55,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:55,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1610966213, now seen corresponding path program 1 times [2023-11-29 03:29:55,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:55,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894252651] [2023-11-29 03:29:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:55,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:29:55,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:55,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894252651] [2023-11-29 03:29:55,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894252651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:29:55,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:29:55,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:29:55,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298710033] [2023-11-29 03:29:55,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:29:55,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 03:29:55,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:55,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 03:29:55,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:29:55,581 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:55,600 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2023-11-29 03:29:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 03:29:55,603 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-29 03:29:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:55,609 INFO L225 Difference]: With dead ends: 21 [2023-11-29 03:29:55,609 INFO L226 Difference]: Without dead ends: 9 [2023-11-29 03:29:55,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:29:55,615 INFO L413 NwaCegarLoop]: 12 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, 12 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 [2023-11-29 03:29:55,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:29:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-29 03:29:55,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-11-29 03:29:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2023-11-29 03:29:55,644 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2023-11-29 03:29:55,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:55,644 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2023-11-29 03:29:55,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2023-11-29 03:29:55,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 03:29:55,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:55,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:55,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 03:29:55,646 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:55,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:55,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1607272129, now seen corresponding path program 1 times [2023-11-29 03:29:55,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:55,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306587660] [2023-11-29 03:29:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:55,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:29:55,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:55,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306587660] [2023-11-29 03:29:55,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306587660] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:29:55,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:29:55,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:29:55,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445724205] [2023-11-29 03:29:55,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:29:55,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:29:55,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:55,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:29:55,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:29:55,887 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:55,933 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-11-29 03:29:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:29:55,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-29 03:29:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:55,935 INFO L225 Difference]: With dead ends: 16 [2023-11-29 03:29:55,935 INFO L226 Difference]: Without dead ends: 14 [2023-11-29 03:29:55,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:29:55,937 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:29:55,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:29:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-29 03:29:55,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-11-29 03:29:55,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:55,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-29 03:29:55,943 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-11-29 03:29:55,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:55,944 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-29 03:29:55,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-29 03:29:55,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 03:29:55,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:55,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:55,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 03:29:55,946 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:55,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:55,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1662725407, now seen corresponding path program 1 times [2023-11-29 03:29:55,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:55,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045700860] [2023-11-29 03:29:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:55,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:29:56,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:56,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045700860] [2023-11-29 03:29:56,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045700860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:29:56,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185990047] [2023-11-29 03:29:56,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:56,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:56,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:29:56,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:29:56,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:29:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:56,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 03:29:56,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:29:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:29:56,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:29:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:29:56,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185990047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:29:56,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:29:56,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 03:29:56,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248102832] [2023-11-29 03:29:56,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:29:56,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 03:29:56,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:56,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 03:29:56,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:29:56,588 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:56,949 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-11-29 03:29:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 03:29:56,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-29 03:29:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:56,952 INFO L225 Difference]: With dead ends: 39 [2023-11-29 03:29:56,952 INFO L226 Difference]: Without dead ends: 37 [2023-11-29 03:29:56,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-11-29 03:29:56,955 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 51 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:29:56,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 30 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:29:56,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-29 03:29:56,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 19. [2023-11-29 03:29:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:56,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-29 03:29:56,963 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 8 [2023-11-29 03:29:56,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:56,964 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-29 03:29:56,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-29 03:29:56,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 03:29:56,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:56,965 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:56,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-29 03:29:57,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:57,166 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:57,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:57,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1494994657, now seen corresponding path program 2 times [2023-11-29 03:29:57,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:57,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946501972] [2023-11-29 03:29:57,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:57,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:29:57,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:57,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946501972] [2023-11-29 03:29:57,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946501972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:29:57,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715972616] [2023-11-29 03:29:57,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:29:57,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:57,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:29:57,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:29:57,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:29:57,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:29:57,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:29:57,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 03:29:57,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:29:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:29:57,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:29:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:29:57,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715972616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:29:57,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:29:57,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 03:29:57,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730037926] [2023-11-29 03:29:57,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:29:57,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 03:29:57,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:57,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 03:29:57,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-29 03:29:57,491 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:57,785 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-11-29 03:29:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 03:29:57,785 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 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 10 [2023-11-29 03:29:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:57,786 INFO L225 Difference]: With dead ends: 49 [2023-11-29 03:29:57,787 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 03:29:57,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2023-11-29 03:29:57,789 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:29:57,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 72 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:29:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 03:29:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 18. [2023-11-29 03:29:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-29 03:29:57,797 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2023-11-29 03:29:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:57,797 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-29 03:29:57,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:57,798 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-29 03:29:57,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 03:29:57,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:57,798 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:57,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:29:57,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:57,999 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:57,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:57,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1953404477, now seen corresponding path program 1 times [2023-11-29 03:29:58,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:58,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856599078] [2023-11-29 03:29:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:58,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:29:58,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:58,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856599078] [2023-11-29 03:29:58,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856599078] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:29:58,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922634921] [2023-11-29 03:29:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:58,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:58,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:29:58,125 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:29:58,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:29:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:58,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:29:58,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:29:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:29:58,205 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:29:58,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922634921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:29:58,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:29:58,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-29 03:29:58,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476860563] [2023-11-29 03:29:58,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:29:58,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:29:58,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:58,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:29:58,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-29 03:29:58,207 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:58,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:58,248 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-11-29 03:29:58,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:29:58,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2023-11-29 03:29:58,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:58,249 INFO L225 Difference]: With dead ends: 26 [2023-11-29 03:29:58,249 INFO L226 Difference]: Without dead ends: 18 [2023-11-29 03:29:58,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:29:58,251 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:29:58,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:29:58,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-29 03:29:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-29 03:29:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-11-29 03:29:58,257 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2023-11-29 03:29:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:58,257 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-11-29 03:29:58,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:58,258 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-11-29 03:29:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 03:29:58,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:58,258 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:58,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 03:29:58,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:58,459 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:58,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:58,460 INFO L85 PathProgramCache]: Analyzing trace with hash -19492291, now seen corresponding path program 1 times [2023-11-29 03:29:58,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:58,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696854603] [2023-11-29 03:29:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:58,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:29:58,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:58,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696854603] [2023-11-29 03:29:58,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696854603] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:29:58,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135818062] [2023-11-29 03:29:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:58,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:58,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:29:58,696 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:29:58,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:29:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:58,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 03:29:58,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:29:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:29:58,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:29:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:29:59,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135818062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:29:59,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:29:59,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-29 03:29:59,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237394006] [2023-11-29 03:29:59,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:29:59,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 03:29:59,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:59,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 03:29:59,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:29:59,130 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:59,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:59,720 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2023-11-29 03:29:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 03:29:59,721 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 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 12 [2023-11-29 03:29:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:59,722 INFO L225 Difference]: With dead ends: 45 [2023-11-29 03:29:59,722 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 03:29:59,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 03:29:59,724 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:29:59,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 34 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:29:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 03:29:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2023-11-29 03:29:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-29 03:29:59,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2023-11-29 03:29:59,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:59,730 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-29 03:29:59,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:29:59,730 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-29 03:29:59,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 03:29:59,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:59,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:59,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:29:59,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:59,934 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:59,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:59,934 INFO L85 PathProgramCache]: Analyzing trace with hash 323433825, now seen corresponding path program 2 times [2023-11-29 03:29:59,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:59,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79483993] [2023-11-29 03:29:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:59,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:00,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:00,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79483993] [2023-11-29 03:30:00,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79483993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:00,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194884100] [2023-11-29 03:30:00,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:30:00,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:00,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:00,226 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:00,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:30:00,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:30:00,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:00,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 03:30:00,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:00,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:00,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194884100] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:00,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:00,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2023-11-29 03:30:00,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415121049] [2023-11-29 03:30:00,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:00,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 03:30:00,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:00,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 03:30:00,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-11-29 03:30:00,839 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:01,570 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2023-11-29 03:30:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 03:30:01,570 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 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 16 [2023-11-29 03:30:01,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:01,571 INFO L225 Difference]: With dead ends: 47 [2023-11-29 03:30:01,571 INFO L226 Difference]: Without dead ends: 32 [2023-11-29 03:30:01,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 03:30:01,573 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 55 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:01,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 46 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:30:01,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-29 03:30:01,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2023-11-29 03:30:01,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-29 03:30:01,582 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2023-11-29 03:30:01,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:01,582 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-29 03:30:01,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:01,582 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-29 03:30:01,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 03:30:01,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:01,583 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:01,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 03:30:01,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:01,786 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:01,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:01,786 INFO L85 PathProgramCache]: Analyzing trace with hash 661532001, now seen corresponding path program 3 times [2023-11-29 03:30:01,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:01,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588784773] [2023-11-29 03:30:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:01,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:01,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:01,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588784773] [2023-11-29 03:30:01,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588784773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:01,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974241130] [2023-11-29 03:30:01,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:30:01,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:01,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:01,995 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:01,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:30:02,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 03:30:02,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:02,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 03:30:02,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:02,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:02,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974241130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:02,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:02,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15] total 34 [2023-11-29 03:30:02,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307415452] [2023-11-29 03:30:02,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:02,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 03:30:02,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:02,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 03:30:02,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 03:30:02,443 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:03,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:03,174 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2023-11-29 03:30:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 03:30:03,175 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 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 20 [2023-11-29 03:30:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:03,176 INFO L225 Difference]: With dead ends: 80 [2023-11-29 03:30:03,176 INFO L226 Difference]: Without dead ends: 78 [2023-11-29 03:30:03,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=3294, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 03:30:03,179 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 145 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:03,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 89 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:30:03,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-29 03:30:03,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 36. [2023-11-29 03:30:03,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-11-29 03:30:03,195 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2023-11-29 03:30:03,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:03,195 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-11-29 03:30:03,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:03,195 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-11-29 03:30:03,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 03:30:03,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:03,196 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:03,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:30:03,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 03:30:03,398 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:03,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:03,398 INFO L85 PathProgramCache]: Analyzing trace with hash -133365827, now seen corresponding path program 4 times [2023-11-29 03:30:03,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:03,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978855618] [2023-11-29 03:30:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:03,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:03,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:03,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978855618] [2023-11-29 03:30:03,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978855618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:03,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174051191] [2023-11-29 03:30:03,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:30:03,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:03,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:03,764 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:03,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:30:03,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:30:03,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:03,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 03:30:03,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:04,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:04,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174051191] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:04,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:04,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 31 [2023-11-29 03:30:04,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457528052] [2023-11-29 03:30:04,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:04,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 03:30:04,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:04,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 03:30:04,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2023-11-29 03:30:04,550 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:05,513 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2023-11-29 03:30:05,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 03:30:05,513 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 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 20 [2023-11-29 03:30:05,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:05,514 INFO L225 Difference]: With dead ends: 92 [2023-11-29 03:30:05,514 INFO L226 Difference]: Without dead ends: 74 [2023-11-29 03:30:05,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=449, Invalid=2101, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 03:30:05,516 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 72 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:05,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 58 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:30:05,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-29 03:30:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 35. [2023-11-29 03:30:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:05,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-11-29 03:30:05,532 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2023-11-29 03:30:05,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:05,532 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-11-29 03:30:05,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:05,533 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-11-29 03:30:05,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 03:30:05,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:05,533 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:05,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:30:05,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 03:30:05,734 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:05,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:05,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1841711135, now seen corresponding path program 5 times [2023-11-29 03:30:05,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:05,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704902978] [2023-11-29 03:30:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:05,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:06,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:06,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704902978] [2023-11-29 03:30:06,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704902978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:06,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968218920] [2023-11-29 03:30:06,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:30:06,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:06,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:06,154 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:06,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:30:06,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 03:30:06,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:06,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 03:30:06,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:06,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:07,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968218920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:07,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:07,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 36 [2023-11-29 03:30:07,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330321142] [2023-11-29 03:30:07,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:07,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 03:30:07,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:07,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 03:30:07,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 03:30:07,098 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 36 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:08,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:08,248 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2023-11-29 03:30:08,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 03:30:08,249 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 36 states have internal predecessors, (62), 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 24 [2023-11-29 03:30:08,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:08,249 INFO L225 Difference]: With dead ends: 90 [2023-11-29 03:30:08,249 INFO L226 Difference]: Without dead ends: 69 [2023-11-29 03:30:08,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=593, Invalid=2947, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 03:30:08,251 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 93 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:08,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 59 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:30:08,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-29 03:30:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2023-11-29 03:30:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2023-11-29 03:30:08,266 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2023-11-29 03:30:08,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:08,266 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2023-11-29 03:30:08,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 36 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:08,266 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2023-11-29 03:30:08,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 03:30:08,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:08,267 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:08,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 03:30:08,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 03:30:08,467 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:08,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:08,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1386263235, now seen corresponding path program 6 times [2023-11-29 03:30:08,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:08,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234901056] [2023-11-29 03:30:08,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:08,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:08,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:08,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234901056] [2023-11-29 03:30:08,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234901056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:08,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204904047] [2023-11-29 03:30:08,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:30:08,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:08,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:08,932 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:08,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 03:30:08,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 03:30:08,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:08,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 03:30:08,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:09,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:10,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204904047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:10,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:10,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2023-11-29 03:30:10,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456119530] [2023-11-29 03:30:10,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:10,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-29 03:30:10,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:10,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-29 03:30:10,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1949, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 03:30:10,241 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:11,211 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2023-11-29 03:30:11,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 03:30:11,211 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 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 28 [2023-11-29 03:30:11,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:11,212 INFO L225 Difference]: With dead ends: 59 [2023-11-29 03:30:11,212 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 03:30:11,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=623, Invalid=4069, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 03:30:11,214 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 40 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:11,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:30:11,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 03:30:11,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-11-29 03:30:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-11-29 03:30:11,231 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2023-11-29 03:30:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:11,231 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-11-29 03:30:11,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-11-29 03:30:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 03:30:11,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:11,232 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:11,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 03:30:11,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 03:30:11,433 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:11,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:11,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1323017631, now seen corresponding path program 7 times [2023-11-29 03:30:11,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:11,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882459340] [2023-11-29 03:30:11,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:11,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:12,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:12,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882459340] [2023-11-29 03:30:12,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882459340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:12,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577974983] [2023-11-29 03:30:12,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:30:12,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:12,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:12,021 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:12,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 03:30:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:12,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 03:30:12,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:12,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:13,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577974983] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:13,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:13,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2023-11-29 03:30:13,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235240893] [2023-11-29 03:30:13,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:13,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 03:30:13,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:13,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 03:30:13,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 03:30:13,189 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:15,161 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2023-11-29 03:30:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 03:30:15,161 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 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 32 [2023-11-29 03:30:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:15,162 INFO L225 Difference]: With dead ends: 91 [2023-11-29 03:30:15,162 INFO L226 Difference]: Without dead ends: 64 [2023-11-29 03:30:15,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=882, Invalid=4818, Unknown=0, NotChecked=0, Total=5700 [2023-11-29 03:30:15,165 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 125 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:15,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 87 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:30:15,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-29 03:30:15,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2023-11-29 03:30:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-11-29 03:30:15,190 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 32 [2023-11-29 03:30:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:15,190 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-11-29 03:30:15,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:15,191 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-11-29 03:30:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 03:30:15,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:15,192 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:15,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 03:30:15,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 03:30:15,392 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:15,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:15,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1315273405, now seen corresponding path program 8 times [2023-11-29 03:30:15,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:15,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146168751] [2023-11-29 03:30:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:15,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:16,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:16,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146168751] [2023-11-29 03:30:16,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146168751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:16,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935706076] [2023-11-29 03:30:16,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:30:16,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:16,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:16,153 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:16,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 03:30:16,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:30:16,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:16,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 03:30:16,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:16,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:17,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935706076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:17,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:17,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 48 [2023-11-29 03:30:17,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699794026] [2023-11-29 03:30:17,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:17,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-29 03:30:17,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:17,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-29 03:30:17,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 03:30:17,526 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 48 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:20,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:20,034 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2023-11-29 03:30:20,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 03:30:20,034 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 48 states have internal predecessors, (95), 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 36 [2023-11-29 03:30:20,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:20,035 INFO L225 Difference]: With dead ends: 122 [2023-11-29 03:30:20,035 INFO L226 Difference]: Without dead ends: 92 [2023-11-29 03:30:20,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1083, Invalid=6057, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 03:30:20,037 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 149 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:20,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 124 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 03:30:20,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-29 03:30:20,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2023-11-29 03:30:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2023-11-29 03:30:20,068 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 36 [2023-11-29 03:30:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:20,068 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2023-11-29 03:30:20,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 48 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:20,068 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2023-11-29 03:30:20,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 03:30:20,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:20,069 INFO L195 NwaCegarLoop]: trace histogram [15, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:20,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 03:30:20,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 03:30:20,270 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:20,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:20,270 INFO L85 PathProgramCache]: Analyzing trace with hash -78230943, now seen corresponding path program 9 times [2023-11-29 03:30:20,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:20,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878113445] [2023-11-29 03:30:20,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:20,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 91 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:20,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878113445] [2023-11-29 03:30:20,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878113445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615124231] [2023-11-29 03:30:20,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:30:20,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:20,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:20,721 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:20,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 03:30:20,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 03:30:20,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:20,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 03:30:20,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:21,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:21,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615124231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:21,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:21,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 27] total 66 [2023-11-29 03:30:21,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678152151] [2023-11-29 03:30:21,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:21,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-29 03:30:21,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:21,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-29 03:30:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=851, Invalid=3439, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 03:30:21,762 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 66 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:23,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:23,971 INFO L93 Difference]: Finished difference Result 264 states and 286 transitions. [2023-11-29 03:30:23,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-29 03:30:23,971 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 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 40 [2023-11-29 03:30:23,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:23,973 INFO L225 Difference]: With dead ends: 264 [2023-11-29 03:30:23,973 INFO L226 Difference]: Without dead ends: 262 [2023-11-29 03:30:23,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6404 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5083, Invalid=14939, Unknown=0, NotChecked=0, Total=20022 [2023-11-29 03:30:23,980 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 249 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:23,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 229 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 03:30:23,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-29 03:30:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 71. [2023-11-29 03:30:24,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2023-11-29 03:30:24,024 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 40 [2023-11-29 03:30:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:24,024 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2023-11-29 03:30:24,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2023-11-29 03:30:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 03:30:24,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:24,025 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:24,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 03:30:24,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 03:30:24,226 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:24,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:24,226 INFO L85 PathProgramCache]: Analyzing trace with hash -647029535, now seen corresponding path program 10 times [2023-11-29 03:30:24,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:24,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680746292] [2023-11-29 03:30:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:24,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 70 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:24,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:24,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680746292] [2023-11-29 03:30:24,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680746292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:24,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829734050] [2023-11-29 03:30:24,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:30:24,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:24,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:24,992 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:24,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 03:30:25,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:30:25,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:25,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 03:30:25,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:25,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:26,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829734050] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:26,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:26,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 24] total 56 [2023-11-29 03:30:26,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956628059] [2023-11-29 03:30:26,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:26,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 03:30:26,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:26,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 03:30:26,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=2605, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 03:30:26,760 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 56 states, 56 states have (on average 1.8928571428571428) internal successors, (106), 56 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:29,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:29,988 INFO L93 Difference]: Finished difference Result 270 states and 282 transitions. [2023-11-29 03:30:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 03:30:29,988 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.8928571428571428) internal successors, (106), 56 states have internal predecessors, (106), 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 40 [2023-11-29 03:30:29,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:29,990 INFO L225 Difference]: With dead ends: 270 [2023-11-29 03:30:29,990 INFO L226 Difference]: Without dead ends: 237 [2023-11-29 03:30:29,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1379, Invalid=7741, Unknown=0, NotChecked=0, Total=9120 [2023-11-29 03:30:29,991 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 172 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:29,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 131 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 03:30:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-29 03:30:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 70. [2023-11-29 03:30:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2023-11-29 03:30:30,034 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 40 [2023-11-29 03:30:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:30,034 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2023-11-29 03:30:30,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.8928571428571428) internal successors, (106), 56 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2023-11-29 03:30:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 03:30:30,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:30,035 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:30,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 03:30:30,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 03:30:30,235 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:30,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:30,235 INFO L85 PathProgramCache]: Analyzing trace with hash -122189763, now seen corresponding path program 11 times [2023-11-29 03:30:30,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:30,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966455778] [2023-11-29 03:30:30,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:30,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 92 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:31,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:31,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966455778] [2023-11-29 03:30:31,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966455778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:31,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071765602] [2023-11-29 03:30:31,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:30:31,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:31,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:31,104 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:31,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 03:30:31,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-29 03:30:31,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:31,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 03:30:31,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:31,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:33,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071765602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:33,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:33,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 26] total 61 [2023-11-29 03:30:33,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223685915] [2023-11-29 03:30:33,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:33,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 03:30:33,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:33,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 03:30:33,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=3099, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 03:30:33,112 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 61 states, 61 states have (on average 1.9180327868852458) internal successors, (117), 61 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:36,815 INFO L93 Difference]: Finished difference Result 262 states and 275 transitions. [2023-11-29 03:30:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 03:30:36,815 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9180327868852458) internal successors, (117), 61 states have internal predecessors, (117), 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 44 [2023-11-29 03:30:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:36,816 INFO L225 Difference]: With dead ends: 262 [2023-11-29 03:30:36,816 INFO L226 Difference]: Without dead ends: 226 [2023-11-29 03:30:36,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2811 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1628, Invalid=9292, Unknown=0, NotChecked=0, Total=10920 [2023-11-29 03:30:36,818 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 192 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:36,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 159 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 03:30:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-29 03:30:36,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 69. [2023-11-29 03:30:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 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) [2023-11-29 03:30:36,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2023-11-29 03:30:36,867 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 44 [2023-11-29 03:30:36,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:36,868 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2023-11-29 03:30:36,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9180327868852458) internal successors, (117), 61 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:36,868 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2023-11-29 03:30:36,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 03:30:36,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:36,868 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:36,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 03:30:37,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 03:30:37,069 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:37,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:37,069 INFO L85 PathProgramCache]: Analyzing trace with hash -964559007, now seen corresponding path program 12 times [2023-11-29 03:30:37,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:37,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785122401] [2023-11-29 03:30:37,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:37,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 117 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:37,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:37,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785122401] [2023-11-29 03:30:37,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785122401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:37,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991061143] [2023-11-29 03:30:37,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:30:37,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:37,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:37,932 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:37,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 03:30:37,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-11-29 03:30:37,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:37,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 03:30:38,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:39,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:40,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991061143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:40,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:40,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 78 [2023-11-29 03:30:40,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417963482] [2023-11-29 03:30:40,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:40,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-11-29 03:30:40,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:40,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-11-29 03:30:40,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=5264, Unknown=0, NotChecked=0, Total=6006 [2023-11-29 03:30:40,733 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 78 states, 78 states have (on average 1.7820512820512822) internal successors, (139), 78 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:43,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:43,434 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2023-11-29 03:30:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 03:30:43,435 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.7820512820512822) internal successors, (139), 78 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-11-29 03:30:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:43,436 INFO L225 Difference]: With dead ends: 116 [2023-11-29 03:30:43,436 INFO L226 Difference]: Without dead ends: 77 [2023-11-29 03:30:43,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3221 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1547, Invalid=11335, Unknown=0, NotChecked=0, Total=12882 [2023-11-29 03:30:43,438 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 62 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:43,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 58 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:30:43,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-29 03:30:43,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2023-11-29 03:30:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:43,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2023-11-29 03:30:43,486 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 48 [2023-11-29 03:30:43,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:43,486 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2023-11-29 03:30:43,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.7820512820512822) internal successors, (139), 78 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:43,486 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2023-11-29 03:30:43,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 03:30:43,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:43,487 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:43,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 03:30:43,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 03:30:43,687 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:43,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash 938309053, now seen corresponding path program 13 times [2023-11-29 03:30:43,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:43,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684999618] [2023-11-29 03:30:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:43,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 145 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:44,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:44,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684999618] [2023-11-29 03:30:44,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684999618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:44,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391529367] [2023-11-29 03:30:44,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:30:44,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:44,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:44,788 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:44,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 03:30:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:44,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 03:30:44,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:45,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:47,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391529367] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:47,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:47,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 68 [2023-11-29 03:30:47,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259889447] [2023-11-29 03:30:47,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:47,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-11-29 03:30:47,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:47,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-11-29 03:30:47,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3878, Unknown=0, NotChecked=0, Total=4556 [2023-11-29 03:30:47,082 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:52,010 INFO L93 Difference]: Finished difference Result 228 states and 243 transitions. [2023-11-29 03:30:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-29 03:30:52,011 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-29 03:30:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:52,012 INFO L225 Difference]: With dead ends: 228 [2023-11-29 03:30:52,012 INFO L226 Difference]: Without dead ends: 186 [2023-11-29 03:30:52,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3727 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2097, Invalid=12423, Unknown=0, NotChecked=0, Total=14520 [2023-11-29 03:30:52,013 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 237 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:52,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 205 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1711 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 03:30:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-11-29 03:30:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 67. [2023-11-29 03:30:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2023-11-29 03:30:52,074 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 52 [2023-11-29 03:30:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:52,074 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2023-11-29 03:30:52,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2023-11-29 03:30:52,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 03:30:52,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:52,075 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:52,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 03:30:52,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 03:30:52,275 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:52,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:52,276 INFO L85 PathProgramCache]: Analyzing trace with hash 96797153, now seen corresponding path program 14 times [2023-11-29 03:30:52,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:52,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575695863] [2023-11-29 03:30:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:52,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 176 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:53,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:53,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575695863] [2023-11-29 03:30:53,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575695863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:53,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362713488] [2023-11-29 03:30:53,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:30:53,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:53,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:53,369 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:53,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 03:30:53,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:30:53,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:53,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 90 conjunts are in the unsatisfiable core [2023-11-29 03:30:53,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:54,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:56,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362713488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:56,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:56,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 32] total 89 [2023-11-29 03:30:56,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026885488] [2023-11-29 03:30:56,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:56,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-11-29 03:30:56,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:56,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-11-29 03:30:56,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1070, Invalid=6762, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 03:30:56,822 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 89 states, 89 states have (on average 1.8314606741573034) internal successors, (163), 89 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:03,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:03,099 INFO L93 Difference]: Finished difference Result 202 states and 218 transitions. [2023-11-29 03:31:03,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-11-29 03:31:03,100 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.8314606741573034) internal successors, (163), 89 states have internal predecessors, (163), 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 56 [2023-11-29 03:31:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:03,101 INFO L225 Difference]: With dead ends: 202 [2023-11-29 03:31:03,101 INFO L226 Difference]: Without dead ends: 157 [2023-11-29 03:31:03,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6558 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2974, Invalid=18488, Unknown=0, NotChecked=0, Total=21462 [2023-11-29 03:31:03,102 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 264 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:03,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 245 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 2139 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 03:31:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-29 03:31:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 66. [2023-11-29 03:31:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2023-11-29 03:31:03,159 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 56 [2023-11-29 03:31:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:03,159 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2023-11-29 03:31:03,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.8314606741573034) internal successors, (163), 89 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2023-11-29 03:31:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 03:31:03,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:03,160 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:03,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 03:31:03,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:03,361 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:03,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:03,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2053160131, now seen corresponding path program 15 times [2023-11-29 03:31:03,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:03,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825897338] [2023-11-29 03:31:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:03,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 210 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:04,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:04,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825897338] [2023-11-29 03:31:04,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825897338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:04,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309600932] [2023-11-29 03:31:04,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:31:04,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:04,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:04,740 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:04,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 03:31:04,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-11-29 03:31:04,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:04,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-29 03:31:04,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:06,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:08,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309600932] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:08,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:08,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 96 [2023-11-29 03:31:08,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25406963] [2023-11-29 03:31:08,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:08,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-29 03:31:08,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:08,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-29 03:31:08,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1099, Invalid=8021, Unknown=0, NotChecked=0, Total=9120 [2023-11-29 03:31:08,799 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 96 states, 96 states have (on average 1.8229166666666667) internal successors, (175), 96 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:13,323 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2023-11-29 03:31:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 03:31:13,324 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.8229166666666667) internal successors, (175), 96 states have internal predecessors, (175), 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 60 [2023-11-29 03:31:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:13,324 INFO L225 Difference]: With dead ends: 115 [2023-11-29 03:31:13,324 INFO L226 Difference]: Without dead ends: 67 [2023-11-29 03:31:13,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4966 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2318, Invalid=17422, Unknown=0, NotChecked=0, Total=19740 [2023-11-29 03:31:13,326 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 77 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:13,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 85 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 03:31:13,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-29 03:31:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-11-29 03:31:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-11-29 03:31:13,382 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2023-11-29 03:31:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:13,382 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-11-29 03:31:13,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.8229166666666667) internal successors, (175), 96 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-11-29 03:31:13,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 03:31:13,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:13,383 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:13,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 03:31:13,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:13,583 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:13,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:13,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1990206561, now seen corresponding path program 16 times [2023-11-29 03:31:13,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:13,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351444285] [2023-11-29 03:31:13,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:13,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 247 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:14,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:14,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351444285] [2023-11-29 03:31:14,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351444285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:14,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035356388] [2023-11-29 03:31:14,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:31:14,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:14,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:14,991 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:14,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 03:31:15,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:31:15,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:15,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-29 03:31:15,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:15,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:18,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035356388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:18,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:18,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 36] total 86 [2023-11-29 03:31:18,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599217378] [2023-11-29 03:31:18,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:18,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-11-29 03:31:18,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:18,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-11-29 03:31:18,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1078, Invalid=6232, Unknown=0, NotChecked=0, Total=7310 [2023-11-29 03:31:18,488 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 86 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:26,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:26,035 INFO L93 Difference]: Finished difference Result 179 states and 198 transitions. [2023-11-29 03:31:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-29 03:31:26,036 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 86 states have internal predecessors, (172), 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 64 [2023-11-29 03:31:26,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:26,036 INFO L225 Difference]: With dead ends: 179 [2023-11-29 03:31:26,037 INFO L226 Difference]: Without dead ends: 128 [2023-11-29 03:31:26,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5868 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3188, Invalid=19162, Unknown=0, NotChecked=0, Total=22350 [2023-11-29 03:31:26,038 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 316 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 2625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:26,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 303 Invalid, 2625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 2361 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 03:31:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-29 03:31:26,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 85. [2023-11-29 03:31:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 84 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2023-11-29 03:31:26,141 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 64 [2023-11-29 03:31:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:26,141 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2023-11-29 03:31:26,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 86 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:26,141 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2023-11-29 03:31:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 03:31:26,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:26,142 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:26,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 03:31:26,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:26,342 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:26,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:26,342 INFO L85 PathProgramCache]: Analyzing trace with hash -916131651, now seen corresponding path program 17 times [2023-11-29 03:31:26,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:26,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712938841] [2023-11-29 03:31:26,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:26,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 287 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:27,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:27,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712938841] [2023-11-29 03:31:27,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712938841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:27,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960715713] [2023-11-29 03:31:27,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:31:27,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:27,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:27,911 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:27,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 03:31:28,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-11-29 03:31:28,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:28,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-29 03:31:28,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:28,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:31,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960715713] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:31,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:31,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 38] total 91 [2023-11-29 03:31:31,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746977821] [2023-11-29 03:31:31,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:31,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-29 03:31:31,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:31,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-29 03:31:31,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=6984, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 03:31:31,777 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 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) [2023-11-29 03:31:40,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:40,630 INFO L93 Difference]: Finished difference Result 234 states and 254 transitions. [2023-11-29 03:31:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-29 03:31:40,630 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 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 68 [2023-11-29 03:31:40,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:40,632 INFO L225 Difference]: With dead ends: 234 [2023-11-29 03:31:40,632 INFO L226 Difference]: Without dead ends: 180 [2023-11-29 03:31:40,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6741 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=3618, Invalid=21822, Unknown=0, NotChecked=0, Total=25440 [2023-11-29 03:31:40,634 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 349 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 2697 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 2697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:40,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 401 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 2697 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 03:31:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-29 03:31:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 135. [2023-11-29 03:31:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1417910447761195) internal successors, (153), 134 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2023-11-29 03:31:40,783 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 68 [2023-11-29 03:31:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:40,784 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2023-11-29 03:31:40,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 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) [2023-11-29 03:31:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2023-11-29 03:31:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-29 03:31:40,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:40,785 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:40,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 03:31:40,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:40,985 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:40,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash -897882399, now seen corresponding path program 18 times [2023-11-29 03:31:40,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:40,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169155395] [2023-11-29 03:31:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:40,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 330 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:42,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:42,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169155395] [2023-11-29 03:31:42,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169155395] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:42,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410945486] [2023-11-29 03:31:42,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:31:42,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:42,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:42,712 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:42,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 03:31:42,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-11-29 03:31:42,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:42,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-29 03:31:42,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:44,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:48,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410945486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:48,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:48,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 42, 42] total 118 [2023-11-29 03:31:48,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019315223] [2023-11-29 03:31:48,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:48,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-11-29 03:31:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:48,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-11-29 03:31:48,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1626, Invalid=12180, Unknown=0, NotChecked=0, Total=13806 [2023-11-29 03:31:48,190 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand has 118 states, 118 states have (on average 1.7881355932203389) internal successors, (211), 118 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:55,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:55,335 INFO L93 Difference]: Finished difference Result 196 states and 215 transitions. [2023-11-29 03:31:55,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-29 03:31:55,336 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.7881355932203389) internal successors, (211), 118 states have internal predecessors, (211), 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 72 [2023-11-29 03:31:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:55,337 INFO L225 Difference]: With dead ends: 196 [2023-11-29 03:31:55,337 INFO L226 Difference]: Without dead ends: 139 [2023-11-29 03:31:55,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7910 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=3442, Invalid=26314, Unknown=0, NotChecked=0, Total=29756 [2023-11-29 03:31:55,338 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 99 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:55,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 76 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 03:31:55,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-29 03:31:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2023-11-29 03:31:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 134 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 152 transitions. [2023-11-29 03:31:55,489 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 152 transitions. Word has length 72 [2023-11-29 03:31:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:55,489 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 152 transitions. [2023-11-29 03:31:55,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.7881355932203389) internal successors, (211), 118 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 152 transitions. [2023-11-29 03:31:55,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-29 03:31:55,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:55,490 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:55,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 03:31:55,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:55,691 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:55,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:55,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1901191487, now seen corresponding path program 19 times [2023-11-29 03:31:55,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:55,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512453555] [2023-11-29 03:31:55,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:55,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 136 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:56,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:56,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512453555] [2023-11-29 03:31:56,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512453555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:56,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863980781] [2023-11-29 03:31:56,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:31:56,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:56,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:56,480 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:56,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 03:31:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:56,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 03:31:56,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:57,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:58,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863980781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:58,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:58,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2023-11-29 03:31:58,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767427452] [2023-11-29 03:31:58,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:58,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-11-29 03:31:58,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:58,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-11-29 03:31:58,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=916, Invalid=4634, Unknown=0, NotChecked=0, Total=5550 [2023-11-29 03:31:58,003 INFO L87 Difference]: Start difference. First operand 135 states and 152 transitions. Second operand has 75 states, 75 states have (on average 1.5066666666666666) internal successors, (113), 75 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:59,633 INFO L93 Difference]: Finished difference Result 193 states and 212 transitions. [2023-11-29 03:31:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-29 03:31:59,633 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.5066666666666666) internal successors, (113), 75 states have internal predecessors, (113), 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 73 [2023-11-29 03:31:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:59,635 INFO L225 Difference]: With dead ends: 193 [2023-11-29 03:31:59,635 INFO L226 Difference]: Without dead ends: 191 [2023-11-29 03:31:59,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 92 SyntacticMatches, 17 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4945 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3056, Invalid=12694, Unknown=0, NotChecked=0, Total=15750 [2023-11-29 03:31:59,636 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 186 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:59,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 77 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:31:59,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-29 03:31:59,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 77. [2023-11-29 03:31:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2023-11-29 03:31:59,732 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2023-11-29 03:31:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:59,732 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2023-11-29 03:31:59,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.5066666666666666) internal successors, (113), 75 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:59,733 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2023-11-29 03:31:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-29 03:31:59,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:59,733 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:59,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 03:31:59,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:59,934 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:59,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:59,934 INFO L85 PathProgramCache]: Analyzing trace with hash -657031619, now seen corresponding path program 20 times [2023-11-29 03:31:59,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:59,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800116056] [2023-11-29 03:31:59,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:59,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 376 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:01,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:01,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800116056] [2023-11-29 03:32:01,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800116056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:32:01,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605041803] [2023-11-29 03:32:01,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:32:01,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:01,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:32:01,850 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:32:01,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 03:32:01,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:32:01,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:32:01,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-29 03:32:01,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:32:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:03,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:32:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:06,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605041803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:32:06,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:32:06,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 98 [2023-11-29 03:32:06,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188082467] [2023-11-29 03:32:06,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:32:06,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-11-29 03:32:06,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:06,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-11-29 03:32:06,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=8123, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 03:32:06,519 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 98 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:32:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:32:17,530 INFO L93 Difference]: Finished difference Result 212 states and 234 transitions. [2023-11-29 03:32:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-11-29 03:32:17,531 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 98 states have internal predecessors, (205), 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 76 [2023-11-29 03:32:17,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:32:17,532 INFO L225 Difference]: With dead ends: 212 [2023-11-29 03:32:17,532 INFO L226 Difference]: Without dead ends: 152 [2023-11-29 03:32:17,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7981 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=4248, Invalid=26202, Unknown=0, NotChecked=0, Total=30450 [2023-11-29 03:32:17,533 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 400 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 3472 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 3841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 3472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:32:17,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 406 Invalid, 3841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 3472 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 03:32:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-29 03:32:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 100. [2023-11-29 03:32:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.202020202020202) internal successors, (119), 99 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:32:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2023-11-29 03:32:17,708 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 76 [2023-11-29 03:32:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:32:17,708 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2023-11-29 03:32:17,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 98 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:32:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2023-11-29 03:32:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-29 03:32:17,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:32:17,709 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:17,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 03:32:17,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 03:32:17,910 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:32:17,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:17,910 INFO L85 PathProgramCache]: Analyzing trace with hash 79612257, now seen corresponding path program 21 times [2023-11-29 03:32:17,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:17,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015151096] [2023-11-29 03:32:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:17,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 425 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:19,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:19,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015151096] [2023-11-29 03:32:19,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015151096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:32:19,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187954231] [2023-11-29 03:32:19,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:32:19,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:19,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:32:19,858 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:32:19,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 03:32:19,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-11-29 03:32:19,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:32:19,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 90 conjunts are in the unsatisfiable core [2023-11-29 03:32:19,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:32:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:22,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:32:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:26,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187954231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:32:26,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:32:26,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 44] total 124 [2023-11-29 03:32:26,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225127103] [2023-11-29 03:32:26,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:32:26,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2023-11-29 03:32:26,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:26,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2023-11-29 03:32:26,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2034, Invalid=13218, Unknown=0, NotChecked=0, Total=15252 [2023-11-29 03:32:26,038 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand has 124 states, 124 states have (on average 1.8870967741935485) internal successors, (234), 124 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:32:37,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:32:37,311 INFO L93 Difference]: Finished difference Result 276 states and 299 transitions. [2023-11-29 03:32:37,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-11-29 03:32:37,311 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.8870967741935485) internal successors, (234), 124 states have internal predecessors, (234), 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 80 [2023-11-29 03:32:37,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:32:37,312 INFO L225 Difference]: With dead ends: 276 [2023-11-29 03:32:37,312 INFO L226 Difference]: Without dead ends: 213 [2023-11-29 03:32:37,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12862 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=5587, Invalid=35825, Unknown=0, NotChecked=0, Total=41412 [2023-11-29 03:32:37,314 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 438 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 4186 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 4596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 4186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:32:37,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 565 Invalid, 4596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 4186 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 03:32:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-29 03:32:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 159. [2023-11-29 03:32:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.139240506329114) internal successors, (180), 158 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:32:37,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2023-11-29 03:32:37,557 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 80 [2023-11-29 03:32:37,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:32:37,557 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2023-11-29 03:32:37,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.8870967741935485) internal successors, (234), 124 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:32:37,557 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2023-11-29 03:32:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 03:32:37,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:32:37,558 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:37,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 03:32:37,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:37,759 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:32:37,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:37,759 INFO L85 PathProgramCache]: Analyzing trace with hash -141825091, now seen corresponding path program 22 times [2023-11-29 03:32:37,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:37,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426149715] [2023-11-29 03:32:37,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:37,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 477 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:39,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:39,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426149715] [2023-11-29 03:32:39,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426149715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:32:39,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468997439] [2023-11-29 03:32:39,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:32:39,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:39,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:32:39,888 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:32:39,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 03:32:39,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:32:39,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:32:39,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-29 03:32:39,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:32:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:41,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:32:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:45,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468997439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:32:45,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:32:45,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 46] total 111 [2023-11-29 03:32:45,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389317632] [2023-11-29 03:32:45,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:32:45,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2023-11-29 03:32:45,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:45,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2023-11-29 03:32:45,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1773, Invalid=10437, Unknown=0, NotChecked=0, Total=12210 [2023-11-29 03:32:45,353 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:32:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:32:59,171 INFO L93 Difference]: Finished difference Result 343 states and 368 transitions. [2023-11-29 03:32:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-11-29 03:32:59,172 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 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 84 [2023-11-29 03:32:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:32:59,174 INFO L225 Difference]: With dead ends: 343 [2023-11-29 03:32:59,174 INFO L226 Difference]: Without dead ends: 277 [2023-11-29 03:32:59,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10182 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=5342, Invalid=32878, Unknown=0, NotChecked=0, Total=38220 [2023-11-29 03:32:59,176 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 476 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 4027 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 4496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 4027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:32:59,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 658 Invalid, 4496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 4027 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 03:32:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-11-29 03:32:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 221. [2023-11-29 03:32:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.1136363636363635) internal successors, (245), 220 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:32:59,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 245 transitions. [2023-11-29 03:32:59,502 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 245 transitions. Word has length 84 [2023-11-29 03:32:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:32:59,503 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 245 transitions. [2023-11-29 03:32:59,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:32:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 245 transitions. [2023-11-29 03:32:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-29 03:32:59,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:32:59,504 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:59,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 03:32:59,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:59,704 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:32:59,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:59,705 INFO L85 PathProgramCache]: Analyzing trace with hash -86881311, now seen corresponding path program 23 times [2023-11-29 03:32:59,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:59,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432819114] [2023-11-29 03:32:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:59,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 532 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:33:02,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:33:02,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432819114] [2023-11-29 03:33:02,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432819114] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:33:02,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138428183] [2023-11-29 03:33:02,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:33:02,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:33:02,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:33:02,022 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:33:02,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 03:33:02,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2023-11-29 03:33:02,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:33:02,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-29 03:33:02,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:33:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:33:03,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:33:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:33:07,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138428183] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:33:07,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:33:07,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 48] total 116 [2023-11-29 03:33:07,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912850922] [2023-11-29 03:33:07,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:33:07,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-11-29 03:33:07,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:33:07,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-11-29 03:33:07,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1938, Invalid=11402, Unknown=0, NotChecked=0, Total=13340 [2023-11-29 03:33:07,879 INFO L87 Difference]: Start difference. First operand 221 states and 245 transitions. Second operand has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 116 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:33:23,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:33:23,486 INFO L93 Difference]: Finished difference Result 413 states and 441 transitions. [2023-11-29 03:33:23,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2023-11-29 03:33:23,487 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 116 states have internal predecessors, (238), 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 [2023-11-29 03:33:23,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:33:23,489 INFO L225 Difference]: With dead ends: 413 [2023-11-29 03:33:23,489 INFO L226 Difference]: Without dead ends: 344 [2023-11-29 03:33:23,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11662 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=6035, Invalid=37021, Unknown=0, NotChecked=0, Total=43056 [2023-11-29 03:33:23,491 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 508 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 4783 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 5304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 4783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:33:23,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 810 Invalid, 5304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 4783 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 03:33:23,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-11-29 03:33:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 286. [2023-11-29 03:33:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.1017543859649124) internal successors, (314), 285 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:33:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 314 transitions. [2023-11-29 03:33:23,912 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 314 transitions. Word has length 88 [2023-11-29 03:33:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:33:23,912 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 314 transitions. [2023-11-29 03:33:23,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 116 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:33:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 314 transitions. [2023-11-29 03:33:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 03:33:23,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:33:23,913 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2023-11-29 03:33:23,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 03:33:24,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 03:33:24,113 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:33:24,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:33:24,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1461532989, now seen corresponding path program 24 times [2023-11-29 03:33:24,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:33:24,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165157259] [2023-11-29 03:33:24,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:33:24,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:33:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 590 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:33:26,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:33:26,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165157259] [2023-11-29 03:33:26,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165157259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:33:26,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469210865] [2023-11-29 03:33:26,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:33:26,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:33:26,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:33:26,514 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:33:26,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 03:33:26,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2023-11-29 03:33:26,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:33:26,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 87 conjunts are in the unsatisfiable core [2023-11-29 03:33:26,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:33:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:33:30,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:33:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:33:35,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469210865] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:33:35,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:33:35,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 52, 52] total 148 [2023-11-29 03:33:35,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931006780] [2023-11-29 03:33:35,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:33:35,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2023-11-29 03:33:35,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:33:35,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2023-11-29 03:33:35,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2518, Invalid=19238, Unknown=0, NotChecked=0, Total=21756 [2023-11-29 03:33:35,187 INFO L87 Difference]: Start difference. First operand 286 states and 314 transitions. Second operand has 148 states, 148 states have (on average 1.8310810810810811) internal successors, (271), 148 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:33:48,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:33:48,582 INFO L93 Difference]: Finished difference Result 362 states and 391 transitions. [2023-11-29 03:33:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 03:33:48,582 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.8310810810810811) internal successors, (271), 148 states have internal predecessors, (271), 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 92 [2023-11-29 03:33:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:33:48,584 INFO L225 Difference]: With dead ends: 362 [2023-11-29 03:33:48,584 INFO L226 Difference]: Without dead ends: 290 [2023-11-29 03:33:48,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12409 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=5378, Invalid=41928, Unknown=0, NotChecked=0, Total=47306 [2023-11-29 03:33:48,586 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 134 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 3221 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 3527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 3221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:33:48,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 122 Invalid, 3527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 3221 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 03:33:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-29 03:33:49,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 286. [2023-11-29 03:33:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.0982456140350878) internal successors, (313), 285 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:33:49,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 313 transitions. [2023-11-29 03:33:49,010 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 313 transitions. Word has length 92 [2023-11-29 03:33:49,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:33:49,010 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 313 transitions. [2023-11-29 03:33:49,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.8310810810810811) internal successors, (271), 148 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:33:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 313 transitions. [2023-11-29 03:33:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 03:33:49,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:33:49,011 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2023-11-29 03:33:49,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 03:33:49,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 03:33:49,212 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:33:49,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:33:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1805992221, now seen corresponding path program 25 times [2023-11-29 03:33:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:33:49,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391618933] [2023-11-29 03:33:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:33:49,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:33:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 231 proven. 717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:33:50,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:33:50,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391618933] [2023-11-29 03:33:50,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391618933] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:33:50,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972128531] [2023-11-29 03:33:50,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:33:50,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:33:50,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:33:50,379 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:33:50,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 03:33:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:50,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-29 03:33:50,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:33:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 948 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:33:51,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:33:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 948 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:33:52,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972128531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:33:52,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:33:52,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2023-11-29 03:33:52,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911072357] [2023-11-29 03:33:52,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:33:52,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-11-29 03:33:52,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:33:52,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-11-29 03:33:52,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=7474, Unknown=0, NotChecked=0, Total=8930 [2023-11-29 03:33:52,675 INFO L87 Difference]: Start difference. First operand 286 states and 313 transitions. Second operand has 95 states, 95 states have (on average 1.5052631578947369) internal successors, (143), 95 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:33:55,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:33:55,586 INFO L93 Difference]: Finished difference Result 359 states and 390 transitions. [2023-11-29 03:33:55,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-29 03:33:55,586 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.5052631578947369) internal successors, (143), 95 states have internal predecessors, (143), 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 93 [2023-11-29 03:33:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:33:55,588 INFO L225 Difference]: With dead ends: 359 [2023-11-29 03:33:55,588 INFO L226 Difference]: Without dead ends: 357 [2023-11-29 03:33:55,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 117 SyntacticMatches, 22 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8270 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4941, Invalid=20819, Unknown=0, NotChecked=0, Total=25760 [2023-11-29 03:33:55,589 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 342 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:33:55,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 96 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 03:33:55,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-11-29 03:33:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 97. [2023-11-29 03:33:55,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:33:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2023-11-29 03:33:55,764 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 93 [2023-11-29 03:33:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:33:55,765 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2023-11-29 03:33:55,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.5052631578947369) internal successors, (143), 95 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:33:55,765 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2023-11-29 03:33:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-29 03:33:55,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:33:55,765 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2023-11-29 03:33:55,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-29 03:33:55,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:33:55,966 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:33:55,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:33:55,966 INFO L85 PathProgramCache]: Analyzing trace with hash -736235935, now seen corresponding path program 26 times [2023-11-29 03:33:55,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:33:55,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579597403] [2023-11-29 03:33:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:33:55,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:33:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 651 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:33:58,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:33:58,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579597403] [2023-11-29 03:33:58,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579597403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:33:58,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170728288] [2023-11-29 03:33:58,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:33:58,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:33:58,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:33:58,659 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:33:58,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 03:33:58,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:33:58,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:33:58,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 100 conjunts are in the unsatisfiable core [2023-11-29 03:33:58,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:34:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:34:00,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:34:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:34:05,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170728288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:34:05,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:34:05,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 123 [2023-11-29 03:34:05,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346866451] [2023-11-29 03:34:05,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:34:05,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-11-29 03:34:05,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:34:05,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-11-29 03:34:05,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2163, Invalid=12843, Unknown=0, NotChecked=0, Total=15006 [2023-11-29 03:34:05,165 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 123 states, 123 states have (on average 2.113821138211382) internal successors, (260), 123 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:34:23,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:34:23,024 INFO L93 Difference]: Finished difference Result 267 states and 294 transitions. [2023-11-29 03:34:23,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2023-11-29 03:34:23,024 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.113821138211382) internal successors, (260), 123 states have internal predecessors, (260), 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 96 [2023-11-29 03:34:23,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:34:23,025 INFO L225 Difference]: With dead ends: 267 [2023-11-29 03:34:23,025 INFO L226 Difference]: Without dead ends: 192 [2023-11-29 03:34:23,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12736 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=6618, Invalid=41562, Unknown=0, NotChecked=0, Total=48180 [2023-11-29 03:34:23,027 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 569 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 5194 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 5780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 5194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 03:34:23,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 617 Invalid, 5780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 5194 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 03:34:23,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-29 03:34:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 125. [2023-11-29 03:34:23,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 124 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:34:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2023-11-29 03:34:23,330 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 96 [2023-11-29 03:34:23,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:34:23,330 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2023-11-29 03:34:23,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.113821138211382) internal successors, (260), 123 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:34:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2023-11-29 03:34:23,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-29 03:34:23,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:34:23,331 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2023-11-29 03:34:23,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 03:34:23,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:23,532 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:34:23,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:34:23,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1759353155, now seen corresponding path program 27 times [2023-11-29 03:34:23,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:34:23,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824145256] [2023-11-29 03:34:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:34:23,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:34:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 715 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:34:26,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:34:26,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824145256] [2023-11-29 03:34:26,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824145256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:34:26,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221804150] [2023-11-29 03:34:26,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:34:26,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:26,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:34:26,511 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:34:26,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 03:34:26,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-11-29 03:34:26,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:34:26,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-29 03:34:26,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:34:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:34:30,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:34:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:34:35,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221804150] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:34:35,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:34:35,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 54] total 156 [2023-11-29 03:34:35,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926877548] [2023-11-29 03:34:35,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:34:35,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2023-11-29 03:34:35,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:34:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2023-11-29 03:34:35,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2809, Invalid=21371, Unknown=0, NotChecked=0, Total=24180 [2023-11-29 03:34:35,698 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand has 156 states, 156 states have (on average 1.891025641025641) internal successors, (295), 156 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) [2023-11-29 03:34:51,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:34:51,610 INFO L93 Difference]: Finished difference Result 207 states and 232 transitions. [2023-11-29 03:34:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-29 03:34:51,610 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.891025641025641) internal successors, (295), 156 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) Word has length 100 [2023-11-29 03:34:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:34:51,611 INFO L225 Difference]: With dead ends: 207 [2023-11-29 03:34:51,611 INFO L226 Difference]: Without dead ends: 129 [2023-11-29 03:34:51,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13661 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=5953, Invalid=47177, Unknown=0, NotChecked=0, Total=53130 [2023-11-29 03:34:51,614 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 157 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 2748 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 2748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:34:51,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 108 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 2748 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 03:34:51,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-29 03:34:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2023-11-29 03:34:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 124 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:34:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2023-11-29 03:34:51,923 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 100 [2023-11-29 03:34:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:34:51,924 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2023-11-29 03:34:51,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.891025641025641) internal successors, (295), 156 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) [2023-11-29 03:34:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2023-11-29 03:34:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-29 03:34:51,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:34:51,925 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2023-11-29 03:34:51,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 03:34:52,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:52,125 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:34:52,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:34:52,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1049923229, now seen corresponding path program 28 times [2023-11-29 03:34:52,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:34:52,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136747826] [2023-11-29 03:34:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:34:52,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:34:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1130 backedges. 276 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:34:53,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:34:53,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136747826] [2023-11-29 03:34:53,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136747826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:34:53,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126032748] [2023-11-29 03:34:53,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:34:53,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:53,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:34:53,523 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:34:53,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 03:34:53,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:34:53,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:34:53,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-29 03:34:53,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:34:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1130 backedges. 0 proven. 1130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:34:54,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:34:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1130 backedges. 0 proven. 1130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:34:56,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126032748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:34:56,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:34:56,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 103 [2023-11-29 03:34:56,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477979199] [2023-11-29 03:34:56,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:34:56,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-11-29 03:34:56,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:34:56,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-11-29 03:34:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1707, Invalid=8799, Unknown=0, NotChecked=0, Total=10506 [2023-11-29 03:34:56,227 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 103 states, 103 states have (on average 1.5048543689320388) internal successors, (155), 103 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:34:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:34:59,359 INFO L93 Difference]: Finished difference Result 204 states and 228 transitions. [2023-11-29 03:34:59,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 03:34:59,359 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.5048543689320388) internal successors, (155), 103 states have internal predecessors, (155), 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 101 [2023-11-29 03:34:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:34:59,361 INFO L225 Difference]: With dead ends: 204 [2023-11-29 03:34:59,361 INFO L226 Difference]: Without dead ends: 202 [2023-11-29 03:34:59,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 127 SyntacticMatches, 24 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9838 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5821, Invalid=24629, Unknown=0, NotChecked=0, Total=30450 [2023-11-29 03:34:59,362 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 230 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:34:59,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 116 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 03:34:59,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-29 03:34:59,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 105. [2023-11-29 03:34:59,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:34:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-11-29 03:34:59,558 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 101 [2023-11-29 03:34:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:34:59,558 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-11-29 03:34:59,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.5048543689320388) internal successors, (155), 103 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:34:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-11-29 03:34:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-29 03:34:59,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:34:59,559 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2023-11-29 03:34:59,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 03:34:59,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 03:34:59,759 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:34:59,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:34:59,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1979076383, now seen corresponding path program 29 times [2023-11-29 03:34:59,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:34:59,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258334641] [2023-11-29 03:34:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:34:59,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:34:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 782 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:35:02,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:35:02,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258334641] [2023-11-29 03:35:02,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258334641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:35:02,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217760307] [2023-11-29 03:35:02,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:35:02,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:35:02,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:35:02,875 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:35:02,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 03:35:02,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-11-29 03:35:02,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:35:02,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 121 conjunts are in the unsatisfiable core [2023-11-29 03:35:02,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:35:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:35:05,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:35:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:35:10,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217760307] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:35:10,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:35:10,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 56] total 136 [2023-11-29 03:35:10,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372545350] [2023-11-29 03:35:10,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:35:10,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2023-11-29 03:35:10,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:35:10,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2023-11-29 03:35:10,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2649, Invalid=15711, Unknown=0, NotChecked=0, Total=18360 [2023-11-29 03:35:10,831 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 136 states, 136 states have (on average 2.073529411764706) internal successors, (282), 136 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:35:34,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:35:34,240 INFO L93 Difference]: Finished difference Result 289 states and 318 transitions. [2023-11-29 03:35:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2023-11-29 03:35:34,240 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.073529411764706) internal successors, (282), 136 states have internal predecessors, (282), 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 104 [2023-11-29 03:35:34,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:35:34,242 INFO L225 Difference]: With dead ends: 289 [2023-11-29 03:35:34,242 INFO L226 Difference]: Without dead ends: 208 [2023-11-29 03:35:34,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15495 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=7970, Invalid=49870, Unknown=0, NotChecked=0, Total=57840 [2023-11-29 03:35:34,246 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 640 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 6312 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 6999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 6312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:35:34,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 725 Invalid, 6999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 6312 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-29 03:35:34,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-29 03:35:34,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 135. [2023-11-29 03:35:34,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.2014925373134329) internal successors, (161), 134 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:35:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 161 transitions. [2023-11-29 03:35:34,620 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 161 transitions. Word has length 104 [2023-11-29 03:35:34,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:35:34,620 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 161 transitions. [2023-11-29 03:35:34,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.073529411764706) internal successors, (282), 136 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:35:34,621 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 161 transitions. [2023-11-29 03:35:34,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-29 03:35:34,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:35:34,621 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2023-11-29 03:35:34,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 03:35:34,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 03:35:34,822 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:35:34,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:35:34,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1160999997, now seen corresponding path program 30 times [2023-11-29 03:35:34,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:35:34,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148841620] [2023-11-29 03:35:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:35:34,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:35:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 852 proven. 449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:35:38,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:35:38,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148841620] [2023-11-29 03:35:38,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148841620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:35:38,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227010235] [2023-11-29 03:35:38,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:35:38,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:35:38,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:35:38,088 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:35:38,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 03:35:38,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2023-11-29 03:35:38,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:35:38,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 100 conjunts are in the unsatisfiable core [2023-11-29 03:35:38,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:35:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:35:42,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:35:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:35:49,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227010235] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:35:49,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:35:49,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 60, 60] total 172 [2023-11-29 03:35:49,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242397529] [2023-11-29 03:35:49,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:35:49,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2023-11-29 03:35:49,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:35:49,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2023-11-29 03:35:49,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3378, Invalid=26034, Unknown=0, NotChecked=0, Total=29412 [2023-11-29 03:35:49,607 INFO L87 Difference]: Start difference. First operand 135 states and 161 transitions. Second operand has 172 states, 172 states have (on average 1.8546511627906976) internal successors, (319), 172 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:36:08,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:36:08,784 INFO L93 Difference]: Finished difference Result 223 states and 250 transitions. [2023-11-29 03:36:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-11-29 03:36:08,784 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 172 states have (on average 1.8546511627906976) internal successors, (319), 172 states have internal predecessors, (319), 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 108 [2023-11-29 03:36:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:36:08,785 INFO L225 Difference]: With dead ends: 223 [2023-11-29 03:36:08,785 INFO L226 Difference]: Without dead ends: 139 [2023-11-29 03:36:08,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16860 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=7233, Invalid=57029, Unknown=0, NotChecked=0, Total=64262 [2023-11-29 03:36:08,788 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 194 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 3556 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 4063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 3556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:36:08,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 124 Invalid, 4063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 3556 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 03:36:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-29 03:36:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2023-11-29 03:36:09,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1940298507462686) internal successors, (160), 134 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:36:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 160 transitions. [2023-11-29 03:36:09,156 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 160 transitions. Word has length 108 [2023-11-29 03:36:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:36:09,156 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 160 transitions. [2023-11-29 03:36:09,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 172 states have (on average 1.8546511627906976) internal successors, (319), 172 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:36:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 160 transitions. [2023-11-29 03:36:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-29 03:36:09,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:36:09,157 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2023-11-29 03:36:09,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 03:36:09,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 03:36:09,358 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:36:09,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:36:09,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2089829347, now seen corresponding path program 31 times [2023-11-29 03:36:09,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:36:09,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321780802] [2023-11-29 03:36:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:36:09,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:36:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 325 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:36:10,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:36:10,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321780802] [2023-11-29 03:36:10,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321780802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:36:10,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227073756] [2023-11-29 03:36:10,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:36:10,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:36:10,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:36:10,941 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:36:10,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 03:36:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:11,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 87 conjunts are in the unsatisfiable core [2023-11-29 03:36:11,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:36:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 1328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:36:12,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:36:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 1328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:36:13,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227073756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:36:13,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:36:13,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 111 [2023-11-29 03:36:13,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143384899] [2023-11-29 03:36:13,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:36:13,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2023-11-29 03:36:13,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:36:13,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2023-11-29 03:36:13,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1978, Invalid=10232, Unknown=0, NotChecked=0, Total=12210 [2023-11-29 03:36:13,971 INFO L87 Difference]: Start difference. First operand 135 states and 160 transitions. Second operand has 111 states, 111 states have (on average 1.5045045045045045) internal successors, (167), 111 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:36:17,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:36:17,397 INFO L93 Difference]: Finished difference Result 220 states and 246 transitions. [2023-11-29 03:36:17,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-29 03:36:17,397 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.5045045045045045) internal successors, (167), 111 states have internal predecessors, (167), 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 109 [2023-11-29 03:36:17,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:36:17,398 INFO L225 Difference]: With dead ends: 220 [2023-11-29 03:36:17,398 INFO L226 Difference]: Without dead ends: 218 [2023-11-29 03:36:17,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 137 SyntacticMatches, 26 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11542 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=6773, Invalid=28759, Unknown=0, NotChecked=0, Total=35532 [2023-11-29 03:36:17,400 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 282 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:36:17,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 111 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 03:36:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-29 03:36:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 113. [2023-11-29 03:36:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:36:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2023-11-29 03:36:17,644 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 109 [2023-11-29 03:36:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:36:17,644 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2023-11-29 03:36:17,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.5045045045045045) internal successors, (167), 111 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:36:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2023-11-29 03:36:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-29 03:36:17,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:36:17,645 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2023-11-29 03:36:17,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 03:36:17,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 03:36:17,845 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:36:17,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:36:17,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1744671585, now seen corresponding path program 32 times [2023-11-29 03:36:17,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:36:17,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704813799] [2023-11-29 03:36:17,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:36:17,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:36:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 925 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:36:21,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:36:21,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704813799] [2023-11-29 03:36:21,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704813799] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:36:21,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570798329] [2023-11-29 03:36:21,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:36:21,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:36:21,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:36:21,472 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:36:21,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 03:36:21,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:36:21,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:36:21,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 116 conjunts are in the unsatisfiable core [2023-11-29 03:36:21,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:36:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:36:23,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:36:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:36:29,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570798329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:36:29,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:36:29,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 143 [2023-11-29 03:36:29,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329328485] [2023-11-29 03:36:29,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:36:29,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2023-11-29 03:36:29,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:36:29,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2023-11-29 03:36:29,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2913, Invalid=17393, Unknown=0, NotChecked=0, Total=20306 [2023-11-29 03:36:29,951 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 143 states, 143 states have (on average 2.125874125874126) internal successors, (304), 143 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:36:54,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:36:54,858 INFO L93 Difference]: Finished difference Result 311 states and 342 transitions. [2023-11-29 03:36:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2023-11-29 03:36:54,859 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.125874125874126) internal successors, (304), 143 states have internal predecessors, (304), 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 112 [2023-11-29 03:36:54,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:36:54,860 INFO L225 Difference]: With dead ends: 311 [2023-11-29 03:36:54,860 INFO L226 Difference]: Without dead ends: 224 [2023-11-29 03:36:54,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17332 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=8892, Invalid=56388, Unknown=0, NotChecked=0, Total=65280 [2023-11-29 03:36:54,863 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 715 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 6920 mSolverCounterSat, 795 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 7715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 795 IncrementalHoareTripleChecker+Valid, 6920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-29 03:36:54,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 828 Invalid, 7715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [795 Valid, 6920 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-29 03:36:54,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-29 03:36:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 145. [2023-11-29 03:36:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2013888888888888) internal successors, (173), 144 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:36:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 173 transitions. [2023-11-29 03:36:55,326 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 173 transitions. Word has length 112 [2023-11-29 03:36:55,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:36:55,326 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 173 transitions. [2023-11-29 03:36:55,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.125874125874126) internal successors, (304), 143 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:36:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 173 transitions. [2023-11-29 03:36:55,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-29 03:36:55,327 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:36:55,327 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2023-11-29 03:36:55,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 03:36:55,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 03:36:55,528 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:36:55,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:36:55,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1558733245, now seen corresponding path program 33 times [2023-11-29 03:36:55,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:36:55,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455598449] [2023-11-29 03:36:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:36:55,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:36:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 1001 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:36:59,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:36:59,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455598449] [2023-11-29 03:36:59,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455598449] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:36:59,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280459053] [2023-11-29 03:36:59,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:36:59,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:36:59,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:36:59,168 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:36:59,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 03:36:59,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2023-11-29 03:36:59,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:36:59,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 107 conjunts are in the unsatisfiable core [2023-11-29 03:36:59,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:37:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:37:04,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:37:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:37:11,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280459053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:37:11,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:37:11,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 62, 62] total 180 [2023-11-29 03:37:11,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449605681] [2023-11-29 03:37:11,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:37:11,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 180 states [2023-11-29 03:37:11,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:37:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2023-11-29 03:37:11,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3717, Invalid=28503, Unknown=0, NotChecked=0, Total=32220 [2023-11-29 03:37:11,178 INFO L87 Difference]: Start difference. First operand 145 states and 173 transitions. Second operand has 180 states, 180 states have (on average 1.9055555555555554) internal successors, (343), 180 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:37:33,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:37:33,525 INFO L93 Difference]: Finished difference Result 239 states and 268 transitions. [2023-11-29 03:37:33,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-29 03:37:33,525 INFO L78 Accepts]: Start accepts. Automaton has has 180 states, 180 states have (on average 1.9055555555555554) internal successors, (343), 180 states have internal predecessors, (343), 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 116 [2023-11-29 03:37:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:37:33,526 INFO L225 Difference]: With dead ends: 239 [2023-11-29 03:37:33,526 INFO L226 Difference]: Without dead ends: 149 [2023-11-29 03:37:33,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18343 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=7883, Invalid=63139, Unknown=0, NotChecked=0, Total=71022 [2023-11-29 03:37:33,529 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 154 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 3709 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 4146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 3709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:37:33,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 120 Invalid, 4146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 3709 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 03:37:33,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-29 03:37:33,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2023-11-29 03:37:33,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 144 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:37:33,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 172 transitions. [2023-11-29 03:37:33,984 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 172 transitions. Word has length 116 [2023-11-29 03:37:33,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:37:33,984 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 172 transitions. [2023-11-29 03:37:33,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 180 states, 180 states have (on average 1.9055555555555554) internal successors, (343), 180 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:37:33,984 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 172 transitions. [2023-11-29 03:37:33,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-29 03:37:33,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:37:33,985 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2023-11-29 03:37:33,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 03:37:34,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 03:37:34,185 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:37:34,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:37:34,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1439615389, now seen corresponding path program 34 times [2023-11-29 03:37:34,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:37:34,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163627343] [2023-11-29 03:37:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:37:34,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:37:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 378 proven. 1164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:37:36,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:37:36,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163627343] [2023-11-29 03:37:36,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163627343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:37:36,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487959367] [2023-11-29 03:37:36,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:37:36,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:37:36,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:37:36,010 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:37:36,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 03:37:36,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:37:36,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:37:36,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-29 03:37:36,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:37:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 0 proven. 1542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:37:37,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:37:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 0 proven. 1542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:37:39,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487959367] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:37:39,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:37:39,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 119 [2023-11-29 03:37:39,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653013238] [2023-11-29 03:37:39,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:37:39,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-11-29 03:37:39,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:37:39,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-11-29 03:37:39,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2269, Invalid=11773, Unknown=0, NotChecked=0, Total=14042 [2023-11-29 03:37:39,277 INFO L87 Difference]: Start difference. First operand 145 states and 172 transitions. Second operand has 119 states, 119 states have (on average 1.504201680672269) internal successors, (179), 119 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:37:43,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:37:43,448 INFO L93 Difference]: Finished difference Result 236 states and 264 transitions. [2023-11-29 03:37:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-11-29 03:37:43,449 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.504201680672269) internal successors, (179), 119 states have internal predecessors, (179), 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 117 [2023-11-29 03:37:43,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:37:43,450 INFO L225 Difference]: With dead ends: 236 [2023-11-29 03:37:43,450 INFO L226 Difference]: Without dead ends: 234 [2023-11-29 03:37:43,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 147 SyntacticMatches, 28 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13382 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=7797, Invalid=33209, Unknown=0, NotChecked=0, Total=41006 [2023-11-29 03:37:43,452 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 260 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:37:43,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 124 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 03:37:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-29 03:37:43,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 121. [2023-11-29 03:37:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:37:43,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2023-11-29 03:37:43,734 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 117 [2023-11-29 03:37:43,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:37:43,735 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2023-11-29 03:37:43,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.504201680672269) internal successors, (179), 119 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:37:43,735 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2023-11-29 03:37:43,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-29 03:37:43,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:37:43,735 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2023-11-29 03:37:43,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 03:37:43,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 03:37:43,936 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:37:43,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:37:43,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1956538911, now seen corresponding path program 35 times [2023-11-29 03:37:43,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:37:43,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017662786] [2023-11-29 03:37:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:37:43,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:37:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1080 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:37:47,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:37:47,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017662786] [2023-11-29 03:37:47,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017662786] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:37:47,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483712383] [2023-11-29 03:37:47,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:37:47,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:37:47,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:37:47,963 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:37:47,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 03:37:48,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2023-11-29 03:37:48,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:37:48,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 134 conjunts are in the unsatisfiable core [2023-11-29 03:37:48,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:37:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:37:50,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:37:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:37:57,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483712383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:37:57,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:37:57,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 64] total 156 [2023-11-29 03:37:57,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821985315] [2023-11-29 03:37:57,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:37:57,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2023-11-29 03:37:57,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:37:57,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2023-11-29 03:37:57,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3471, Invalid=20709, Unknown=0, NotChecked=0, Total=24180 [2023-11-29 03:37:57,894 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 156 states, 156 states have (on average 2.08974358974359) internal successors, (326), 156 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:38:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:38:28,885 INFO L93 Difference]: Finished difference Result 333 states and 366 transitions. [2023-11-29 03:38:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2023-11-29 03:38:28,886 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 2.08974358974359) internal successors, (326), 156 states have internal predecessors, (326), 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 120 [2023-11-29 03:38:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:38:28,887 INFO L225 Difference]: With dead ends: 333 [2023-11-29 03:38:28,887 INFO L226 Difference]: Without dead ends: 240 [2023-11-29 03:38:28,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20527 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=10448, Invalid=66004, Unknown=0, NotChecked=0, Total=76452 [2023-11-29 03:38:28,892 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 801 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 8158 mSolverCounterSat, 933 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 9091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 933 IncrementalHoareTripleChecker+Valid, 8158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:38:28,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 918 Invalid, 9091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [933 Valid, 8158 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-29 03:38:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-29 03:38:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 155. [2023-11-29 03:38:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.2012987012987013) internal successors, (185), 154 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:38:29,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2023-11-29 03:38:29,437 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 120 [2023-11-29 03:38:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:38:29,437 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2023-11-29 03:38:29,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 2.08974358974359) internal successors, (326), 156 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:38:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2023-11-29 03:38:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 03:38:29,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:38:29,438 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2023-11-29 03:38:29,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 03:38:29,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 03:38:29,638 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:38:29,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:38:29,638 INFO L85 PathProgramCache]: Analyzing trace with hash -942067907, now seen corresponding path program 36 times [2023-11-29 03:38:29,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:38:29,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719428250] [2023-11-29 03:38:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:38:29,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:38:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 1162 proven. 579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:38:33,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:38:33,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719428250] [2023-11-29 03:38:33,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719428250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:38:33,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705713486] [2023-11-29 03:38:33,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:38:33,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:38:33,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:38:33,905 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:38:33,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 03:38:34,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2023-11-29 03:38:34,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:38:34,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 115 conjunts are in the unsatisfiable core [2023-11-29 03:38:34,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:38:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:38:39,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:38:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:38:48,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705713486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:38:48,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:38:48,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 68, 68] total 196 [2023-11-29 03:38:48,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110939603] [2023-11-29 03:38:48,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:38:48,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2023-11-29 03:38:48,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:38:48,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2023-11-29 03:38:48,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4366, Invalid=33854, Unknown=0, NotChecked=0, Total=38220 [2023-11-29 03:38:48,269 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand has 196 states, 196 states have (on average 1.8724489795918366) internal successors, (367), 196 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:39:15,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:39:15,038 INFO L93 Difference]: Finished difference Result 255 states and 286 transitions. [2023-11-29 03:39:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-11-29 03:39:15,039 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 1.8724489795918366) internal successors, (367), 196 states have internal predecessors, (367), 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 124 [2023-11-29 03:39:15,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:39:15,039 INFO L225 Difference]: With dead ends: 255 [2023-11-29 03:39:15,040 INFO L226 Difference]: Without dead ends: 159 [2023-11-29 03:39:15,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22034 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=9339, Invalid=74471, Unknown=0, NotChecked=0, Total=83810 [2023-11-29 03:39:15,043 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 218 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 4233 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 4870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 4233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:39:15,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 136 Invalid, 4870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 4233 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 03:39:15,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-29 03:39:15,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2023-11-29 03:39:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.1948051948051948) internal successors, (184), 154 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:39:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2023-11-29 03:39:15,577 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 124 [2023-11-29 03:39:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:39:15,577 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2023-11-29 03:39:15,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 1.8724489795918366) internal successors, (367), 196 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:39:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2023-11-29 03:39:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-29 03:39:15,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:39:15,578 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2023-11-29 03:39:15,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 03:39:15,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:39:15,779 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:39:15,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:39:15,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1085688035, now seen corresponding path program 37 times [2023-11-29 03:39:15,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:39:15,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115944071] [2023-11-29 03:39:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:39:15,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:39:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 435 proven. 1337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:39:17,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:39:17,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115944071] [2023-11-29 03:39:17,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115944071] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:39:17,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095721215] [2023-11-29 03:39:17,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:39:17,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:39:17,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:39:17,828 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:39:17,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 03:39:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:17,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 99 conjunts are in the unsatisfiable core [2023-11-29 03:39:17,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:39:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:39:19,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:39:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:39:21,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095721215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:39:21,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:39:21,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 127 [2023-11-29 03:39:21,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004043926] [2023-11-29 03:39:21,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:39:21,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2023-11-29 03:39:21,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:39:21,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2023-11-29 03:39:21,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2580, Invalid=13422, Unknown=0, NotChecked=0, Total=16002 [2023-11-29 03:39:21,625 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand has 127 states, 127 states have (on average 1.5039370078740157) internal successors, (191), 127 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:39:26,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:39:26,017 INFO L93 Difference]: Finished difference Result 252 states and 282 transitions. [2023-11-29 03:39:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-29 03:39:26,017 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.5039370078740157) internal successors, (191), 127 states have internal predecessors, (191), 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 125 [2023-11-29 03:39:26,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:39:26,019 INFO L225 Difference]: With dead ends: 252 [2023-11-29 03:39:26,019 INFO L226 Difference]: Without dead ends: 250 [2023-11-29 03:39:26,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 157 SyntacticMatches, 30 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15358 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=8893, Invalid=37979, Unknown=0, NotChecked=0, Total=46872 [2023-11-29 03:39:26,021 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 310 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 03:39:26,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 133 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 03:39:26,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-11-29 03:39:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 129. [2023-11-29 03:39:26,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:39:26,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-11-29 03:39:26,343 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 125 [2023-11-29 03:39:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:39:26,344 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-11-29 03:39:26,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.5039370078740157) internal successors, (191), 127 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:39:26,344 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-11-29 03:39:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-29 03:39:26,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:39:26,345 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2023-11-29 03:39:26,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 03:39:26,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:39:26,545 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:39:26,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:39:26,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1671280737, now seen corresponding path program 38 times [2023-11-29 03:39:26,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:39:26,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911856316] [2023-11-29 03:39:26,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:39:26,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:39:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 1247 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:39:31,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:39:31,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911856316] [2023-11-29 03:39:31,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911856316] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:39:31,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640157652] [2023-11-29 03:39:31,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:39:31,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:39:31,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:39:31,201 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:39:31,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 03:39:31,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:39:31,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:39:31,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 132 conjunts are in the unsatisfiable core [2023-11-29 03:39:31,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:39:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:39:34,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:39:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:39:41,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640157652] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:39:41,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:39:41,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 163 [2023-11-29 03:39:41,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192263484] [2023-11-29 03:39:41,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:39:41,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2023-11-29 03:39:41,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:39:41,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2023-11-29 03:39:41,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3775, Invalid=22631, Unknown=0, NotChecked=0, Total=26406 [2023-11-29 03:39:41,799 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 163 states, 163 states have (on average 2.1349693251533743) internal successors, (348), 163 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:40:15,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:40:15,860 INFO L93 Difference]: Finished difference Result 355 states and 390 transitions. [2023-11-29 03:40:15,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-11-29 03:40:15,861 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 2.1349693251533743) internal successors, (348), 163 states have internal predecessors, (348), 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 128 [2023-11-29 03:40:15,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:40:15,862 INFO L225 Difference]: With dead ends: 355 [2023-11-29 03:40:15,862 INFO L226 Difference]: Without dead ends: 256 [2023-11-29 03:40:15,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22632 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=11502, Invalid=73470, Unknown=0, NotChecked=0, Total=84972 [2023-11-29 03:40:15,866 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 885 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 9058 mSolverCounterSat, 1037 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 10095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1037 IncrementalHoareTripleChecker+Valid, 9058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:40:15,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 1078 Invalid, 10095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1037 Valid, 9058 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-29 03:40:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-11-29 03:40:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 165. [2023-11-29 03:40:16,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.201219512195122) internal successors, (197), 164 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) [2023-11-29 03:40:16,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 197 transitions. [2023-11-29 03:40:16,543 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 197 transitions. Word has length 128 [2023-11-29 03:40:16,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:40:16,544 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 197 transitions. [2023-11-29 03:40:16,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 2.1349693251533743) internal successors, (348), 163 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:40:16,544 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 197 transitions. [2023-11-29 03:40:16,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-29 03:40:16,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:40:16,545 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2023-11-29 03:40:16,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-29 03:40:16,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:40:16,745 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:40:16,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:40:16,746 INFO L85 PathProgramCache]: Analyzing trace with hash -576856899, now seen corresponding path program 39 times [2023-11-29 03:40:16,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:40:16,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276759920] [2023-11-29 03:40:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:40:16,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:40:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1335 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:40:21,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:40:21,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276759920] [2023-11-29 03:40:21,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276759920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:40:21,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571166995] [2023-11-29 03:40:21,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:40:21,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:40:21,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:40:21,494 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:40:21,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 03:40:21,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2023-11-29 03:40:21,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:40:21,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 120 conjunts are in the unsatisfiable core [2023-11-29 03:40:21,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:40:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:40:27,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:40:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:40:36,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571166995] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:40:36,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:40:36,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 70, 70] total 204 [2023-11-29 03:40:36,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208145713] [2023-11-29 03:40:36,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:40:36,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2023-11-29 03:40:36,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:40:36,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2023-11-29 03:40:36,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=36659, Unknown=0, NotChecked=0, Total=41412 [2023-11-29 03:40:36,458 INFO L87 Difference]: Start difference. First operand 165 states and 197 transitions. Second operand has 204 states, 204 states have (on average 1.9166666666666667) internal successors, (391), 204 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:41:07,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:41:07,962 INFO L93 Difference]: Finished difference Result 271 states and 304 transitions. [2023-11-29 03:41:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-29 03:41:07,963 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 204 states have (on average 1.9166666666666667) internal successors, (391), 204 states have internal predecessors, (391), 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 132 [2023-11-29 03:41:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:41:07,964 INFO L225 Difference]: With dead ends: 271 [2023-11-29 03:41:07,964 INFO L226 Difference]: Without dead ends: 169 [2023-11-29 03:41:07,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23713 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=10085, Invalid=81421, Unknown=0, NotChecked=0, Total=91506 [2023-11-29 03:41:07,968 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 175 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 4681 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 5244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 4681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:41:07,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 135 Invalid, 5244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 4681 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-29 03:41:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-29 03:41:08,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2023-11-29 03:41:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1951219512195121) internal successors, (196), 164 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:41:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 196 transitions. [2023-11-29 03:41:08,572 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 196 transitions. Word has length 132 [2023-11-29 03:41:08,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:41:08,572 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 196 transitions. [2023-11-29 03:41:08,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 204 states have (on average 1.9166666666666667) internal successors, (391), 204 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:41:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 196 transitions. [2023-11-29 03:41:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-29 03:41:08,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:41:08,573 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2023-11-29 03:41:08,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-29 03:41:08,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:41:08,773 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:41:08,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:08,774 INFO L85 PathProgramCache]: Analyzing trace with hash 930645149, now seen corresponding path program 40 times [2023-11-29 03:41:08,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:08,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653186496] [2023-11-29 03:41:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:08,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 496 proven. 1522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:11,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:11,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653186496] [2023-11-29 03:41:11,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653186496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:41:11,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760258212] [2023-11-29 03:41:11,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:41:11,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:41:11,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:41:11,132 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:41:11,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 03:41:11,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:41:11,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:41:11,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 105 conjunts are in the unsatisfiable core [2023-11-29 03:41:11,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:41:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 0 proven. 2018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:13,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:41:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 0 proven. 2018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:15,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760258212] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:41:15,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:41:15,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 135 [2023-11-29 03:41:15,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007752598] [2023-11-29 03:41:15,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:41:15,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2023-11-29 03:41:15,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2023-11-29 03:41:15,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2911, Invalid=15179, Unknown=0, NotChecked=0, Total=18090 [2023-11-29 03:41:15,460 INFO L87 Difference]: Start difference. First operand 165 states and 196 transitions. Second operand has 135 states, 135 states have (on average 1.5037037037037038) internal successors, (203), 135 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) [2023-11-29 03:41:20,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:41:20,515 INFO L93 Difference]: Finished difference Result 268 states and 300 transitions. [2023-11-29 03:41:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-11-29 03:41:20,515 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.5037037037037038) internal successors, (203), 135 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 133 [2023-11-29 03:41:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:41:20,516 INFO L225 Difference]: With dead ends: 268 [2023-11-29 03:41:20,516 INFO L226 Difference]: Without dead ends: 266 [2023-11-29 03:41:20,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 167 SyntacticMatches, 32 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17470 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=10061, Invalid=43069, Unknown=0, NotChecked=0, Total=53130 [2023-11-29 03:41:20,519 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 334 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1914 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 03:41:20,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 129 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1914 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 03:41:20,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-11-29 03:41:20,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 137. [2023-11-29 03:41:20,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:41:20,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2023-11-29 03:41:20,873 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 133 [2023-11-29 03:41:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:41:20,874 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2023-11-29 03:41:20,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.5037037037037038) internal successors, (203), 135 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) [2023-11-29 03:41:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2023-11-29 03:41:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-29 03:41:20,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:41:20,875 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2023-11-29 03:41:20,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-29 03:41:21,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:41:21,075 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:41:21,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:21,075 INFO L85 PathProgramCache]: Analyzing trace with hash 840563425, now seen corresponding path program 41 times [2023-11-29 03:41:21,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:21,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543971363] [2023-11-29 03:41:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:21,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1426 proven. 687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:25,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:25,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543971363] [2023-11-29 03:41:25,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543971363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:41:25,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861981783] [2023-11-29 03:41:25,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:41:25,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:41:25,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:41:25,973 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:41:25,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 03:41:26,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2023-11-29 03:41:26,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:41:26,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 151 conjunts are in the unsatisfiable core [2023-11-29 03:41:26,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:41:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:29,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:41:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:38,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861981783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:41:38,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:41:38,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 72, 74] total 179 [2023-11-29 03:41:38,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709873458] [2023-11-29 03:41:38,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:41:38,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2023-11-29 03:41:38,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:38,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2023-11-29 03:41:38,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4579, Invalid=27283, Unknown=0, NotChecked=0, Total=31862 [2023-11-29 03:41:38,856 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 179 states, 179 states have (on average 2.0670391061452515) internal successors, (370), 179 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:18,425 INFO L93 Difference]: Finished difference Result 377 states and 414 transitions. [2023-11-29 03:42:18,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2023-11-29 03:42:18,425 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 2.0670391061452515) internal successors, (370), 179 states have internal predecessors, (370), 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 136 [2023-11-29 03:42:18,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:18,426 INFO L225 Difference]: With dead ends: 377 [2023-11-29 03:42:18,426 INFO L226 Difference]: Without dead ends: 272 [2023-11-29 03:42:18,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26968 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=13586, Invalid=85954, Unknown=0, NotChecked=0, Total=99540 [2023-11-29 03:42:18,430 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 976 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 10788 mSolverCounterSat, 1191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 11979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1191 IncrementalHoareTripleChecker+Valid, 10788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:18,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1221 Invalid, 11979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1191 Valid, 10788 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-11-29 03:42:18,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-11-29 03:42:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 175. [2023-11-29 03:42:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.2011494252873562) internal successors, (209), 174 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 209 transitions. [2023-11-29 03:42:19,172 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 209 transitions. Word has length 136 [2023-11-29 03:42:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:19,172 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 209 transitions. [2023-11-29 03:42:19,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 2.0670391061452515) internal successors, (370), 179 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 209 transitions. [2023-11-29 03:42:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-29 03:42:19,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:19,173 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:19,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-29 03:42:19,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:19,373 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:19,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:19,374 INFO L85 PathProgramCache]: Analyzing trace with hash -473011651, now seen corresponding path program 42 times [2023-11-29 03:42:19,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:19,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327114484] [2023-11-29 03:42:19,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:19,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1520 proven. 725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:42:24,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:24,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327114484] [2023-11-29 03:42:24,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327114484] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:24,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428977058] [2023-11-29 03:42:24,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:42:24,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:24,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:24,745 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:24,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 03:42:24,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2023-11-29 03:42:24,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:24,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 127 conjunts are in the unsatisfiable core [2023-11-29 03:42:24,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:42:31,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:42:42,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428977058] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:42,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:42,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 76, 76] total 220 [2023-11-29 03:42:42,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488353642] [2023-11-29 03:42:42,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:42,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 220 states [2023-11-29 03:42:42,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:42,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2023-11-29 03:42:42,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5482, Invalid=42698, Unknown=0, NotChecked=0, Total=48180 [2023-11-29 03:42:42,757 INFO L87 Difference]: Start difference. First operand 175 states and 209 transitions. Second operand has 220 states, 220 states have (on average 1.8863636363636365) internal successors, (415), 220 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:19,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:43:19,263 INFO L93 Difference]: Finished difference Result 287 states and 322 transitions. [2023-11-29 03:43:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-11-29 03:43:19,264 INFO L78 Accepts]: Start accepts. Automaton has has 220 states, 220 states have (on average 1.8863636363636365) internal successors, (415), 220 states have internal predecessors, (415), 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 140 [2023-11-29 03:43:19,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:43:19,264 INFO L225 Difference]: With dead ends: 287 [2023-11-29 03:43:19,264 INFO L226 Difference]: Without dead ends: 179 [2023-11-29 03:43:19,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27981 ImplicationChecksByTransitivity, 51.1s TimeCoverageRelationStatistics Valid=11718, Invalid=94232, Unknown=0, NotChecked=0, Total=105950 [2023-11-29 03:43:19,268 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 177 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 5234 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 5929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 5234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:43:19,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 143 Invalid, 5929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 5234 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-29 03:43:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-29 03:43:19,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2023-11-29 03:43:19,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.1954022988505748) internal successors, (208), 174 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 208 transitions. [2023-11-29 03:43:19,985 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 208 transitions. Word has length 140 [2023-11-29 03:43:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:43:19,985 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 208 transitions. [2023-11-29 03:43:19,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 220 states, 220 states have (on average 1.8863636363636365) internal successors, (415), 220 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:19,986 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 208 transitions. [2023-11-29 03:43:19,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-29 03:43:19,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:43:19,986 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2023-11-29 03:43:19,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 03:43:20,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 03:43:20,187 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:43:20,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:43:20,187 INFO L85 PathProgramCache]: Analyzing trace with hash 603140637, now seen corresponding path program 43 times [2023-11-29 03:43:20,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:43:20,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579249865] [2023-11-29 03:43:20,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:43:20,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:43:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:43:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 561 proven. 1719 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:43:22,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:43:22,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579249865] [2023-11-29 03:43:22,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579249865] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:43:22,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987909027] [2023-11-29 03:43:22,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:43:22,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:43:22,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:43:22,963 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:43:22,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 03:43:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:43:23,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 111 conjunts are in the unsatisfiable core [2023-11-29 03:43:23,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:43:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:43:25,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:43:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:43:27,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987909027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:43:27,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:43:27,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 143 [2023-11-29 03:43:27,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887057988] [2023-11-29 03:43:27,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:43:27,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2023-11-29 03:43:27,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:43:27,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2023-11-29 03:43:27,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3262, Invalid=17044, Unknown=0, NotChecked=0, Total=20306 [2023-11-29 03:43:27,884 INFO L87 Difference]: Start difference. First operand 175 states and 208 transitions. Second operand has 143 states, 143 states have (on average 1.5034965034965035) internal successors, (215), 143 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:43:33,826 INFO L93 Difference]: Finished difference Result 284 states and 318 transitions. [2023-11-29 03:43:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-29 03:43:33,826 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.5034965034965035) internal successors, (215), 143 states have internal predecessors, (215), 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 141 [2023-11-29 03:43:33,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:43:33,827 INFO L225 Difference]: With dead ends: 284 [2023-11-29 03:43:33,828 INFO L226 Difference]: Without dead ends: 282 [2023-11-29 03:43:33,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 177 SyntacticMatches, 34 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19718 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=11301, Invalid=48479, Unknown=0, NotChecked=0, Total=59780 [2023-11-29 03:43:33,830 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 308 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 03:43:33,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 141 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 03:43:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-11-29 03:43:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 145. [2023-11-29 03:43:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2023-11-29 03:43:34,283 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 141 [2023-11-29 03:43:34,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:43:34,283 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2023-11-29 03:43:34,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.5034965034965035) internal successors, (215), 143 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2023-11-29 03:43:34,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-29 03:43:34,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:43:34,284 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2023-11-29 03:43:34,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 03:43:34,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:43:34,484 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:43:34,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:43:34,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1975624351, now seen corresponding path program 44 times [2023-11-29 03:43:34,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:43:34,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454122431] [2023-11-29 03:43:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:43:34,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:43:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:43:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1617 proven. 764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:43:40,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:43:40,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454122431] [2023-11-29 03:43:40,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454122431] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:43:40,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170731647] [2023-11-29 03:43:40,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:43:40,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:43:40,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:43:40,490 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:43:40,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b24f4855-6cdd-40eb-9133-75ccac6c12a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 03:43:40,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:43:40,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:43:40,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 148 conjunts are in the unsatisfiable core [2023-11-29 03:43:40,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:43:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:43:44,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:43:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:43:54,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170731647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:43:54,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:43:54,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 183 [2023-11-29 03:43:54,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980690881] [2023-11-29 03:43:54,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:43:54,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2023-11-29 03:43:54,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:43:54,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2023-11-29 03:43:54,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4749, Invalid=28557, Unknown=0, NotChecked=0, Total=33306 [2023-11-29 03:43:54,119 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 183 states, 183 states have (on average 2.1420765027322406) internal successors, (392), 183 states have internal predecessors, (392), 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)