./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_shadowinit.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_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/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_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/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_2b37dc6b-249e-46d8-ac2c-713c30212885/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 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:36:38,976 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:36:39,047 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:36:39,053 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:36:39,053 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:36:39,082 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:36:39,083 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:36:39,083 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:36:39,084 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:36:39,085 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:36:39,085 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:36:39,086 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:36:39,087 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:36:39,087 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:36:39,088 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:36:39,088 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:36:39,089 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:36:39,089 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:36:39,090 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:36:39,091 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:36:39,091 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:36:39,092 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:36:39,092 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:36:39,093 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:36:39,093 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:36:39,094 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:36:39,094 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:36:39,095 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:36:39,095 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:36:39,095 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:36:39,096 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:36:39,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:36:39,097 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:36:39,097 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:36:39,097 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:36:39,097 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:36:39,097 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:36:39,098 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:36:39,098 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:36:39,098 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:36:39,098 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:36:39,099 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:36:39,099 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_2b37dc6b-249e-46d8-ac2c-713c30212885/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 [2023-11-29 01:36:39,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:36:39,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:36:39,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:36:39,353 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:36:39,353 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:36:39,355 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2023-11-29 01:36:42,135 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:36:42,347 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:36:42,348 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2023-11-29 01:36:42,354 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/data/ab8f0e007/eeb30b17f5144782b11d578da080cff7/FLAGb35101d97 [2023-11-29 01:36:42,369 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/data/ab8f0e007/eeb30b17f5144782b11d578da080cff7 [2023-11-29 01:36:42,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:36:42,373 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:36:42,375 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:36:42,375 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:36:42,380 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:36:42,381 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:36:42" (1/1) ... [2023-11-29 01:36:42,382 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1008239a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42, skipping insertion in model container [2023-11-29 01:36:42,382 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:36:42" (1/1) ... [2023-11-29 01:36:42,401 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:36:42,525 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_2b37dc6b-249e-46d8-ac2c-713c30212885/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i[809,822] [2023-11-29 01:36:42,538 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:36:42,548 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:36:42,562 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_2b37dc6b-249e-46d8-ac2c-713c30212885/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i[809,822] [2023-11-29 01:36:42,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:36:42,584 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:36:42,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42 WrapperNode [2023-11-29 01:36:42,585 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:36:42,586 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:36:42,586 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:36:42,586 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:36:42,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42" (1/1) ... [2023-11-29 01:36:42,599 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42" (1/1) ... [2023-11-29 01:36:42,616 INFO L138 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2023-11-29 01:36:42,617 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:36:42,617 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:36:42,618 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:36:42,618 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:36:42,626 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42" (1/1) ... [2023-11-29 01:36:42,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42" (1/1) ... [2023-11-29 01:36:42,628 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42" (1/1) ... [2023-11-29 01:36:42,641 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-29 01:36:42,642 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42" (1/1) ... [2023-11-29 01:36:42,642 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42" (1/1) ... [2023-11-29 01:36:42,647 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42" (1/1) ... [2023-11-29 01:36:42,650 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42" (1/1) ... [2023-11-29 01:36:42,652 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42" (1/1) ... [2023-11-29 01:36:42,653 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42" (1/1) ... [2023-11-29 01:36:42,655 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:36:42,656 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:36:42,656 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:36:42,656 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:36:42,657 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42" (1/1) ... [2023-11-29 01:36:42,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:36:42,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:42,689 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:36:42,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:36:42,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:36:42,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:36:42,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:36:42,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:36:42,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:36:42,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:36:42,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:36:42,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:36:42,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:36:42,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:36:42,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:36:42,804 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:36:42,807 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:36:42,899 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:36:42,922 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:36:42,922 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 01:36:42,923 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:36:42 BoogieIcfgContainer [2023-11-29 01:36:42,923 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:36:42,926 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:36:42,926 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:36:42,929 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:36:42,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:36:42" (1/3) ... [2023-11-29 01:36:42,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290e3612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:36:42, skipping insertion in model container [2023-11-29 01:36:42,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:36:42" (2/3) ... [2023-11-29 01:36:42,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290e3612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:36:42, skipping insertion in model container [2023-11-29 01:36:42,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:36:42" (3/3) ... [2023-11-29 01:36:42,932 INFO L112 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2023-11-29 01:36:42,952 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:36:42,953 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:36:42,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:36:42,997 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;@7e781660, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:36:42,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:36:43,000 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 01:36:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 01:36:43,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:43,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:43,006 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:43,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:43,010 INFO L85 PathProgramCache]: Analyzing trace with hash -968160633, now seen corresponding path program 1 times [2023-11-29 01:36:43,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:43,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055470622] [2023-11-29 01:36:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:43,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:43,177 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 01:36:43,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:43,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055470622] [2023-11-29 01:36:43,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055470622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:36:43,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:36:43,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:36:43,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28842677] [2023-11-29 01:36:43,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:36:43,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 01:36:43,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:43,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 01:36:43,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:36:43,220 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 01:36:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:43,242 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2023-11-29 01:36:43,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 01:36:43,245 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 01:36:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:43,252 INFO L225 Difference]: With dead ends: 21 [2023-11-29 01:36:43,252 INFO L226 Difference]: Without dead ends: 9 [2023-11-29 01:36:43,255 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 01:36:43,259 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 01:36:43,260 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 01:36:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-29 01:36:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-11-29 01:36:43,286 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 01:36:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2023-11-29 01:36:43,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2023-11-29 01:36:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:43,288 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2023-11-29 01:36:43,289 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 01:36:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2023-11-29 01:36:43,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 01:36:43,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:43,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:43,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:36:43,290 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:43,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:43,291 INFO L85 PathProgramCache]: Analyzing trace with hash -971854717, now seen corresponding path program 1 times [2023-11-29 01:36:43,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:43,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009443472] [2023-11-29 01:36:43,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:43,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:43,403 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 01:36:43,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:43,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009443472] [2023-11-29 01:36:43,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009443472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:36:43,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:36:43,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:36:43,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292818292] [2023-11-29 01:36:43,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:36:43,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:36:43,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:43,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:36:43,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:36:43,407 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 01:36:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:43,426 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-11-29 01:36:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:36:43,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 01:36:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:43,428 INFO L225 Difference]: With dead ends: 16 [2023-11-29 01:36:43,428 INFO L226 Difference]: Without dead ends: 10 [2023-11-29 01:36:43,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:36:43,430 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:43,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:36:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-29 01:36:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-29 01:36:43,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 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 01:36:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-11-29 01:36:43,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2023-11-29 01:36:43,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:43,436 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-11-29 01:36:43,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 01:36:43,437 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-11-29 01:36:43,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 01:36:43,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:43,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:43,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:36:43,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:43,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:43,439 INFO L85 PathProgramCache]: Analyzing trace with hash -11279011, now seen corresponding path program 1 times [2023-11-29 01:36:43,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:43,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248413322] [2023-11-29 01:36:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:43,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:43,793 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 01:36:43,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:43,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248413322] [2023-11-29 01:36:43,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248413322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:43,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039703109] [2023-11-29 01:36:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:43,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:43,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:43,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:43,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:36:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:43,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:36:43,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:43,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:36:44,010 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 01:36:44,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:44,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-29 01:36:44,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-29 01:36:44,072 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 01:36:44,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039703109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:44,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:36:44,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-29 01:36:44,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520714333] [2023-11-29 01:36:44,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:44,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:36:44,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:44,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:36:44,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:36:44,075 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 01:36:44,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:44,151 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2023-11-29 01:36:44,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:36:44,152 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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) Word has length 8 [2023-11-29 01:36:44,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:44,152 INFO L225 Difference]: With dead ends: 15 [2023-11-29 01:36:44,153 INFO L226 Difference]: Without dead ends: 13 [2023-11-29 01:36:44,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:36:44,155 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:44,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 23 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:36:44,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-29 01:36:44,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-11-29 01:36:44,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 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 01:36:44,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-11-29 01:36:44,160 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2023-11-29 01:36:44,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:44,160 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-11-29 01:36:44,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 01:36:44,161 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-11-29 01:36:44,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 01:36:44,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:44,161 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:44,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:36:44,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:44,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:44,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:44,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1000774144, now seen corresponding path program 1 times [2023-11-29 01:36:44,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:44,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93507954] [2023-11-29 01:36:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:44,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:44,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:44,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93507954] [2023-11-29 01:36:44,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93507954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:44,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089155418] [2023-11-29 01:36:44,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:44,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:44,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:44,465 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:44,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:36:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:44,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:36:44,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:44,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:44,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089155418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:44,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:36:44,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 01:36:44,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926573627] [2023-11-29 01:36:44,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:44,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:36:44,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:44,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:36:44,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:36:44,631 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 01:36:44,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:44,693 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-11-29 01:36:44,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:36:44,694 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) Word has length 11 [2023-11-29 01:36:44,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:44,694 INFO L225 Difference]: With dead ends: 29 [2023-11-29 01:36:44,694 INFO L226 Difference]: Without dead ends: 19 [2023-11-29 01:36:44,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:36:44,696 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:44,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:36:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-29 01:36:44,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2023-11-29 01:36:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 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 01:36:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-29 01:36:44,701 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2023-11-29 01:36:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:44,702 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-29 01:36:44,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 01:36:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-29 01:36:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 01:36:44,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:44,703 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:44,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:36:44,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:44,904 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:44,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:44,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1774280230, now seen corresponding path program 2 times [2023-11-29 01:36:44,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:44,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015237039] [2023-11-29 01:36:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:44,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:45,135 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 01:36:45,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:45,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015237039] [2023-11-29 01:36:45,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015237039] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:45,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666428616] [2023-11-29 01:36:45,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:36:45,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:45,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:45,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:45,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:36:45,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:36:45,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:36:45,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:36:45,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:45,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:36:45,371 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 01:36:45,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:45,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:36:45,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:36:45,432 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 01:36:45,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666428616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:45,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:36:45,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-29 01:36:45,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068166932] [2023-11-29 01:36:45,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:45,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:36:45,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:45,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:36:45,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:36:45,436 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 01:36:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:45,537 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2023-11-29 01:36:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:36:45,539 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 01:36:45,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:45,540 INFO L225 Difference]: With dead ends: 19 [2023-11-29 01:36:45,540 INFO L226 Difference]: Without dead ends: 17 [2023-11-29 01:36:45,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:36:45,541 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:45,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 37 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:36:45,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-29 01:36:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-11-29 01:36:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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 01:36:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-11-29 01:36:45,547 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2023-11-29 01:36:45,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:45,547 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-11-29 01:36:45,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 01:36:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-11-29 01:36:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 01:36:45,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:45,548 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:45,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:36:45,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:45,753 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:45,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:45,754 INFO L85 PathProgramCache]: Analyzing trace with hash 584973411, now seen corresponding path program 3 times [2023-11-29 01:36:45,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:45,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950614660] [2023-11-29 01:36:45,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:45,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:45,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:45,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950614660] [2023-11-29 01:36:45,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950614660] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:45,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536240892] [2023-11-29 01:36:45,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:36:45,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:45,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:45,874 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:45,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:36:45,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 01:36:45,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:36:45,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:36:45,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:46,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:46,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536240892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:46,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:36:46,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-29 01:36:46,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531282298] [2023-11-29 01:36:46,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:46,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:36:46,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:46,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:36:46,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:36:46,088 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 01:36:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:46,179 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2023-11-29 01:36:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:36:46,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 15 [2023-11-29 01:36:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:46,180 INFO L225 Difference]: With dead ends: 36 [2023-11-29 01:36:46,180 INFO L226 Difference]: Without dead ends: 23 [2023-11-29 01:36:46,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:36:46,182 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:46,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 28 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:36:46,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-29 01:36:46,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2023-11-29 01:36:46,187 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 01:36:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-29 01:36:46,188 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-11-29 01:36:46,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:46,188 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-29 01:36:46,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 01:36:46,189 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-29 01:36:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 01:36:46,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:46,189 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:46,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:36:46,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:46,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:46,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:46,396 INFO L85 PathProgramCache]: Analyzing trace with hash -978470083, now seen corresponding path program 4 times [2023-11-29 01:36:46,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:46,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90542084] [2023-11-29 01:36:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:46,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:46,693 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 01:36:46,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:46,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90542084] [2023-11-29 01:36:46,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90542084] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:46,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764712371] [2023-11-29 01:36:46,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:36:46,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:46,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:46,695 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:46,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:36:46,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:36:46,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:36:46,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 01:36:46,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:46,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:36:46,868 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 01:36:46,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:46,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:36:46,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:36:46,968 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 01:36:46,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764712371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:46,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:36:46,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 16 [2023-11-29 01:36:46,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761655021] [2023-11-29 01:36:46,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:46,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:36:46,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:46,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:36:46,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:36:46,971 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 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 01:36:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:47,133 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2023-11-29 01:36:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:36:47,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 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 01:36:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:47,134 INFO L225 Difference]: With dead ends: 23 [2023-11-29 01:36:47,134 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 01:36:47,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:36:47,135 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:47,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 34 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:36:47,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 01:36:47,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-11-29 01:36:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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 01:36:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-11-29 01:36:47,142 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2023-11-29 01:36:47,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:47,142 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-11-29 01:36:47,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 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 01:36:47,142 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-11-29 01:36:47,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 01:36:47,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:47,143 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:47,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:36:47,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:47,344 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:47,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:47,344 INFO L85 PathProgramCache]: Analyzing trace with hash 345588768, now seen corresponding path program 5 times [2023-11-29 01:36:47,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:47,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541543363] [2023-11-29 01:36:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:47,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:47,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:47,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541543363] [2023-11-29 01:36:47,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541543363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:47,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383776299] [2023-11-29 01:36:47,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:36:47,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:47,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:47,477 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:47,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:36:47,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 01:36:47,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:36:47,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:36:47,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:47,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:47,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383776299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:47,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:36:47,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 01:36:47,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133136405] [2023-11-29 01:36:47,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:47,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 01:36:47,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:47,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 01:36:47,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:36:47,747 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 01:36:47,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:47,847 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2023-11-29 01:36:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:36:47,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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) Word has length 19 [2023-11-29 01:36:47,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:47,849 INFO L225 Difference]: With dead ends: 43 [2023-11-29 01:36:47,849 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 01:36:47,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:36:47,850 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:47,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:36:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 01:36:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2023-11-29 01:36:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 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 01:36:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-11-29 01:36:47,856 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2023-11-29 01:36:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:47,856 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-11-29 01:36:47,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 01:36:47,857 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-11-29 01:36:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 01:36:47,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:47,858 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:47,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:36:48,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:48,061 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:48,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:48,061 INFO L85 PathProgramCache]: Analyzing trace with hash 962201082, now seen corresponding path program 6 times [2023-11-29 01:36:48,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:48,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173978424] [2023-11-29 01:36:48,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:48,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:48,333 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 01:36:48,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:48,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173978424] [2023-11-29 01:36:48,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173978424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:48,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617934348] [2023-11-29 01:36:48,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:36:48,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:48,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:48,336 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:48,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:36:48,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 01:36:48,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:36:48,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 01:36:48,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:48,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:36:48,559 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 01:36:48,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:48,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:36:48,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:36:48,634 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 01:36:48,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617934348] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:48,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:36:48,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2023-11-29 01:36:48,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687132141] [2023-11-29 01:36:48,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:48,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 01:36:48,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:48,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 01:36:48,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:36:48,637 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 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 01:36:48,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:48,849 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-11-29 01:36:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:36:48,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 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 01:36:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:48,850 INFO L225 Difference]: With dead ends: 27 [2023-11-29 01:36:48,850 INFO L226 Difference]: Without dead ends: 25 [2023-11-29 01:36:48,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:36:48,852 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:48,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 69 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:36:48,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-29 01:36:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-11-29 01:36:48,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 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 01:36:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-11-29 01:36:48,859 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2023-11-29 01:36:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:48,860 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-11-29 01:36:48,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 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 01:36:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-11-29 01:36:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 01:36:48,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:48,861 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:48,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 01:36:49,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:49,062 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:49,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:49,062 INFO L85 PathProgramCache]: Analyzing trace with hash 325493827, now seen corresponding path program 7 times [2023-11-29 01:36:49,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:49,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293580201] [2023-11-29 01:36:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:49,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:49,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:49,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293580201] [2023-11-29 01:36:49,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293580201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:49,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338569952] [2023-11-29 01:36:49,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:36:49,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:49,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:49,253 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:49,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:36:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:49,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:36:49,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:49,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:49,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338569952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:49,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:36:49,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-29 01:36:49,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657891597] [2023-11-29 01:36:49,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:49,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:36:49,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:49,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:36:49,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:36:49,558 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 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 01:36:49,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:49,678 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-11-29 01:36:49,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:36:49,680 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 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 23 [2023-11-29 01:36:49,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:49,680 INFO L225 Difference]: With dead ends: 50 [2023-11-29 01:36:49,680 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 01:36:49,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:36:49,682 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:49,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 43 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:36:49,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 01:36:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2023-11-29 01:36:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 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 01:36:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-11-29 01:36:49,688 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2023-11-29 01:36:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:49,689 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-11-29 01:36:49,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 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 01:36:49,689 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-11-29 01:36:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 01:36:49,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:49,690 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:49,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:36:49,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:36:49,893 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:49,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:49,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2082543331, now seen corresponding path program 8 times [2023-11-29 01:36:49,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:49,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075905816] [2023-11-29 01:36:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:49,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:50,354 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 01:36:50,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:50,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075905816] [2023-11-29 01:36:50,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075905816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:50,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321699548] [2023-11-29 01:36:50,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:36:50,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:50,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:50,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:50,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:36:50,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:36:50,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:36:50,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 01:36:50,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:50,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:36:50,645 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 01:36:50,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:50,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:36:50,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:36:50,935 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 01:36:50,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321699548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:50,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:36:50,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2023-11-29 01:36:50,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911645331] [2023-11-29 01:36:50,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:50,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 01:36:50,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:50,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 01:36:50,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:36:50,938 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 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 01:36:51,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:51,234 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2023-11-29 01:36:51,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 01:36:51,234 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 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 01:36:51,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:51,235 INFO L225 Difference]: With dead ends: 31 [2023-11-29 01:36:51,235 INFO L226 Difference]: Without dead ends: 29 [2023-11-29 01:36:51,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 01:36:51,237 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:51,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 102 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:36:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-29 01:36:51,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-29 01:36:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 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 01:36:51,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-11-29 01:36:51,243 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2023-11-29 01:36:51,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:51,243 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-11-29 01:36:51,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 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 01:36:51,244 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-11-29 01:36:51,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 01:36:51,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:51,245 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:51,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:36:51,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 01:36:51,451 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:51,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:51,451 INFO L85 PathProgramCache]: Analyzing trace with hash -240989632, now seen corresponding path program 9 times [2023-11-29 01:36:51,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:51,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057770521] [2023-11-29 01:36:51,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:51,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:51,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:51,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057770521] [2023-11-29 01:36:51,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057770521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:51,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110458688] [2023-11-29 01:36:51,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:36:51,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:51,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:51,614 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:51,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:36:51,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 01:36:51,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:36:51,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:36:51,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:51,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:52,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110458688] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:52,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:36:52,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-29 01:36:52,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106935581] [2023-11-29 01:36:52,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:52,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 01:36:52,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:52,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 01:36:52,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:36:52,021 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 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 01:36:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:52,152 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2023-11-29 01:36:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:36:52,152 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 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 27 [2023-11-29 01:36:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:52,153 INFO L225 Difference]: With dead ends: 57 [2023-11-29 01:36:52,153 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 01:36:52,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-11-29 01:36:52,155 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:52,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:36:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 01:36:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2023-11-29 01:36:52,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 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 01:36:52,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-11-29 01:36:52,162 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2023-11-29 01:36:52,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:52,162 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-11-29 01:36:52,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 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 01:36:52,162 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-11-29 01:36:52,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 01:36:52,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:52,163 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:52,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 01:36:52,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:36:52,370 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:52,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:52,370 INFO L85 PathProgramCache]: Analyzing trace with hash 811143706, now seen corresponding path program 10 times [2023-11-29 01:36:52,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:52,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918841512] [2023-11-29 01:36:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:52,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:52,755 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 01:36:52,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:52,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918841512] [2023-11-29 01:36:52,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918841512] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:52,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839082118] [2023-11-29 01:36:52,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:36:52,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:52,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:52,757 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:52,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:36:52,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:36:52,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:36:52,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 01:36:52,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:52,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:36:53,083 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 01:36:53,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:53,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:36:53,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:36:53,188 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 01:36:53,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839082118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:53,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:36:53,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 25 [2023-11-29 01:36:53,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466812086] [2023-11-29 01:36:53,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:53,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 01:36:53,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:53,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 01:36:53,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:36:53,191 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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 01:36:53,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:53,535 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2023-11-29 01:36:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 01:36:53,535 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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 28 [2023-11-29 01:36:53,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:53,536 INFO L225 Difference]: With dead ends: 35 [2023-11-29 01:36:53,536 INFO L226 Difference]: Without dead ends: 33 [2023-11-29 01:36:53,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 01:36:53,537 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:53,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 106 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:36:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-29 01:36:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-11-29 01:36:53,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 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 01:36:53,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-11-29 01:36:53,545 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2023-11-29 01:36:53,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:53,545 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-11-29 01:36:53,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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 01:36:53,546 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-11-29 01:36:53,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 01:36:53,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:53,547 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:53,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 01:36:53,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:36:53,747 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:53,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:53,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1300931619, now seen corresponding path program 11 times [2023-11-29 01:36:53,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:53,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369864762] [2023-11-29 01:36:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:53,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:53,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:53,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369864762] [2023-11-29 01:36:53,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369864762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:53,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189240815] [2023-11-29 01:36:53,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:36:53,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:53,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:53,985 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:53,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:36:54,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 01:36:54,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:36:54,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:36:54,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:54,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:36:54,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189240815] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:54,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:36:54,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-29 01:36:54,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43923886] [2023-11-29 01:36:54,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:54,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 01:36:54,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:54,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 01:36:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-29 01:36:54,433 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 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 01:36:54,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:54,548 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2023-11-29 01:36:54,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 01:36:54,549 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 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 31 [2023-11-29 01:36:54,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:54,549 INFO L225 Difference]: With dead ends: 64 [2023-11-29 01:36:54,549 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 01:36:54,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 01:36:54,550 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:54,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 51 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:36:54,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 01:36:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2023-11-29 01:36:54,557 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 01:36:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-11-29 01:36:54,558 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2023-11-29 01:36:54,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:54,558 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-11-29 01:36:54,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 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 01:36:54,558 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-11-29 01:36:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 01:36:54,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:54,559 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:54,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:36:54,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 01:36:54,760 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:54,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:54,760 INFO L85 PathProgramCache]: Analyzing trace with hash 902131453, now seen corresponding path program 12 times [2023-11-29 01:36:54,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:54,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395683719] [2023-11-29 01:36:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:54,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:55,206 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 01:36:55,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:55,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395683719] [2023-11-29 01:36:55,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395683719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:55,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952317490] [2023-11-29 01:36:55,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:36:55,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:55,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:55,208 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:55,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:36:55,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-29 01:36:55,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:36:55,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 01:36:55,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:55,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:36:55,902 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 01:36:55,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:56,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:36:56,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:36:56,522 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 01:36:56,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952317490] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:56,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:36:56,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 53 [2023-11-29 01:36:56,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104799365] [2023-11-29 01:36:56,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:56,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 01:36:56,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:56,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 01:36:56,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2468, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 01:36:56,526 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 53 states have internal predecessors, (91), 0 states have call successors, (0), 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 01:36:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:58,481 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2023-11-29 01:36:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 01:36:58,482 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 53 states have internal predecessors, (91), 0 states have call successors, (0), 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 01:36:58,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:58,482 INFO L225 Difference]: With dead ends: 88 [2023-11-29 01:36:58,482 INFO L226 Difference]: Without dead ends: 86 [2023-11-29 01:36:58,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1002, Invalid=7554, Unknown=0, NotChecked=0, Total=8556 [2023-11-29 01:36:58,486 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 133 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:58,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 258 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:36:58,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-29 01:36:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 59. [2023-11-29 01:36:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:36:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-11-29 01:36:58,497 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 32 [2023-11-29 01:36:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:58,497 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-11-29 01:36:58,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 53 states have internal predecessors, (91), 0 states have call successors, (0), 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 01:36:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-11-29 01:36:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 01:36:58,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:58,498 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:58,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:36:58,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:36:58,699 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:58,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:58,699 INFO L85 PathProgramCache]: Analyzing trace with hash -794966470, now seen corresponding path program 13 times [2023-11-29 01:36:58,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:58,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281704611] [2023-11-29 01:36:58,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:58,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:59,182 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 01:36:59,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:59,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281704611] [2023-11-29 01:36:59,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281704611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:59,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838083746] [2023-11-29 01:36:59,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:36:59,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:59,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:59,185 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:59,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:36:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:59,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 01:36:59,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:59,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:36:59,862 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 01:36:59,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:59,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:36:59,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:36:59,948 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 01:36:59,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838083746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:59,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:36:59,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2023-11-29 01:36:59,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080925350] [2023-11-29 01:36:59,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:59,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 01:36:59,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:59,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 01:36:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 01:36:59,950 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 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 01:37:00,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:00,391 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2023-11-29 01:37:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 01:37:00,392 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-29 01:37:00,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:00,392 INFO L225 Difference]: With dead ends: 90 [2023-11-29 01:37:00,392 INFO L226 Difference]: Without dead ends: 88 [2023-11-29 01:37:00,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=188, Invalid=2164, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 01:37:00,394 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:00,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 336 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:37:00,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-29 01:37:00,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 59. [2023-11-29 01:37:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:37:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-11-29 01:37:00,409 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 36 [2023-11-29 01:37:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:00,409 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-11-29 01:37:00,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 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 01:37:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-11-29 01:37:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 01:37:00,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:00,410 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:00,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:37:00,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:37:00,611 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:00,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:00,611 INFO L85 PathProgramCache]: Analyzing trace with hash -391644157, now seen corresponding path program 14 times [2023-11-29 01:37:00,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:00,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640681082] [2023-11-29 01:37:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:00,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:00,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:00,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640681082] [2023-11-29 01:37:00,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640681082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:00,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659545681] [2023-11-29 01:37:00,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:37:00,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:00,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:00,885 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:00,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:37:00,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:37:00,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:00,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:37:00,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:01,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:01,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659545681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:01,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:01,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-29 01:37:01,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486025370] [2023-11-29 01:37:01,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:01,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 01:37:01,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:01,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 01:37:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:37:01,462 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 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 01:37:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:01,711 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2023-11-29 01:37:01,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 01:37:01,712 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 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 39 [2023-11-29 01:37:01,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:01,713 INFO L225 Difference]: With dead ends: 120 [2023-11-29 01:37:01,713 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 01:37:01,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 17 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 01:37:01,715 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:01,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 81 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:37:01,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 01:37:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-11-29 01:37:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 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 01:37:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-11-29 01:37:01,730 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2023-11-29 01:37:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:01,730 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-11-29 01:37:01,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 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 01:37:01,730 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-11-29 01:37:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 01:37:01,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:01,731 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:01,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:37:01,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:37:01,932 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:01,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:01,932 INFO L85 PathProgramCache]: Analyzing trace with hash 952061149, now seen corresponding path program 15 times [2023-11-29 01:37:01,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:01,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111663764] [2023-11-29 01:37:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:01,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:02,755 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 01:37:02,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:02,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111663764] [2023-11-29 01:37:02,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111663764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:02,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621887626] [2023-11-29 01:37:02,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:37:02,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:02,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:02,757 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:02,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:37:03,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 01:37:03,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:03,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 01:37:03,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:03,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:37:03,683 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 01:37:03,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:04,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:37:04,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:37:04,055 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 01:37:04,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621887626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:04,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:04,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2023-11-29 01:37:04,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968185025] [2023-11-29 01:37:04,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:04,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 01:37:04,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:04,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 01:37:04,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2410, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 01:37:04,058 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 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 01:37:04,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:04,994 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2023-11-29 01:37:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 01:37:04,995 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 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 01:37:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:04,995 INFO L225 Difference]: With dead ends: 47 [2023-11-29 01:37:04,995 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 01:37:04,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=291, Invalid=4401, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 01:37:05,002 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:05,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 353 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:37:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 01:37:05,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-11-29 01:37:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 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 01:37:05,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-11-29 01:37:05,012 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2023-11-29 01:37:05,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:05,012 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-11-29 01:37:05,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 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 01:37:05,012 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-11-29 01:37:05,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 01:37:05,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:05,013 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:05,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:37:05,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:37:05,213 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:05,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:05,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1105539456, now seen corresponding path program 16 times [2023-11-29 01:37:05,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:05,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512622706] [2023-11-29 01:37:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:05,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:05,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:05,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512622706] [2023-11-29 01:37:05,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512622706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:05,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154062014] [2023-11-29 01:37:05,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:37:05,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:05,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:05,502 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:05,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:37:05,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:37:05,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:05,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:37:05,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:05,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:06,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154062014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:06,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:06,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-29 01:37:06,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37694446] [2023-11-29 01:37:06,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:06,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 01:37:06,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:06,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 01:37:06,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:37:06,093 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 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 01:37:06,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:06,251 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2023-11-29 01:37:06,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 01:37:06,251 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 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) Word has length 43 [2023-11-29 01:37:06,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:06,252 INFO L225 Difference]: With dead ends: 85 [2023-11-29 01:37:06,252 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 01:37:06,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 55 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 01:37:06,254 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 109 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:06,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 64 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:37:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 01:37:06,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-11-29 01:37:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 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 01:37:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-11-29 01:37:06,266 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2023-11-29 01:37:06,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:06,266 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-11-29 01:37:06,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 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 01:37:06,266 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-11-29 01:37:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 01:37:06,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:06,267 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:06,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:37:06,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:06,467 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:06,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:06,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1643503014, now seen corresponding path program 17 times [2023-11-29 01:37:06,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:06,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362139472] [2023-11-29 01:37:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:06,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:07,097 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 01:37:07,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:07,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362139472] [2023-11-29 01:37:07,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362139472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:07,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675488094] [2023-11-29 01:37:07,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:37:07,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:07,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:07,125 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:07,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:37:07,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-29 01:37:07,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:07,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-29 01:37:07,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:07,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:37:08,085 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 01:37:08,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:08,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:37:08,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:37:08,258 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 01:37:08,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675488094] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:08,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:08,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 49 [2023-11-29 01:37:08,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878497216] [2023-11-29 01:37:08,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:08,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 01:37:08,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:08,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 01:37:08,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2205, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 01:37:08,260 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 49 states have internal predecessors, (92), 0 states have call successors, (0), 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 01:37:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:09,007 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2023-11-29 01:37:09,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 01:37:09,007 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 49 states have internal predecessors, (92), 0 states have call successors, (0), 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 01:37:09,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:09,008 INFO L225 Difference]: With dead ends: 51 [2023-11-29 01:37:09,008 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 01:37:09,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=245, Invalid=3415, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 01:37:09,011 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:09,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 351 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:37:09,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 01:37:09,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-11-29 01:37:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 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 01:37:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2023-11-29 01:37:09,025 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2023-11-29 01:37:09,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:09,025 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2023-11-29 01:37:09,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 49 states have internal predecessors, (92), 0 states have call successors, (0), 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 01:37:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2023-11-29 01:37:09,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 01:37:09,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:09,026 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:09,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:37:09,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:09,226 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:09,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1033677795, now seen corresponding path program 18 times [2023-11-29 01:37:09,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:09,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002209844] [2023-11-29 01:37:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:09,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:09,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:09,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002209844] [2023-11-29 01:37:09,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002209844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:09,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412611930] [2023-11-29 01:37:09,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:37:09,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:09,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:09,553 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:09,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:37:09,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-11-29 01:37:09,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:09,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 01:37:09,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:10,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:10,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412611930] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:10,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:10,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-11-29 01:37:10,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221461086] [2023-11-29 01:37:10,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:10,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 01:37:10,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:10,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 01:37:10,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 01:37:10,328 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:37:10,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:10,522 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2023-11-29 01:37:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 01:37:10,523 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 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 47 [2023-11-29 01:37:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:10,523 INFO L225 Difference]: With dead ends: 92 [2023-11-29 01:37:10,523 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 01:37:10,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 60 SyntacticMatches, 21 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 01:37:10,525 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 93 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:10,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 95 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:37:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 01:37:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2023-11-29 01:37:10,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 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 01:37:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-11-29 01:37:10,538 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2023-11-29 01:37:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:10,538 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-11-29 01:37:10,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:37:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-11-29 01:37:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 01:37:10,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:10,539 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:10,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:37:10,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:10,740 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:10,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash 732594877, now seen corresponding path program 19 times [2023-11-29 01:37:10,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:10,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909460977] [2023-11-29 01:37:10,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:10,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:11,371 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 01:37:11,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:11,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909460977] [2023-11-29 01:37:11,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909460977] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:11,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586596590] [2023-11-29 01:37:11,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:37:11,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:11,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:11,373 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:11,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:37:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:11,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 01:37:11,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:11,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:37:12,286 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 01:37:12,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:12,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:37:12,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:37:12,394 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 01:37:12,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586596590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:12,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:12,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-11-29 01:37:12,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378080269] [2023-11-29 01:37:12,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:12,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 01:37:12,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:12,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 01:37:12,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 01:37:12,397 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 51 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 01:37:13,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:13,059 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2023-11-29 01:37:13,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 01:37:13,059 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 51 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) Word has length 48 [2023-11-29 01:37:13,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:13,060 INFO L225 Difference]: With dead ends: 55 [2023-11-29 01:37:13,060 INFO L226 Difference]: Without dead ends: 53 [2023-11-29 01:37:13,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=243, Invalid=3663, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 01:37:13,063 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:13,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 407 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:37:13,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-29 01:37:13,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-11-29 01:37:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 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 01:37:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2023-11-29 01:37:13,076 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2023-11-29 01:37:13,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:13,077 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2023-11-29 01:37:13,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 51 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 01:37:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2023-11-29 01:37:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 01:37:13,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:13,077 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:13,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:37:13,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:13,278 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:13,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:13,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2009943200, now seen corresponding path program 20 times [2023-11-29 01:37:13,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:13,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744111331] [2023-11-29 01:37:13,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:13,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:13,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:13,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744111331] [2023-11-29 01:37:13,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744111331] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:13,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187345318] [2023-11-29 01:37:13,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:37:13,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:13,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:13,637 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:13,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:37:13,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:37:13,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:13,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 01:37:13,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:14,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:14,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187345318] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:14,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:14,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-11-29 01:37:14,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623593558] [2023-11-29 01:37:14,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:14,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 01:37:14,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:14,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 01:37:14,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 01:37:14,337 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 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 01:37:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:14,557 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2023-11-29 01:37:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 01:37:14,557 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 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 51 [2023-11-29 01:37:14,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:14,558 INFO L225 Difference]: With dead ends: 99 [2023-11-29 01:37:14,558 INFO L226 Difference]: Without dead ends: 59 [2023-11-29 01:37:14,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 65 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 01:37:14,559 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 87 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:14,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 85 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:37:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-29 01:37:14,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2023-11-29 01:37:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:37:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-11-29 01:37:14,573 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2023-11-29 01:37:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:14,573 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-11-29 01:37:14,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 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 01:37:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-11-29 01:37:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 01:37:14,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:14,573 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:14,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:37:14,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:14,774 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:14,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:14,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1795171962, now seen corresponding path program 21 times [2023-11-29 01:37:14,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:14,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406873329] [2023-11-29 01:37:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:14,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:15,531 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 01:37:15,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:15,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406873329] [2023-11-29 01:37:15,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406873329] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:15,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957289340] [2023-11-29 01:37:15,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:37:15,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:15,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:15,533 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:15,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:37:16,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-11-29 01:37:16,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:16,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 01:37:16,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:16,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:37:16,506 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 01:37:16,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:16,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:37:16,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:37:16,608 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 01:37:16,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957289340] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:16,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:16,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 41 [2023-11-29 01:37:16,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993085726] [2023-11-29 01:37:16,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:16,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 01:37:16,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:16,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 01:37:16,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 01:37:16,610 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 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 01:37:17,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:17,327 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2023-11-29 01:37:17,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 01:37:17,328 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 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 01:37:17,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:17,328 INFO L225 Difference]: With dead ends: 59 [2023-11-29 01:37:17,328 INFO L226 Difference]: Without dead ends: 57 [2023-11-29 01:37:17,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=2669, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 01:37:17,329 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:17,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 422 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:37:17,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-29 01:37:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-11-29 01:37:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 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 01:37:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-11-29 01:37:17,343 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2023-11-29 01:37:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:17,343 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-11-29 01:37:17,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 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 01:37:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-11-29 01:37:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 01:37:17,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:17,344 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:17,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 01:37:17,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:17,545 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:17,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:17,545 INFO L85 PathProgramCache]: Analyzing trace with hash -960056381, now seen corresponding path program 22 times [2023-11-29 01:37:17,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:17,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750698676] [2023-11-29 01:37:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:17,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:17,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:17,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750698676] [2023-11-29 01:37:17,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750698676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:17,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888685050] [2023-11-29 01:37:17,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:37:17,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:17,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:17,948 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:17,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:37:18,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:37:18,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:18,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 01:37:18,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:18,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:18,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888685050] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:18,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:18,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-11-29 01:37:18,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234842356] [2023-11-29 01:37:18,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:18,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 01:37:18,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:18,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 01:37:18,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 01:37:18,750 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 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 01:37:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:19,009 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2023-11-29 01:37:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 01:37:19,009 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 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 55 [2023-11-29 01:37:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:19,010 INFO L225 Difference]: With dead ends: 106 [2023-11-29 01:37:19,010 INFO L226 Difference]: Without dead ends: 63 [2023-11-29 01:37:19,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 70 SyntacticMatches, 25 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 01:37:19,011 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 115 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:19,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 102 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:37:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-29 01:37:19,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2023-11-29 01:37:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 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 01:37:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-11-29 01:37:19,027 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2023-11-29 01:37:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:19,027 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-11-29 01:37:19,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 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 01:37:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-11-29 01:37:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 01:37:19,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:19,028 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:19,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 01:37:19,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 01:37:19,229 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:19,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash -823848803, now seen corresponding path program 23 times [2023-11-29 01:37:19,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:19,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818588716] [2023-11-29 01:37:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:19,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:20,309 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 01:37:20,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:20,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818588716] [2023-11-29 01:37:20,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818588716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:20,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431830914] [2023-11-29 01:37:20,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:37:20,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:20,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:20,310 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:20,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:37:20,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-29 01:37:20,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:20,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-29 01:37:20,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:20,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:37:20,911 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 01:37:20,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:21,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:37:21,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:37:21,698 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 01:37:21,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431830914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:21,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:21,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 60 [2023-11-29 01:37:21,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808868208] [2023-11-29 01:37:21,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:21,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 01:37:21,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:21,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 01:37:21,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3362, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 01:37:21,700 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 60 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 60 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 01:37:22,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:22,804 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2023-11-29 01:37:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 01:37:22,804 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 60 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 56 [2023-11-29 01:37:22,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:22,805 INFO L225 Difference]: With dead ends: 63 [2023-11-29 01:37:22,805 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 01:37:22,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=299, Invalid=5251, Unknown=0, NotChecked=0, Total=5550 [2023-11-29 01:37:22,806 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1916 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:22,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 577 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1916 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:37:22,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 01:37:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2023-11-29 01:37:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:37:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2023-11-29 01:37:22,824 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2023-11-29 01:37:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:22,824 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2023-11-29 01:37:22,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 60 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 01:37:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2023-11-29 01:37:22,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 01:37:22,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:22,825 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:22,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 01:37:23,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:23,025 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:23,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:23,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1831767360, now seen corresponding path program 24 times [2023-11-29 01:37:23,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:23,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758591807] [2023-11-29 01:37:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:23,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:23,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:23,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758591807] [2023-11-29 01:37:23,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758591807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:23,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776739738] [2023-11-29 01:37:23,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:37:23,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:23,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:23,536 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:23,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 01:37:24,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-11-29 01:37:24,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:24,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 01:37:24,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:24,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:25,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776739738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:25,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:25,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-11-29 01:37:25,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634295021] [2023-11-29 01:37:25,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:25,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 01:37:25,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:25,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 01:37:25,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 01:37:25,050 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 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 01:37:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:25,309 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2023-11-29 01:37:25,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 01:37:25,310 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 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 59 [2023-11-29 01:37:25,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:25,310 INFO L225 Difference]: With dead ends: 113 [2023-11-29 01:37:25,310 INFO L226 Difference]: Without dead ends: 67 [2023-11-29 01:37:25,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 75 SyntacticMatches, 27 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 01:37:25,312 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 153 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:25,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 117 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:37:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-29 01:37:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2023-11-29 01:37:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 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 01:37:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-11-29 01:37:25,326 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2023-11-29 01:37:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:25,326 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-11-29 01:37:25,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 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 01:37:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-11-29 01:37:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 01:37:25,327 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:25,327 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:25,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 01:37:25,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 01:37:25,528 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:25,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:25,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2019676826, now seen corresponding path program 25 times [2023-11-29 01:37:25,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:25,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786133071] [2023-11-29 01:37:25,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:25,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:26,240 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 01:37:26,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:26,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786133071] [2023-11-29 01:37:26,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786133071] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:26,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060501558] [2023-11-29 01:37:26,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:37:26,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:26,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:26,241 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:26,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 01:37:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:26,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 01:37:26,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:26,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:37:27,499 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 01:37:27,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:27,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:37:27,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:37:27,625 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 01:37:27,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060501558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:27,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:27,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2023-11-29 01:37:27,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496827653] [2023-11-29 01:37:27,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:27,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-29 01:37:27,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:27,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-29 01:37:27,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 01:37:27,627 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 63 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 01:37:28,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:28,583 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2023-11-29 01:37:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 01:37:28,583 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 63 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) Word has length 60 [2023-11-29 01:37:28,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:28,584 INFO L225 Difference]: With dead ends: 67 [2023-11-29 01:37:28,584 INFO L226 Difference]: Without dead ends: 65 [2023-11-29 01:37:28,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=5703, Unknown=0, NotChecked=0, Total=6006 [2023-11-29 01:37:28,585 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:28,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 614 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1829 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:37:28,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-29 01:37:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-11-29 01:37:28,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 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 01:37:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2023-11-29 01:37:28,598 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2023-11-29 01:37:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:28,598 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2023-11-29 01:37:28,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 63 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 01:37:28,599 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2023-11-29 01:37:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 01:37:28,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:28,599 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:28,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 01:37:28,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:28,800 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:28,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:28,800 INFO L85 PathProgramCache]: Analyzing trace with hash 267171, now seen corresponding path program 26 times [2023-11-29 01:37:28,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:28,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529156921] [2023-11-29 01:37:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:28,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:29,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:29,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529156921] [2023-11-29 01:37:29,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529156921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:29,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42334408] [2023-11-29 01:37:29,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:37:29,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:29,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:29,260 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:29,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 01:37:29,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:37:29,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:29,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 01:37:29,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:29,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:30,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42334408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:30,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:30,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-11-29 01:37:30,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291566136] [2023-11-29 01:37:30,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:30,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 01:37:30,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:30,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 01:37:30,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 01:37:30,164 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 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 01:37:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:30,444 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2023-11-29 01:37:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 01:37:30,445 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 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 63 [2023-11-29 01:37:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:30,445 INFO L225 Difference]: With dead ends: 120 [2023-11-29 01:37:30,445 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 01:37:30,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 80 SyntacticMatches, 29 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 01:37:30,447 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 129 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:30,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 135 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:37:30,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 01:37:30,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2023-11-29 01:37:30,461 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 01:37:30,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-11-29 01:37:30,461 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2023-11-29 01:37:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:30,461 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-11-29 01:37:30,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 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 01:37:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-11-29 01:37:30,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 01:37:30,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:30,462 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:30,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 01:37:30,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 01:37:30,663 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:30,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:30,663 INFO L85 PathProgramCache]: Analyzing trace with hash -464718211, now seen corresponding path program 27 times [2023-11-29 01:37:30,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:30,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808102683] [2023-11-29 01:37:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:30,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:31,597 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 01:37:31,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:31,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808102683] [2023-11-29 01:37:31,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808102683] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:31,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488775104] [2023-11-29 01:37:31,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:37:31,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:31,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:31,598 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:31,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 01:37:32,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-11-29 01:37:32,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:32,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-29 01:37:32,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:32,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:37:33,214 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 01:37:33,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:33,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:37:33,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:37:33,354 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 01:37:33,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488775104] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:33,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:33,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 50 [2023-11-29 01:37:33,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696705483] [2023-11-29 01:37:33,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:33,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 01:37:33,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:33,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 01:37:33,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2322, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 01:37:33,356 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 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 01:37:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:34,427 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2023-11-29 01:37:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 01:37:34,427 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 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 01:37:34,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:34,428 INFO L225 Difference]: With dead ends: 71 [2023-11-29 01:37:34,428 INFO L226 Difference]: Without dead ends: 69 [2023-11-29 01:37:34,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=238, Invalid=4052, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 01:37:34,429 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:34,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 654 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:37:34,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-29 01:37:34,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2023-11-29 01:37:34,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 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 01:37:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2023-11-29 01:37:34,445 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2023-11-29 01:37:34,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:34,445 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2023-11-29 01:37:34,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 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 01:37:34,445 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2023-11-29 01:37:34,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-29 01:37:34,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:34,445 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:34,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 01:37:34,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:34,646 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:34,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:34,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1735835424, now seen corresponding path program 28 times [2023-11-29 01:37:34,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:34,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430459725] [2023-11-29 01:37:34,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:34,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:35,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:35,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430459725] [2023-11-29 01:37:35,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430459725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:35,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92301131] [2023-11-29 01:37:35,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:37:35,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:35,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:35,264 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:35,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 01:37:35,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:37:35,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:35,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 01:37:35,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:36,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:36,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92301131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:36,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:36,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-11-29 01:37:36,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994184208] [2023-11-29 01:37:36,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:36,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 01:37:36,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 01:37:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 01:37:36,466 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 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 01:37:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:36,780 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2023-11-29 01:37:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 01:37:36,781 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 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 67 [2023-11-29 01:37:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:36,781 INFO L225 Difference]: With dead ends: 127 [2023-11-29 01:37:36,781 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 01:37:36,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 85 SyntacticMatches, 31 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 01:37:36,782 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 145 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:36,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 146 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:37:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 01:37:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2023-11-29 01:37:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 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 01:37:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2023-11-29 01:37:36,797 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2023-11-29 01:37:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:36,797 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2023-11-29 01:37:36,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 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 01:37:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2023-11-29 01:37:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 01:37:36,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:36,798 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:36,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 01:37:36,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 01:37:36,998 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:36,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:36,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1785649478, now seen corresponding path program 29 times [2023-11-29 01:37:36,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:36,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267333922] [2023-11-29 01:37:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:36,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:37,932 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 01:37:37,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:37,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267333922] [2023-11-29 01:37:37,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267333922] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:37,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081346919] [2023-11-29 01:37:37,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:37:37,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:37,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:37,934 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:37,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 01:37:38,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-11-29 01:37:38,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:38,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-29 01:37:38,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:38,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:37:39,882 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 01:37:39,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:40,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:37:40,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:37:40,114 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 01:37:40,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081346919] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:40,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:40,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 73 [2023-11-29 01:37:40,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069146480] [2023-11-29 01:37:40,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:40,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-29 01:37:40,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:40,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-29 01:37:40,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5037, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 01:37:40,116 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 73 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 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 01:37:41,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:41,489 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2023-11-29 01:37:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 01:37:41,489 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 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 01:37:41,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:41,490 INFO L225 Difference]: With dead ends: 75 [2023-11-29 01:37:41,490 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 01:37:41,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=365, Invalid=7825, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 01:37:41,491 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 2564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:41,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 785 Invalid, 2564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 01:37:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 01:37:41,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2023-11-29 01:37:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:37:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2023-11-29 01:37:41,513 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2023-11-29 01:37:41,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:41,513 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2023-11-29 01:37:41,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 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 01:37:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2023-11-29 01:37:41,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 01:37:41,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:41,513 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:41,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 01:37:41,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 01:37:41,714 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:41,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:41,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1186122627, now seen corresponding path program 30 times [2023-11-29 01:37:41,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:41,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319966406] [2023-11-29 01:37:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:41,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:42,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:42,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319966406] [2023-11-29 01:37:42,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319966406] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:42,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640941178] [2023-11-29 01:37:42,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:37:42,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:42,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:42,338 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:42,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 01:37:43,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-11-29 01:37:43,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:43,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 01:37:43,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:43,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:44,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640941178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:44,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:44,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-11-29 01:37:44,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82563491] [2023-11-29 01:37:44,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:44,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 01:37:44,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:44,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 01:37:44,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 01:37:44,072 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 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 01:37:44,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:44,379 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2023-11-29 01:37:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 01:37:44,379 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 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 71 [2023-11-29 01:37:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:44,380 INFO L225 Difference]: With dead ends: 134 [2023-11-29 01:37:44,380 INFO L226 Difference]: Without dead ends: 79 [2023-11-29 01:37:44,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 90 SyntacticMatches, 33 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 01:37:44,381 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 133 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:44,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 163 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:37:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-29 01:37:44,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2023-11-29 01:37:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 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 01:37:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2023-11-29 01:37:44,397 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2023-11-29 01:37:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:44,397 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2023-11-29 01:37:44,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 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 01:37:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2023-11-29 01:37:44,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-29 01:37:44,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:44,398 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:44,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 01:37:44,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 01:37:44,598 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:44,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:44,599 INFO L85 PathProgramCache]: Analyzing trace with hash 255865949, now seen corresponding path program 31 times [2023-11-29 01:37:44,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:44,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296535513] [2023-11-29 01:37:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:44,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:45,840 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 01:37:45,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:45,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296535513] [2023-11-29 01:37:45,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296535513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:45,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082664921] [2023-11-29 01:37:45,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:37:45,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:45,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:45,842 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:45,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 01:37:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:45,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-29 01:37:45,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:46,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:37:46,938 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 01:37:46,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:47,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:37:47,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:37:48,579 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 01:37:48,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082664921] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:48,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:48,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 90 [2023-11-29 01:37:48,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666884231] [2023-11-29 01:37:48,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:48,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-11-29 01:37:48,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:48,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-11-29 01:37:48,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=7731, Unknown=0, NotChecked=0, Total=8010 [2023-11-29 01:37:48,582 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 90 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 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 01:37:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:50,598 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2023-11-29 01:37:50,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-29 01:37:50,598 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 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 01:37:50,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:50,599 INFO L225 Difference]: With dead ends: 79 [2023-11-29 01:37:50,599 INFO L226 Difference]: Without dead ends: 77 [2023-11-29 01:37:50,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=437, Invalid=11119, Unknown=0, NotChecked=0, Total=11556 [2023-11-29 01:37:50,600 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 3611 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 3629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:50,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1188 Invalid, 3629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3611 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 01:37:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-29 01:37:50,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2023-11-29 01:37:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 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 01:37:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2023-11-29 01:37:50,624 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2023-11-29 01:37:50,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:50,625 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2023-11-29 01:37:50,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 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 01:37:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2023-11-29 01:37:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-29 01:37:50,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:50,625 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:50,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 01:37:50,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 01:37:50,826 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:50,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:50,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1059670272, now seen corresponding path program 32 times [2023-11-29 01:37:50,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:50,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621020958] [2023-11-29 01:37:50,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:50,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:51,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:51,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621020958] [2023-11-29 01:37:51,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621020958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:51,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267933011] [2023-11-29 01:37:51,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:37:51,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:51,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:51,463 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:51,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 01:37:51,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:37:51,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:51,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 01:37:51,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:52,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:37:52,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267933011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:52,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:37:52,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2023-11-29 01:37:52,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836615520] [2023-11-29 01:37:52,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:52,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-29 01:37:52,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:52,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-29 01:37:52,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=2619, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 01:37:52,626 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 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 01:37:52,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:52,945 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2023-11-29 01:37:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 01:37:52,945 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 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 75 [2023-11-29 01:37:52,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:52,946 INFO L225 Difference]: With dead ends: 141 [2023-11-29 01:37:52,946 INFO L226 Difference]: Without dead ends: 83 [2023-11-29 01:37:52,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 95 SyntacticMatches, 35 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1370, Invalid=4482, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 01:37:52,947 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 145 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:52,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 140 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:37:52,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-29 01:37:52,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2023-11-29 01:37:52,965 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 01:37:52,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2023-11-29 01:37:52,965 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2023-11-29 01:37:52,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:52,965 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2023-11-29 01:37:52,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 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 01:37:52,966 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2023-11-29 01:37:52,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-29 01:37:52,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:52,966 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:52,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 01:37:53,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 01:37:53,167 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:53,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:53,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1081090778, now seen corresponding path program 33 times [2023-11-29 01:37:53,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:53,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946278964] [2023-11-29 01:37:53,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:53,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:54,384 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 01:37:54,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:54,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946278964] [2023-11-29 01:37:54,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946278964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:54,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797265441] [2023-11-29 01:37:54,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:37:54,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:54,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:54,385 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:54,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 01:37:56,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-11-29 01:37:56,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:37:56,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 126 conjunts are in the unsatisfiable core [2023-11-29 01:37:56,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:56,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:37:58,276 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 01:37:58,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:59,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:37:59,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:38:00,980 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 01:38:00,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797265441] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:38:00,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:38:00,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 42, 42] total 119 [2023-11-29 01:38:00,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355669488] [2023-11-29 01:38:00,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:38:00,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-11-29 01:38:00,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:00,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-11-29 01:38:00,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=985, Invalid=13057, Unknown=0, NotChecked=0, Total=14042 [2023-11-29 01:38:00,984 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 119 states, 119 states have (on average 1.8739495798319328) internal successors, (223), 119 states have internal predecessors, (223), 0 states have call successors, (0), 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 01:38:12,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:12,763 INFO L93 Difference]: Finished difference Result 198 states and 219 transitions. [2023-11-29 01:38:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-11-29 01:38:12,763 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.8739495798319328) internal successors, (223), 119 states have internal predecessors, (223), 0 states have call successors, (0), 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 01:38:12,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:12,764 INFO L225 Difference]: With dead ends: 198 [2023-11-29 01:38:12,765 INFO L226 Difference]: Without dead ends: 196 [2023-11-29 01:38:12,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11392 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=3520, Invalid=42062, Unknown=0, NotChecked=0, Total=45582 [2023-11-29 01:38:12,767 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 344 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 3996 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 4211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 3996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:12,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1322 Invalid, 4211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 3996 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 01:38:12,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-29 01:38:12,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 136. [2023-11-29 01:38:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 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 01:38:12,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2023-11-29 01:38:12,811 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 76 [2023-11-29 01:38:12,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:12,811 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2023-11-29 01:38:12,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.8739495798319328) internal successors, (223), 119 states have internal predecessors, (223), 0 states have call successors, (0), 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 01:38:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2023-11-29 01:38:12,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-29 01:38:12,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:12,812 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2023-11-29 01:38:12,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 01:38:13,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 01:38:13,012 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:38:13,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:13,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1264793027, now seen corresponding path program 34 times [2023-11-29 01:38:13,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:13,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597401808] [2023-11-29 01:38:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:13,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:14,215 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 01:38:14,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:14,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597401808] [2023-11-29 01:38:14,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597401808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:38:14,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005516558] [2023-11-29 01:38:14,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:38:14,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:14,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:14,217 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:14,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 01:38:14,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:38:14,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:38:14,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-29 01:38:14,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:15,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:38:16,947 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 01:38:16,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:38:17,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:38:17,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:38:17,192 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 01:38:17,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005516558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:38:17,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:38:17,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 85 [2023-11-29 01:38:17,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023193282] [2023-11-29 01:38:17,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:38:17,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-11-29 01:38:17,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:17,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-11-29 01:38:17,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=6883, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 01:38:17,195 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 85 states, 85 states have (on average 1.9058823529411764) internal successors, (162), 85 states have internal predecessors, (162), 0 states have call successors, (0), 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 01:38:19,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:19,230 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2023-11-29 01:38:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 01:38:19,231 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.9058823529411764) internal successors, (162), 85 states have internal predecessors, (162), 0 states have call successors, (0), 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 01:38:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:19,232 INFO L225 Difference]: With dead ends: 200 [2023-11-29 01:38:19,232 INFO L226 Difference]: Without dead ends: 198 [2023-11-29 01:38:19,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=437, Invalid=11119, Unknown=0, NotChecked=0, Total=11556 [2023-11-29 01:38:19,233 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 3755 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 3778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:19,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1326 Invalid, 3778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3755 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 01:38:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-29 01:38:19,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 136. [2023-11-29 01:38:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 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 01:38:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2023-11-29 01:38:19,293 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 80 [2023-11-29 01:38:19,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:19,293 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2023-11-29 01:38:19,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.9058823529411764) internal successors, (162), 85 states have internal predecessors, (162), 0 states have call successors, (0), 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 01:38:19,293 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2023-11-29 01:38:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-29 01:38:19,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:19,293 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2023-11-29 01:38:19,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 01:38:19,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 01:38:19,494 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:38:19,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:19,494 INFO L85 PathProgramCache]: Analyzing trace with hash 303813920, now seen corresponding path program 35 times [2023-11-29 01:38:19,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:19,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906441226] [2023-11-29 01:38:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:19,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:38:20,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:20,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906441226] [2023-11-29 01:38:20,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906441226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:38:20,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922216446] [2023-11-29 01:38:20,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:38:20,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:20,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:20,362 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:20,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 01:38:20,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-11-29 01:38:20,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:38:20,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 01:38:20,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:38:21,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:38:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:38:22,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922216446] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:38:22,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:38:22,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2023-11-29 01:38:22,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833194843] [2023-11-29 01:38:22,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:38:22,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-29 01:38:22,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:22,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-29 01:38:22,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 01:38:22,323 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 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 01:38:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:23,037 INFO L93 Difference]: Finished difference Result 263 states and 266 transitions. [2023-11-29 01:38:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-29 01:38:23,037 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 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) Word has length 83 [2023-11-29 01:38:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:23,038 INFO L225 Difference]: With dead ends: 263 [2023-11-29 01:38:23,038 INFO L226 Difference]: Without dead ends: 91 [2023-11-29 01:38:23,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 105 SyntacticMatches, 39 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4260 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2374, Invalid=8546, Unknown=0, NotChecked=0, Total=10920 [2023-11-29 01:38:23,040 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 288 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:23,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 193 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:38:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-29 01:38:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2023-11-29 01:38:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 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 01:38:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-11-29 01:38:23,086 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2023-11-29 01:38:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:23,087 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-11-29 01:38:23,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 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 01:38:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-11-29 01:38:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 01:38:23,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:23,087 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2023-11-29 01:38:23,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 01:38:23,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 01:38:23,288 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:38:23,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash -983513350, now seen corresponding path program 36 times [2023-11-29 01:38:23,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:23,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940590640] [2023-11-29 01:38:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:23,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:24,643 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 01:38:24,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:24,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940590640] [2023-11-29 01:38:24,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940590640] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:38:24,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050683745] [2023-11-29 01:38:24,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:38:24,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:24,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:24,644 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:24,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 01:38:26,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-11-29 01:38:26,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:38:27,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-29 01:38:27,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:27,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:38:27,247 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 01:38:27,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:38:28,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:38:28,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:38:28,117 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 01:38:28,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050683745] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:38:28,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:38:28,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 67 [2023-11-29 01:38:28,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088247697] [2023-11-29 01:38:28,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:38:28,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-29 01:38:28,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:28,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-29 01:38:28,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=4244, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 01:38:28,119 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 67 states have internal predecessors, (147), 0 states have call successors, (0), 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 01:38:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:30,187 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2023-11-29 01:38:30,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 01:38:30,187 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 67 states have internal predecessors, (147), 0 states have call successors, (0), 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 01:38:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:30,188 INFO L225 Difference]: With dead ends: 91 [2023-11-29 01:38:30,188 INFO L226 Difference]: Without dead ends: 89 [2023-11-29 01:38:30,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=333, Invalid=7499, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 01:38:30,189 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 3562 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 3584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:30,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1065 Invalid, 3584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3562 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 01:38:30,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-29 01:38:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2023-11-29 01:38:30,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 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 01:38:30,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2023-11-29 01:38:30,243 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2023-11-29 01:38:30,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:30,243 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2023-11-29 01:38:30,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 67 states have internal predecessors, (147), 0 states have call successors, (0), 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 01:38:30,243 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2023-11-29 01:38:30,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-29 01:38:30,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:30,244 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2023-11-29 01:38:30,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 01:38:30,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 01:38:30,444 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:38:30,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:30,445 INFO L85 PathProgramCache]: Analyzing trace with hash 425476931, now seen corresponding path program 37 times [2023-11-29 01:38:30,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:30,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547673483] [2023-11-29 01:38:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:30,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 552 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:38:31,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:31,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547673483] [2023-11-29 01:38:31,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547673483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:38:31,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862969891] [2023-11-29 01:38:31,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:38:31,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:31,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:31,269 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:31,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 01:38:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:31,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 01:38:31,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:38:32,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:38:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:38:32,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862969891] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:38:32,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:38:32,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2023-11-29 01:38:32,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781554905] [2023-11-29 01:38:32,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:38:32,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-11-29 01:38:32,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:32,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-11-29 01:38:32,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2023-11-29 01:38:32,743 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 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 01:38:33,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:33,199 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2023-11-29 01:38:33,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 01:38:33,199 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 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 87 [2023-11-29 01:38:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:33,200 INFO L225 Difference]: With dead ends: 162 [2023-11-29 01:38:33,200 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 01:38:33,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 110 SyntacticMatches, 41 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3614 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1817, Invalid=6015, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 01:38:33,201 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 253 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:33,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 167 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:38:33,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 01:38:33,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2023-11-29 01:38:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:38:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2023-11-29 01:38:33,244 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2023-11-29 01:38:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:33,244 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2023-11-29 01:38:33,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 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 01:38:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2023-11-29 01:38:33,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-29 01:38:33,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:33,244 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2023-11-29 01:38:33,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 01:38:33,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 01:38:33,445 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:38:33,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:33,445 INFO L85 PathProgramCache]: Analyzing trace with hash -624904163, now seen corresponding path program 38 times [2023-11-29 01:38:33,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:33,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876762288] [2023-11-29 01:38:33,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:33,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:35,272 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 01:38:35,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:35,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876762288] [2023-11-29 01:38:35,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876762288] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:38:35,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137310980] [2023-11-29 01:38:35,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:38:35,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:35,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:35,274 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:35,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 01:38:35,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:38:35,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:38:35,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-29 01:38:35,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:35,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:38:36,820 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 01:38:36,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:38:38,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:38:38,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:38:39,392 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 01:38:39,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137310980] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:38:39,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:38:39,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 110 [2023-11-29 01:38:39,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208011488] [2023-11-29 01:38:39,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:38:39,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-11-29 01:38:39,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:39,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-11-29 01:38:39,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=11647, Unknown=0, NotChecked=0, Total=11990 [2023-11-29 01:38:39,395 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 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 01:38:42,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:42,183 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2023-11-29 01:38:42,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 01:38:42,184 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 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 01:38:42,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:42,185 INFO L225 Difference]: With dead ends: 95 [2023-11-29 01:38:42,185 INFO L226 Difference]: Without dead ends: 93 [2023-11-29 01:38:42,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2772 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=537, Invalid=16755, Unknown=0, NotChecked=0, Total=17292 [2023-11-29 01:38:42,186 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 1518 mSDsCounter, 0 mSdLazyCounter, 4537 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 4560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:42,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1543 Invalid, 4560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4537 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 01:38:42,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-29 01:38:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2023-11-29 01:38:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:38:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2023-11-29 01:38:42,224 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2023-11-29 01:38:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:42,224 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2023-11-29 01:38:42,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 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 01:38:42,224 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2023-11-29 01:38:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-29 01:38:42,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:42,224 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2023-11-29 01:38:42,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 01:38:42,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-29 01:38:42,425 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:38:42,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:42,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2126865600, now seen corresponding path program 39 times [2023-11-29 01:38:42,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:42,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024635657] [2023-11-29 01:38:42,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:42,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:38:43,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:43,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024635657] [2023-11-29 01:38:43,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024635657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:38:43,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514613355] [2023-11-29 01:38:43,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:38:43,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:43,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:43,339 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:43,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 01:38:47,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2023-11-29 01:38:47,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:38:47,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 01:38:47,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:38:48,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:38:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:38:48,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514613355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:38:48,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:38:48,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2023-11-29 01:38:48,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324580218] [2023-11-29 01:38:48,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:38:48,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-29 01:38:48,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:48,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-29 01:38:48,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3815, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 01:38:48,669 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 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 01:38:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:49,150 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2023-11-29 01:38:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 01:38:49,151 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 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 91 [2023-11-29 01:38:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:49,152 INFO L225 Difference]: With dead ends: 169 [2023-11-29 01:38:49,152 INFO L226 Difference]: Without dead ends: 99 [2023-11-29 01:38:49,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 115 SyntacticMatches, 43 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3952 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1980, Invalid=6576, Unknown=0, NotChecked=0, Total=8556 [2023-11-29 01:38:49,153 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 257 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:49,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 194 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:38:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-29 01:38:49,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2023-11-29 01:38:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 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 01:38:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2023-11-29 01:38:49,194 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2023-11-29 01:38:49,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:49,194 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2023-11-29 01:38:49,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 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 01:38:49,194 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2023-11-29 01:38:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 01:38:49,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:49,195 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2023-11-29 01:38:49,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 01:38:49,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-29 01:38:49,395 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:38:49,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:49,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1598362394, now seen corresponding path program 40 times [2023-11-29 01:38:49,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:49,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609656597] [2023-11-29 01:38:49,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:49,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:51,054 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 01:38:51,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:51,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609656597] [2023-11-29 01:38:51,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609656597] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:38:51,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217000032] [2023-11-29 01:38:51,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:38:51,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:51,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:51,056 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:51,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 01:38:52,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:38:52,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:38:52,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 105 conjunts are in the unsatisfiable core [2023-11-29 01:38:52,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:53,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:38:54,949 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 01:38:54,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:38:55,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:38:55,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:38:55,197 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 01:38:55,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217000032] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:38:55,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:38:55,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 97 [2023-11-29 01:38:55,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779181578] [2023-11-29 01:38:55,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:38:55,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-29 01:38:55,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-29 01:38:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=9019, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 01:38:55,199 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 97 states, 97 states have (on average 1.9175257731958764) internal successors, (186), 97 states have internal predecessors, (186), 0 states have call successors, (0), 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 01:38:57,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:57,940 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2023-11-29 01:38:57,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-29 01:38:57,940 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9175257731958764) internal successors, (186), 97 states have internal predecessors, (186), 0 states have call successors, (0), 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 01:38:57,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:57,941 INFO L225 Difference]: With dead ends: 99 [2023-11-29 01:38:57,941 INFO L226 Difference]: Without dead ends: 97 [2023-11-29 01:38:57,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2538 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=487, Invalid=14033, Unknown=0, NotChecked=0, Total=14520 [2023-11-29 01:38:57,942 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 5604 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 5630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 5604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:57,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1767 Invalid, 5630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 5604 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 01:38:57,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-29 01:38:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-11-29 01:38:57,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 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 01:38:57,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2023-11-29 01:38:57,981 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2023-11-29 01:38:57,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:57,982 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2023-11-29 01:38:57,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.9175257731958764) internal successors, (186), 97 states have internal predecessors, (186), 0 states have call successors, (0), 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 01:38:57,982 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2023-11-29 01:38:57,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-29 01:38:57,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:57,982 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2023-11-29 01:38:57,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-29 01:38:58,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:58,183 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:38:58,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:58,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1483537629, now seen corresponding path program 41 times [2023-11-29 01:38:58,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:58,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196633981] [2023-11-29 01:38:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:58,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 673 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:38:59,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:59,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196633981] [2023-11-29 01:38:59,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196633981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:38:59,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101377283] [2023-11-29 01:38:59,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:38:59,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:59,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:59,178 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:59,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 01:38:59,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2023-11-29 01:38:59,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:38:59,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 01:38:59,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:39:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:39:00,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:39:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:39:01,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101377283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:39:01,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:39:01,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2023-11-29 01:39:01,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401565373] [2023-11-29 01:39:01,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:39:01,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-29 01:39:01,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:39:01,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-29 01:39:01,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1253, Invalid=4149, Unknown=0, NotChecked=0, Total=5402 [2023-11-29 01:39:01,507 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:39:02,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:39:02,035 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2023-11-29 01:39:02,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 01:39:02,036 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2023-11-29 01:39:02,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:39:02,037 INFO L225 Difference]: With dead ends: 176 [2023-11-29 01:39:02,037 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 01:39:02,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 120 SyntacticMatches, 45 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4305 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2150, Invalid=7162, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 01:39:02,038 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 281 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:39:02,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 189 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:39:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 01:39:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2023-11-29 01:39:02,090 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 01:39:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2023-11-29 01:39:02,091 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2023-11-29 01:39:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:39:02,091 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2023-11-29 01:39:02,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:39:02,091 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2023-11-29 01:39:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-29 01:39:02,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:39:02,091 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2023-11-29 01:39:02,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 01:39:02,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:02,292 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:39:02,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:39:02,292 INFO L85 PathProgramCache]: Analyzing trace with hash 160038397, now seen corresponding path program 42 times [2023-11-29 01:39:02,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:39:02,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756560245] [2023-11-29 01:39:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:02,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:39:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:39:03,947 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 01:39:03,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:39:03,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756560245] [2023-11-29 01:39:03,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756560245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:39:03,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823692221] [2023-11-29 01:39:03,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:39:03,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:03,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:39:03,949 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:39:03,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 01:39:05,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2023-11-29 01:39:05,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:39:05,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 102 conjunts are in the unsatisfiable core [2023-11-29 01:39:05,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:39:05,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:39:06,913 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 01:39:06,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:39:07,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:39:07,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:39:07,116 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 01:39:07,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823692221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:39:07,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:39:07,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 74 [2023-11-29 01:39:07,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61861656] [2023-11-29 01:39:07,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:39:07,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-29 01:39:07,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:39:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-29 01:39:07,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5210, Unknown=0, NotChecked=0, Total=5402 [2023-11-29 01:39:07,118 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 74 states, 74 states have (on average 2.2432432432432434) internal successors, (166), 74 states have internal predecessors, (166), 0 states have call successors, (0), 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 01:39:09,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:39:09,458 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2023-11-29 01:39:09,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-29 01:39:09,459 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2432432432432434) internal successors, (166), 74 states have internal predecessors, (166), 0 states have call successors, (0), 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 01:39:09,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:39:09,459 INFO L225 Difference]: With dead ends: 103 [2023-11-29 01:39:09,459 INFO L226 Difference]: Without dead ends: 101 [2023-11-29 01:39:09,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=358, Invalid=9148, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 01:39:09,460 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 4255 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 4279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 4255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:39:09,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1435 Invalid, 4279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 4255 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 01:39:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-29 01:39:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2023-11-29 01:39:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 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 01:39:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2023-11-29 01:39:09,503 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2023-11-29 01:39:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:39:09,503 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2023-11-29 01:39:09,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2432432432432434) internal successors, (166), 74 states have internal predecessors, (166), 0 states have call successors, (0), 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 01:39:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2023-11-29 01:39:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-29 01:39:09,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:39:09,503 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2023-11-29 01:39:09,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-29 01:39:09,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:09,704 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:39:09,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:39:09,704 INFO L85 PathProgramCache]: Analyzing trace with hash 294979936, now seen corresponding path program 43 times [2023-11-29 01:39:09,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:39:09,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640130245] [2023-11-29 01:39:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:09,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:39:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:39:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 738 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:39:10,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:39:10,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640130245] [2023-11-29 01:39:10,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640130245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:39:10,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714699504] [2023-11-29 01:39:10,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:39:10,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:10,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:39:10,766 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:39:10,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 01:39:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:39:10,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 01:39:10,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:39:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:39:11,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:39:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:39:12,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714699504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:39:12,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:39:12,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 77 [2023-11-29 01:39:12,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730799669] [2023-11-29 01:39:12,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:39:12,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-29 01:39:12,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:39:12,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-29 01:39:12,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=4497, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 01:39:12,550 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 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 01:39:13,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:39:13,130 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2023-11-29 01:39:13,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 01:39:13,130 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 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 99 [2023-11-29 01:39:13,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:39:13,131 INFO L225 Difference]: With dead ends: 183 [2023-11-29 01:39:13,131 INFO L226 Difference]: Without dead ends: 107 [2023-11-29 01:39:13,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 125 SyntacticMatches, 47 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4673 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2327, Invalid=7773, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 01:39:13,132 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 273 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:39:13,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 240 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:39:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-29 01:39:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2023-11-29 01:39:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 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 01:39:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2023-11-29 01:39:13,173 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2023-11-29 01:39:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:39:13,173 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2023-11-29 01:39:13,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 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 01:39:13,173 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2023-11-29 01:39:13,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-29 01:39:13,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:39:13,174 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2023-11-29 01:39:13,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-29 01:39:13,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:13,374 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:39:13,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:39:13,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1467942714, now seen corresponding path program 44 times [2023-11-29 01:39:13,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:39:13,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835267885] [2023-11-29 01:39:13,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:13,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:39:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:39:15,132 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 01:39:15,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:39:15,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835267885] [2023-11-29 01:39:15,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835267885] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:39:15,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44019003] [2023-11-29 01:39:15,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:39:15,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:15,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:39:15,134 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:39:15,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 01:39:15,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:39:15,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:39:15,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-29 01:39:15,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:39:16,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:39:18,477 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 01:39:18,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:39:18,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:39:18,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:39:18,687 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 01:39:18,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44019003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:39:18,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:39:18,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 103 [2023-11-29 01:39:18,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157845440] [2023-11-29 01:39:18,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:39:18,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-11-29 01:39:18,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:39:18,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-11-29 01:39:18,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=10202, Unknown=0, NotChecked=0, Total=10506 [2023-11-29 01:39:18,690 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 103 states, 103 states have (on average 1.9611650485436893) internal successors, (202), 103 states have internal predecessors, (202), 0 states have call successors, (0), 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 01:39:21,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:39:21,483 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2023-11-29 01:39:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-29 01:39:21,484 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.9611650485436893) internal successors, (202), 103 states have internal predecessors, (202), 0 states have call successors, (0), 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 01:39:21,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:39:21,484 INFO L225 Difference]: With dead ends: 107 [2023-11-29 01:39:21,485 INFO L226 Difference]: Without dead ends: 105 [2023-11-29 01:39:21,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2778 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=503, Invalid=15753, Unknown=0, NotChecked=0, Total=16256 [2023-11-29 01:39:21,486 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 5555 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 5580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 5555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:39:21,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1847 Invalid, 5580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 5555 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 01:39:21,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-29 01:39:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2023-11-29 01:39:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 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 01:39:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2023-11-29 01:39:21,533 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2023-11-29 01:39:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:39:21,533 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2023-11-29 01:39:21,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.9611650485436893) internal successors, (202), 103 states have internal predecessors, (202), 0 states have call successors, (0), 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 01:39:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2023-11-29 01:39:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 01:39:21,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:39:21,533 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2023-11-29 01:39:21,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 01:39:21,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 01:39:21,734 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:39:21,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:39:21,734 INFO L85 PathProgramCache]: Analyzing trace with hash 129178371, now seen corresponding path program 45 times [2023-11-29 01:39:21,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:39:21,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868388158] [2023-11-29 01:39:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:21,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:39:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:39:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 806 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:39:22,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:39:22,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868388158] [2023-11-29 01:39:22,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868388158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:39:22,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786699492] [2023-11-29 01:39:22,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:39:22,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:22,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:39:22,934 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:39:22,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 01:39:28,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2023-11-29 01:39:28,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:39:28,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 01:39:28,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:39:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:39:29,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:39:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:39:30,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786699492] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:39:30,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:39:30,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 80 [2023-11-29 01:39:30,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448573860] [2023-11-29 01:39:30,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:39:30,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-29 01:39:30,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:39:30,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-29 01:39:30,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1461, Invalid=4859, Unknown=0, NotChecked=0, Total=6320 [2023-11-29 01:39:30,738 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 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 01:39:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:39:31,372 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2023-11-29 01:39:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 01:39:31,373 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 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 103 [2023-11-29 01:39:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:39:31,374 INFO L225 Difference]: With dead ends: 190 [2023-11-29 01:39:31,374 INFO L226 Difference]: Without dead ends: 111 [2023-11-29 01:39:31,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 130 SyntacticMatches, 49 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5056 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2511, Invalid=8409, Unknown=0, NotChecked=0, Total=10920 [2023-11-29 01:39:31,375 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 377 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:39:31,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 315 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:39:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-29 01:39:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2023-11-29 01:39:31,423 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 01:39:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-11-29 01:39:31,423 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 103 [2023-11-29 01:39:31,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:39:31,423 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-11-29 01:39:31,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 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 01:39:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-11-29 01:39:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-29 01:39:31,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:39:31,424 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2023-11-29 01:39:31,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 01:39:31,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 01:39:31,625 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:39:31,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:39:31,625 INFO L85 PathProgramCache]: Analyzing trace with hash 710319069, now seen corresponding path program 46 times [2023-11-29 01:39:31,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:39:31,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012277072] [2023-11-29 01:39:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:31,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:39:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:39:33,780 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 01:39:33,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:39:33,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012277072] [2023-11-29 01:39:33,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012277072] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:39:33,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960530228] [2023-11-29 01:39:33,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:39:33,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:33,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:39:33,781 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:39:33,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 01:39:35,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:39:35,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:39:35,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 115 conjunts are in the unsatisfiable core [2023-11-29 01:39:35,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:39:37,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:39:39,301 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 01:39:39,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:39:41,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:39:41,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:39:41,564 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 01:39:41,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960530228] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:39:41,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:39:41,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 133 [2023-11-29 01:39:41,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016080690] [2023-11-29 01:39:41,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:39:41,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2023-11-29 01:39:41,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:39:41,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2023-11-29 01:39:41,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=17181, Unknown=0, NotChecked=0, Total=17556 [2023-11-29 01:39:41,567 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 133 states, 133 states have (on average 2.1052631578947367) internal successors, (280), 133 states have internal predecessors, (280), 0 states have call successors, (0), 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 01:39:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:39:48,330 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2023-11-29 01:39:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-29 01:39:48,330 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.1052631578947367) internal successors, (280), 133 states have internal predecessors, (280), 0 states have call successors, (0), 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 01:39:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:39:48,331 INFO L225 Difference]: With dead ends: 111 [2023-11-29 01:39:48,331 INFO L226 Difference]: Without dead ends: 109 [2023-11-29 01:39:48,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4315 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=819, Invalid=33221, Unknown=0, NotChecked=0, Total=34040 [2023-11-29 01:39:48,332 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 85 mSDsluCounter, 2320 mSDsCounter, 0 mSdLazyCounter, 7749 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2348 SdHoareTripleChecker+Invalid, 7776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 7749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:39:48,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 2348 Invalid, 7776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 7749 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-29 01:39:48,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-29 01:39:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2023-11-29 01:39:48,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 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 01:39:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2023-11-29 01:39:48,377 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2023-11-29 01:39:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:39:48,377 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2023-11-29 01:39:48,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.1052631578947367) internal successors, (280), 133 states have internal predecessors, (280), 0 states have call successors, (0), 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 01:39:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2023-11-29 01:39:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-29 01:39:48,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:39:48,378 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2023-11-29 01:39:48,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 01:39:48,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:48,579 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:39:48,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:39:48,579 INFO L85 PathProgramCache]: Analyzing trace with hash -183689344, now seen corresponding path program 47 times [2023-11-29 01:39:48,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:39:48,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115412548] [2023-11-29 01:39:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:48,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:39:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:39:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 877 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:39:49,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:39:49,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115412548] [2023-11-29 01:39:49,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115412548] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:39:49,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796484225] [2023-11-29 01:39:49,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:39:49,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:49,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:39:49,807 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:39:49,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 01:39:50,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2023-11-29 01:39:50,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:39:50,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 01:39:50,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:39:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:39:51,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:39:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:39:52,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796484225] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:39:52,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:39:52,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 83 [2023-11-29 01:39:52,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077814691] [2023-11-29 01:39:52,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:39:52,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-11-29 01:39:52,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:39:52,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-11-29 01:39:52,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1571, Invalid=5235, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 01:39:52,758 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:39:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:39:53,376 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2023-11-29 01:39:53,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 01:39:53,376 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2023-11-29 01:39:53,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:39:53,377 INFO L225 Difference]: With dead ends: 197 [2023-11-29 01:39:53,377 INFO L226 Difference]: Without dead ends: 115 [2023-11-29 01:39:53,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 135 SyntacticMatches, 51 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5454 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2702, Invalid=9070, Unknown=0, NotChecked=0, Total=11772 [2023-11-29 01:39:53,378 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 297 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:39:53,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 238 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:39:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-29 01:39:53,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2023-11-29 01:39:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 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 01:39:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2023-11-29 01:39:53,437 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2023-11-29 01:39:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:39:53,437 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2023-11-29 01:39:53,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:39:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2023-11-29 01:39:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-29 01:39:53,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:39:53,438 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2023-11-29 01:39:53,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-29 01:39:53,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 01:39:53,639 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:39:53,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:39:53,639 INFO L85 PathProgramCache]: Analyzing trace with hash 636527450, now seen corresponding path program 48 times [2023-11-29 01:39:53,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:39:53,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151923622] [2023-11-29 01:39:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:53,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:39:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:39:55,665 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 01:39:55,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:39:55,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151923622] [2023-11-29 01:39:55,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151923622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:39:55,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920867378] [2023-11-29 01:39:55,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:39:55,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:55,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:39:55,666 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:39:55,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 01:39:59,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2023-11-29 01:39:59,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:39:59,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 119 conjunts are in the unsatisfiable core [2023-11-29 01:39:59,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:39:59,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:40:01,087 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 01:40:01,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:01,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:40:01,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:40:01,387 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 01:40:01,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920867378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:40:01,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:40:01,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 57, 57] total 85 [2023-11-29 01:40:01,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34950850] [2023-11-29 01:40:01,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:40:01,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-11-29 01:40:01,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:40:01,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-11-29 01:40:01,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=6914, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 01:40:01,390 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 85 states, 85 states have (on average 2.223529411764706) internal successors, (189), 85 states have internal predecessors, (189), 0 states have call successors, (0), 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 01:40:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:04,242 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2023-11-29 01:40:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-29 01:40:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.223529411764706) internal successors, (189), 85 states have internal predecessors, (189), 0 states have call successors, (0), 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 01:40:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:04,243 INFO L225 Difference]: With dead ends: 115 [2023-11-29 01:40:04,243 INFO L226 Difference]: Without dead ends: 113 [2023-11-29 01:40:04,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=423, Invalid=12233, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 01:40:04,244 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 5575 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 5604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 5575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:04,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1715 Invalid, 5604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 5575 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 01:40:04,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-29 01:40:04,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2023-11-29 01:40:04,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 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 01:40:04,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2023-11-29 01:40:04,291 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2023-11-29 01:40:04,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:04,291 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2023-11-29 01:40:04,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.223529411764706) internal successors, (189), 85 states have internal predecessors, (189), 0 states have call successors, (0), 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 01:40:04,292 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2023-11-29 01:40:04,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-29 01:40:04,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:04,292 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:04,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-29 01:40:04,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:04,493 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:40:04,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:04,493 INFO L85 PathProgramCache]: Analyzing trace with hash 513444579, now seen corresponding path program 49 times [2023-11-29 01:40:04,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:04,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84494822] [2023-11-29 01:40:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:04,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 951 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:40:05,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:05,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84494822] [2023-11-29 01:40:05,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84494822] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:40:05,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236684340] [2023-11-29 01:40:05,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:40:05,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:05,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:05,808 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:05,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-29 01:40:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:06,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 01:40:06,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:40:07,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:40:08,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236684340] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:40:08,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:40:08,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 86 [2023-11-29 01:40:08,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535098160] [2023-11-29 01:40:08,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:40:08,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-11-29 01:40:08,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:40:08,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-11-29 01:40:08,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1685, Invalid=5625, Unknown=0, NotChecked=0, Total=7310 [2023-11-29 01:40:08,107 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 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 01:40:08,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:08,767 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2023-11-29 01:40:08,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 01:40:08,768 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-11-29 01:40:08,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:08,769 INFO L225 Difference]: With dead ends: 204 [2023-11-29 01:40:08,769 INFO L226 Difference]: Without dead ends: 119 [2023-11-29 01:40:08,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 140 SyntacticMatches, 53 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5867 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2900, Invalid=9756, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 01:40:08,770 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 461 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:08,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 231 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:40:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-29 01:40:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2023-11-29 01:40:08,818 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 01:40:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2023-11-29 01:40:08,818 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2023-11-29 01:40:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:08,818 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2023-11-29 01:40:08,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 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 01:40:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2023-11-29 01:40:08,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-29 01:40:08,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:08,819 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:08,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-29 01:40:09,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:09,019 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:40:09,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:09,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1745129917, now seen corresponding path program 50 times [2023-11-29 01:40:09,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:09,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486806726] [2023-11-29 01:40:09,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:09,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:11,144 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 01:40:11,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:11,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486806726] [2023-11-29 01:40:11,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486806726] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:40:11,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460670693] [2023-11-29 01:40:11,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:40:11,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:11,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:11,146 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:11,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-29 01:40:11,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:40:11,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:40:11,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 120 conjunts are in the unsatisfiable core [2023-11-29 01:40:11,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:12,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:40:15,067 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 01:40:15,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:15,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:40:15,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:40:15,307 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 01:40:15,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460670693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:40:15,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:40:15,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 115 [2023-11-29 01:40:15,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467335677] [2023-11-29 01:40:15,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:40:15,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2023-11-29 01:40:15,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:40:15,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2023-11-29 01:40:15,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=12770, Unknown=0, NotChecked=0, Total=13110 [2023-11-29 01:40:15,309 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 115 states, 115 states have (on average 1.9652173913043478) internal successors, (226), 115 states have internal predecessors, (226), 0 states have call successors, (0), 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 01:40:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:18,631 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2023-11-29 01:40:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-29 01:40:18,632 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.9652173913043478) internal successors, (226), 115 states have internal predecessors, (226), 0 states have call successors, (0), 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 01:40:18,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:18,632 INFO L225 Difference]: With dead ends: 119 [2023-11-29 01:40:18,632 INFO L226 Difference]: Without dead ends: 117 [2023-11-29 01:40:18,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3489 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=563, Invalid=19743, Unknown=0, NotChecked=0, Total=20306 [2023-11-29 01:40:18,633 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 17 mSDsluCounter, 2500 mSDsCounter, 0 mSdLazyCounter, 7286 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2531 SdHoareTripleChecker+Invalid, 7315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 7286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:18,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2531 Invalid, 7315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 7286 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 01:40:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-29 01:40:18,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2023-11-29 01:40:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 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 01:40:18,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2023-11-29 01:40:18,683 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2023-11-29 01:40:18,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:18,683 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2023-11-29 01:40:18,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.9652173913043478) internal successors, (226), 115 states have internal predecessors, (226), 0 states have call successors, (0), 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 01:40:18,683 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2023-11-29 01:40:18,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-29 01:40:18,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:18,684 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:18,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-29 01:40:18,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:18,884 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:40:18,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1408967264, now seen corresponding path program 51 times [2023-11-29 01:40:18,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:18,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936743438] [2023-11-29 01:40:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:18,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:40:20,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:20,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936743438] [2023-11-29 01:40:20,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936743438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:40:20,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347038853] [2023-11-29 01:40:20,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:40:20,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:20,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:20,258 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:20,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-29 01:40:27,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2023-11-29 01:40:27,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:40:27,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 01:40:27,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:40:28,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:40:29,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347038853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:40:29,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:40:29,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 89 [2023-11-29 01:40:29,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693032228] [2023-11-29 01:40:29,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:40:29,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-11-29 01:40:29,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:40:29,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-11-29 01:40:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1803, Invalid=6029, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 01:40:29,334 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 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 01:40:30,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:30,012 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2023-11-29 01:40:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 01:40:30,013 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 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 115 [2023-11-29 01:40:30,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:30,014 INFO L225 Difference]: With dead ends: 211 [2023-11-29 01:40:30,014 INFO L226 Difference]: Without dead ends: 123 [2023-11-29 01:40:30,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 145 SyntacticMatches, 55 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6295 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3105, Invalid=10467, Unknown=0, NotChecked=0, Total=13572 [2023-11-29 01:40:30,015 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 299 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:30,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 277 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:40:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-29 01:40:30,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2023-11-29 01:40:30,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2023-11-29 01:40:30,074 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2023-11-29 01:40:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:30,074 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2023-11-29 01:40:30,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 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 01:40:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2023-11-29 01:40:30,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-29 01:40:30,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:30,075 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:30,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-11-29 01:40:30,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-29 01:40:30,276 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:40:30,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1862539398, now seen corresponding path program 52 times [2023-11-29 01:40:30,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:30,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109320819] [2023-11-29 01:40:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:30,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:32,545 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 01:40:32,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:32,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109320819] [2023-11-29 01:40:32,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109320819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:40:32,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305347418] [2023-11-29 01:40:32,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:40:32,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:32,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:32,546 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:32,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-29 01:40:33,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:40:33,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:40:33,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 127 conjunts are in the unsatisfiable core [2023-11-29 01:40:33,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:33,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:40:35,704 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 01:40:35,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:36,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:40:36,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:40:36,035 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 01:40:36,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305347418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:40:36,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:40:36,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 61, 61] total 91 [2023-11-29 01:40:36,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401639822] [2023-11-29 01:40:36,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:40:36,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-29 01:40:36,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:40:36,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-29 01:40:36,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=7948, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 01:40:36,037 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 91 states, 91 states have (on average 2.230769230769231) internal successors, (203), 91 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 01:40:39,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:39,554 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2023-11-29 01:40:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-11-29 01:40:39,554 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.230769230769231) internal successors, (203), 91 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 116 [2023-11-29 01:40:39,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:39,555 INFO L225 Difference]: With dead ends: 123 [2023-11-29 01:40:39,555 INFO L226 Difference]: Without dead ends: 121 [2023-11-29 01:40:39,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=453, Invalid=14067, Unknown=0, NotChecked=0, Total=14520 [2023-11-29 01:40:39,556 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 6633 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2072 SdHoareTripleChecker+Invalid, 6663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 6633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:39,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2072 Invalid, 6663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 6633 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 01:40:39,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-29 01:40:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2023-11-29 01:40:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 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 01:40:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2023-11-29 01:40:39,608 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2023-11-29 01:40:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:39,608 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2023-11-29 01:40:39,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.230769230769231) internal successors, (203), 91 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 01:40:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2023-11-29 01:40:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-29 01:40:39,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:39,608 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:39,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-11-29 01:40:39,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-11-29 01:40:39,809 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:40:39,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:39,809 INFO L85 PathProgramCache]: Analyzing trace with hash -223915325, now seen corresponding path program 53 times [2023-11-29 01:40:39,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:39,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662365142] [2023-11-29 01:40:39,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:39,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1108 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:40:41,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:41,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662365142] [2023-11-29 01:40:41,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662365142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:40:41,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049503632] [2023-11-29 01:40:41,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:40:41,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:41,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:41,303 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:41,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-29 01:40:42,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2023-11-29 01:40:42,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:40:42,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 01:40:42,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:40:44,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:40:45,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049503632] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:40:45,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:40:45,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 92 [2023-11-29 01:40:45,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537270102] [2023-11-29 01:40:45,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:40:45,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-11-29 01:40:45,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:40:45,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-11-29 01:40:45,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1925, Invalid=6447, Unknown=0, NotChecked=0, Total=8372 [2023-11-29 01:40:45,199 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 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 01:40:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:45,869 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2023-11-29 01:40:45,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 01:40:45,869 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 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 119 [2023-11-29 01:40:45,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:45,870 INFO L225 Difference]: With dead ends: 218 [2023-11-29 01:40:45,870 INFO L226 Difference]: Without dead ends: 127 [2023-11-29 01:40:45,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 150 SyntacticMatches, 57 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6738 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3317, Invalid=11203, Unknown=0, NotChecked=0, Total=14520 [2023-11-29 01:40:45,871 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 313 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:45,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 269 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:40:45,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-29 01:40:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2023-11-29 01:40:45,927 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 01:40:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2023-11-29 01:40:45,927 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2023-11-29 01:40:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:45,927 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2023-11-29 01:40:45,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 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 01:40:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2023-11-29 01:40:45,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-29 01:40:45,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:45,928 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:45,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-11-29 01:40:46,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-29 01:40:46,128 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:40:46,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:46,128 INFO L85 PathProgramCache]: Analyzing trace with hash 250732445, now seen corresponding path program 54 times [2023-11-29 01:40:46,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:46,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547251429] [2023-11-29 01:40:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:46,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:49,018 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 01:40:49,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:49,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547251429] [2023-11-29 01:40:49,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547251429] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:40:49,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170030108] [2023-11-29 01:40:49,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:40:49,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:49,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:49,019 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:49,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-29 01:40:54,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2023-11-29 01:40:54,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:40:54,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 126 conjunts are in the unsatisfiable core [2023-11-29 01:40:54,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:56,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:40:58,782 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 01:40:58,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:41:01,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:41:01,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:41:01,501 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 01:41:01,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170030108] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:41:01,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:41:01,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 151 [2023-11-29 01:41:01,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917438678] [2023-11-29 01:41:01,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:41:01,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2023-11-29 01:41:01,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:41:01,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2023-11-29 01:41:01,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=22230, Unknown=0, NotChecked=0, Total=22650 [2023-11-29 01:41:01,504 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 151 states, 151 states have (on average 2.1456953642384105) internal successors, (324), 151 states have internal predecessors, (324), 0 states have call successors, (0), 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 01:41:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:41:09,080 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2023-11-29 01:41:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-29 01:41:09,081 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.1456953642384105) internal successors, (324), 151 states have internal predecessors, (324), 0 states have call successors, (0), 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 01:41:09,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:41:09,081 INFO L225 Difference]: With dead ends: 127 [2023-11-29 01:41:09,081 INFO L226 Difference]: Without dead ends: 125 [2023-11-29 01:41:09,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5339 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=911, Invalid=42561, Unknown=0, NotChecked=0, Total=43472 [2023-11-29 01:41:09,083 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 104 mSDsluCounter, 2647 mSDsCounter, 0 mSdLazyCounter, 7872 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 2680 SdHoareTripleChecker+Invalid, 7903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 7872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:41:09,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 2680 Invalid, 7903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 7872 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-29 01:41:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-29 01:41:09,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2023-11-29 01:41:09,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 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 01:41:09,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2023-11-29 01:41:09,134 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 120 [2023-11-29 01:41:09,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:41:09,134 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2023-11-29 01:41:09,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.1456953642384105) internal successors, (324), 151 states have internal predecessors, (324), 0 states have call successors, (0), 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 01:41:09,135 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2023-11-29 01:41:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-29 01:41:09,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:41:09,135 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2023-11-29 01:41:09,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-11-29 01:41:09,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-11-29 01:41:09,335 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:41:09,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:41:09,336 INFO L85 PathProgramCache]: Analyzing trace with hash 626934720, now seen corresponding path program 55 times [2023-11-29 01:41:09,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:41:09,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880112766] [2023-11-29 01:41:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:41:09,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:41:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:41:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1191 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:41:10,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:41:10,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880112766] [2023-11-29 01:41:10,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880112766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:41:10,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779603333] [2023-11-29 01:41:10,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:41:10,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:41:10,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:41:10,837 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:41:10,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-29 01:41:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:41:11,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 01:41:11,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:41:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:41:12,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:41:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:41:13,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779603333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:41:13,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:41:13,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 95 [2023-11-29 01:41:13,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584323168] [2023-11-29 01:41:13,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:41:13,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-11-29 01:41:13,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:41:13,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-11-29 01:41:13,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2051, Invalid=6879, Unknown=0, NotChecked=0, Total=8930 [2023-11-29 01:41:13,451 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 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 01:41:14,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:41:14,210 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2023-11-29 01:41:14,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-29 01:41:14,210 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 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 123 [2023-11-29 01:41:14,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:41:14,211 INFO L225 Difference]: With dead ends: 225 [2023-11-29 01:41:14,211 INFO L226 Difference]: Without dead ends: 131 [2023-11-29 01:41:14,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 155 SyntacticMatches, 59 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7196 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3536, Invalid=11964, Unknown=0, NotChecked=0, Total=15500 [2023-11-29 01:41:14,213 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 431 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:41:14,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 305 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:41:14,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-29 01:41:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2023-11-29 01:41:14,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 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 01:41:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2023-11-29 01:41:14,274 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2023-11-29 01:41:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:41:14,274 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2023-11-29 01:41:14,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 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 01:41:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2023-11-29 01:41:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 01:41:14,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:41:14,275 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2023-11-29 01:41:14,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-11-29 01:41:14,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-11-29 01:41:14,476 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:41:14,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:41:14,476 INFO L85 PathProgramCache]: Analyzing trace with hash -847064166, now seen corresponding path program 56 times [2023-11-29 01:41:14,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:41:14,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982661026] [2023-11-29 01:41:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:41:14,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:41:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:41:16,983 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 01:41:16,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:41:16,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982661026] [2023-11-29 01:41:16,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982661026] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:41:16,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377777788] [2023-11-29 01:41:16,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:41:16,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:41:16,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:41:16,984 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:41:16,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-29 01:41:17,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:41:17,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:41:17,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 132 conjunts are in the unsatisfiable core [2023-11-29 01:41:17,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:41:18,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:41:21,729 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 01:41:21,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:41:21,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:41:21,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:41:21,990 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 01:41:21,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377777788] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:41:21,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:41:21,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 127 [2023-11-29 01:41:21,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453369680] [2023-11-29 01:41:21,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:41:21,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2023-11-29 01:41:21,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:41:21,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2023-11-29 01:41:21,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=15626, Unknown=0, NotChecked=0, Total=16002 [2023-11-29 01:41:21,993 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 127 states, 127 states have (on average 1.968503937007874) internal successors, (250), 127 states have internal predecessors, (250), 0 states have call successors, (0), 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 01:41:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:41:26,067 INFO L93 Difference]: Finished difference Result 131 states and 132 transitions. [2023-11-29 01:41:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-11-29 01:41:26,068 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.968503937007874) internal successors, (250), 127 states have internal predecessors, (250), 0 states have call successors, (0), 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 01:41:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:41:26,068 INFO L225 Difference]: With dead ends: 131 [2023-11-29 01:41:26,068 INFO L226 Difference]: Without dead ends: 129 [2023-11-29 01:41:26,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4281 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=623, Invalid=24183, Unknown=0, NotChecked=0, Total=24806 [2023-11-29 01:41:26,070 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 2821 mSDsCounter, 0 mSdLazyCounter, 8623 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2855 SdHoareTripleChecker+Invalid, 8654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 8623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:41:26,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2855 Invalid, 8654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 8623 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 01:41:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-29 01:41:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2023-11-29 01:41:26,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 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 01:41:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2023-11-29 01:41:26,131 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2023-11-29 01:41:26,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:41:26,131 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2023-11-29 01:41:26,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.968503937007874) internal successors, (250), 127 states have internal predecessors, (250), 0 states have call successors, (0), 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 01:41:26,131 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2023-11-29 01:41:26,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-29 01:41:26,132 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:41:26,132 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2023-11-29 01:41:26,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-11-29 01:41:26,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-29 01:41:26,332 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:41:26,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:41:26,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1950911837, now seen corresponding path program 57 times [2023-11-29 01:41:26,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:41:26,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245531652] [2023-11-29 01:41:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:41:26,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:41:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:41:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1277 proven. 553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:41:27,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:41:27,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245531652] [2023-11-29 01:41:27,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245531652] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:41:27,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404667690] [2023-11-29 01:41:27,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:41:27,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:41:27,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:41:27,980 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:41:27,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-29 01:41:47,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2023-11-29 01:41:47,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:41:47,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 01:41:47,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:41:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:41:48,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:41:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:41:49,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404667690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:41:49,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:41:49,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 98 [2023-11-29 01:41:49,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325936378] [2023-11-29 01:41:49,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:41:49,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-11-29 01:41:49,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:41:49,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-11-29 01:41:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2181, Invalid=7325, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 01:41:49,915 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 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 01:41:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:41:50,677 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2023-11-29 01:41:50,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 01:41:50,678 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 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 127 [2023-11-29 01:41:50,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:41:50,678 INFO L225 Difference]: With dead ends: 232 [2023-11-29 01:41:50,678 INFO L226 Difference]: Without dead ends: 135 [2023-11-29 01:41:50,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 160 SyntacticMatches, 61 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7669 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3762, Invalid=12750, Unknown=0, NotChecked=0, Total=16512 [2023-11-29 01:41:50,680 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 299 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:41:50,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 297 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:41:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-29 01:41:50,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2023-11-29 01:41:50,733 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 01:41:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-11-29 01:41:50,733 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2023-11-29 01:41:50,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:41:50,734 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-11-29 01:41:50,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 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 01:41:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-11-29 01:41:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-29 01:41:50,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:41:50,734 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2023-11-29 01:41:50,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-11-29 01:41:50,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-29 01:41:50,935 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:41:50,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:41:50,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1828488573, now seen corresponding path program 58 times [2023-11-29 01:41:50,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:41:50,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658711602] [2023-11-29 01:41:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:41:50,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:41:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:41:53,708 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 01:41:53,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:41:53,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658711602] [2023-11-29 01:41:53,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658711602] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:41:53,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956015073] [2023-11-29 01:41:53,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:41:53,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:41:53,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:41:53,709 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:41:53,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-29 01:41:57,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:41:57,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:41:57,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 139 conjunts are in the unsatisfiable core [2023-11-29 01:41:57,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:41:57,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:41:59,613 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 01:41:59,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:41:59,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:41:59,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:41:59,905 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 01:41:59,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956015073] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:41:59,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:41:59,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 67, 67] total 100 [2023-11-29 01:41:59,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519255685] [2023-11-29 01:41:59,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:41:59,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-11-29 01:41:59,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:41:59,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-11-29 01:41:59,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=9634, Unknown=0, NotChecked=0, Total=9900 [2023-11-29 01:41:59,907 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 100 states, 100 states have (on average 2.24) internal successors, (224), 100 states have internal predecessors, (224), 0 states have call successors, (0), 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 01:42:03,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:42:03,956 INFO L93 Difference]: Finished difference Result 135 states and 136 transitions. [2023-11-29 01:42:03,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-11-29 01:42:03,956 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.24) internal successors, (224), 100 states have internal predecessors, (224), 0 states have call successors, (0), 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 01:42:03,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:42:03,957 INFO L225 Difference]: With dead ends: 135 [2023-11-29 01:42:03,957 INFO L226 Difference]: Without dead ends: 133 [2023-11-29 01:42:03,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=498, Invalid=17058, Unknown=0, NotChecked=0, Total=17556 [2023-11-29 01:42:03,958 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 2357 mSDsCounter, 0 mSdLazyCounter, 7442 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 7475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 7442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:42:03,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2391 Invalid, 7475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 7442 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-29 01:42:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-29 01:42:04,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2023-11-29 01:42:04,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 0 states have call successors, (0), 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 01:42:04,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2023-11-29 01:42:04,015 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2023-11-29 01:42:04,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:42:04,015 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2023-11-29 01:42:04,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.24) internal successors, (224), 100 states have internal predecessors, (224), 0 states have call successors, (0), 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 01:42:04,015 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2023-11-29 01:42:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-29 01:42:04,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:42:04,016 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2023-11-29 01:42:04,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-11-29 01:42:04,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:42:04,217 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:42:04,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:42:04,217 INFO L85 PathProgramCache]: Analyzing trace with hash -562343456, now seen corresponding path program 59 times [2023-11-29 01:42:04,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:42:04,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240509034] [2023-11-29 01:42:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:42:04,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:42:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:42:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1366 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:42:06,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:42:06,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240509034] [2023-11-29 01:42:06,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240509034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:42:06,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520108220] [2023-11-29 01:42:06,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:42:06,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:42:06,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:42:06,019 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:42:06,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-29 01:42:11,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2023-11-29 01:42:11,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:42:11,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 01:42:11,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:42:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:42:12,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:42:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:42:13,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520108220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:42:13,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:42:13,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 101 [2023-11-29 01:42:13,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395951461] [2023-11-29 01:42:13,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:42:13,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-29 01:42:13,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:42:13,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-29 01:42:13,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2315, Invalid=7785, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 01:42:13,988 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 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 01:42:14,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:42:14,756 INFO L93 Difference]: Finished difference Result 239 states and 241 transitions. [2023-11-29 01:42:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-29 01:42:14,757 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 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 131 [2023-11-29 01:42:14,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:42:14,758 INFO L225 Difference]: With dead ends: 239 [2023-11-29 01:42:14,758 INFO L226 Difference]: Without dead ends: 139 [2023-11-29 01:42:14,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 165 SyntacticMatches, 63 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8157 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3995, Invalid=13561, Unknown=0, NotChecked=0, Total=17556 [2023-11-29 01:42:14,759 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 343 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:42:14,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 316 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:42:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-29 01:42:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 133. [2023-11-29 01:42:14,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 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 01:42:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2023-11-29 01:42:14,823 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2023-11-29 01:42:14,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:42:14,823 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2023-11-29 01:42:14,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 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 01:42:14,824 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2023-11-29 01:42:14,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-29 01:42:14,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:42:14,824 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2023-11-29 01:42:14,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-11-29 01:42:15,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-11-29 01:42:15,025 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:42:15,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:42:15,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1629001798, now seen corresponding path program 60 times [2023-11-29 01:42:15,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:42:15,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242439335] [2023-11-29 01:42:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:42:15,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:42:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:42:17,902 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 01:42:17,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:42:17,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242439335] [2023-11-29 01:42:17,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242439335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:42:17,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957319455] [2023-11-29 01:42:17,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:42:17,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:42:17,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:42:17,903 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:42:17,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-29 01:42:26,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2023-11-29 01:42:26,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:42:26,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 180 conjunts are in the unsatisfiable core [2023-11-29 01:42:26,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:42:28,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:42:31,635 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 01:42:31,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:42:35,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:42:35,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:42:38,988 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 01:42:38,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957319455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:42:38,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:42:38,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 70, 70] total 203 [2023-11-29 01:42:38,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501745214] [2023-11-29 01:42:38,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:42:38,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-11-29 01:42:38,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:42:38,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-11-29 01:42:38,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2384, Invalid=38622, Unknown=0, NotChecked=0, Total=41006 [2023-11-29 01:42:38,993 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 203 states, 203 states have (on average 1.9261083743842364) internal successors, (391), 203 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 01:43:22,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:43:22,784 INFO L93 Difference]: Finished difference Result 338 states and 373 transitions. [2023-11-29 01:43:22,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2023-11-29 01:43:22,785 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.9261083743842364) internal successors, (391), 203 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 01:43:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:43:22,786 INFO L225 Difference]: With dead ends: 338 [2023-11-29 01:43:22,787 INFO L226 Difference]: Without dead ends: 336 [2023-11-29 01:43:22,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34068 ImplicationChecksByTransitivity, 51.6s TimeCoverageRelationStatistics Valid=8636, Invalid=126420, Unknown=0, NotChecked=0, Total=135056 [2023-11-29 01:43:22,792 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 879 mSDsluCounter, 4174 mSDsCounter, 0 mSdLazyCounter, 12624 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 4210 SdHoareTripleChecker+Invalid, 13147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 12624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:43:22,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 4210 Invalid, 13147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 12624 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-29 01:43:22,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-11-29 01:43:22,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 234. [2023-11-29 01:43:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0128755364806867) internal successors, (236), 233 states have internal predecessors, (236), 0 states have call successors, (0), 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 01:43:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2023-11-29 01:43:22,941 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 132 [2023-11-29 01:43:22,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:43:22,941 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2023-11-29 01:43:22,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.9261083743842364) internal successors, (391), 203 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 01:43:22,941 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2023-11-29 01:43:22,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-29 01:43:22,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:43:22,942 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2023-11-29 01:43:22,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-11-29 01:43:23,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-11-29 01:43:23,142 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:43:23,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:43:23,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1316846755, now seen corresponding path program 61 times [2023-11-29 01:43:23,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:43:23,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177027904] [2023-11-29 01:43:23,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:23,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:43:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:43:26,705 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 01:43:26,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:43:26,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177027904] [2023-11-29 01:43:26,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177027904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:43:26,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114451827] [2023-11-29 01:43:26,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:43:26,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:26,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:43:26,707 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:43:26,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-29 01:43:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:43:27,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 144 conjunts are in the unsatisfiable core [2023-11-29 01:43:27,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:43:27,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:43:29,817 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 01:43:29,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:43:32,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:43:32,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:43:35,769 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 01:43:35,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114451827] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:43:35,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:43:35,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 170 [2023-11-29 01:43:35,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22161487] [2023-11-29 01:43:35,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:43:35,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2023-11-29 01:43:35,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:43:35,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2023-11-29 01:43:35,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=28195, Unknown=0, NotChecked=0, Total=28730 [2023-11-29 01:43:35,773 INFO L87 Difference]: Start difference. First operand 234 states and 236 transitions. Second operand has 170 states, 170 states have (on average 2.1470588235294117) internal successors, (365), 170 states have internal predecessors, (365), 0 states have call successors, (0), 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 01:43:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:43:42,733 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2023-11-29 01:43:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-11-29 01:43:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.1470588235294117) internal successors, (365), 170 states have internal predecessors, (365), 0 states have call successors, (0), 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 01:43:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:43:42,735 INFO L225 Difference]: With dead ends: 340 [2023-11-29 01:43:42,735 INFO L226 Difference]: Without dead ends: 338 [2023-11-29 01:43:42,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6799 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=842, Invalid=40978, Unknown=0, NotChecked=0, Total=41820 [2023-11-29 01:43:42,737 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 28 mSDsluCounter, 4288 mSDsCounter, 0 mSdLazyCounter, 11715 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 4331 SdHoareTripleChecker+Invalid, 11751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 11715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:43:42,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 4331 Invalid, 11751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 11715 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-29 01:43:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-11-29 01:43:42,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 234. [2023-11-29 01:43:42,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0128755364806867) internal successors, (236), 233 states have internal predecessors, (236), 0 states have call successors, (0), 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 01:43:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2023-11-29 01:43:42,918 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 136 [2023-11-29 01:43:42,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:43:42,918 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2023-11-29 01:43:42,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.1470588235294117) internal successors, (365), 170 states have internal predecessors, (365), 0 states have call successors, (0), 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 01:43:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2023-11-29 01:43:42,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 01:43:42,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:43:42,919 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2023-11-29 01:43:42,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-11-29 01:43:43,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-11-29 01:43:43,119 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:43:43,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:43:43,119 INFO L85 PathProgramCache]: Analyzing trace with hash 54396928, now seen corresponding path program 62 times [2023-11-29 01:43:43,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:43:43,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622419243] [2023-11-29 01:43:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:43,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:43:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:43:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1553 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:43:45,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:43:45,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622419243] [2023-11-29 01:43:45,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622419243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:43:45,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427568674] [2023-11-29 01:43:45,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:43:45,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:45,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:43:45,061 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:43:45,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-29 01:43:45,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:43:45,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:43:45,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-29 01:43:45,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:43:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:43:47,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:43:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:43:48,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427568674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:43:48,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:43:48,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 107 [2023-11-29 01:43:48,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311485726] [2023-11-29 01:43:48,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:43:48,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-11-29 01:43:48,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:43:48,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-11-29 01:43:48,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2595, Invalid=8747, Unknown=0, NotChecked=0, Total=11342 [2023-11-29 01:43:48,385 INFO L87 Difference]: Start difference. First operand 234 states and 236 transitions. Second operand has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 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 01:43:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:43:50,064 INFO L93 Difference]: Finished difference Result 445 states and 448 transitions. [2023-11-29 01:43:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-11-29 01:43:50,065 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 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 139 [2023-11-29 01:43:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:43:50,065 INFO L225 Difference]: With dead ends: 445 [2023-11-29 01:43:50,065 INFO L226 Difference]: Without dead ends: 147 [2023-11-29 01:43:50,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 175 SyntacticMatches, 67 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12016 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6406, Invalid=24044, Unknown=0, NotChecked=0, Total=30450 [2023-11-29 01:43:50,068 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 657 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:43:50,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 383 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:43:50,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-29 01:43:50,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2023-11-29 01:43:50,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 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 01:43:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2023-11-29 01:43:50,175 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2023-11-29 01:43:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:43:50,175 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2023-11-29 01:43:50,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 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 01:43:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2023-11-29 01:43:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-29 01:43:50,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:43:50,176 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2023-11-29 01:43:50,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-11-29 01:43:50,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:50,376 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:43:50,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:43:50,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1997251546, now seen corresponding path program 63 times [2023-11-29 01:43:50,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:43:50,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437798963] [2023-11-29 01:43:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:50,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:43:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:43:53,510 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 01:43:53,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:43:53,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437798963] [2023-11-29 01:43:53,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437798963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:43:53,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512703312] [2023-11-29 01:43:53,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:43:53,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:53,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:43:53,512 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:43:53,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-11-29 01:44:13,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2023-11-29 01:44:13,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:44:13,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 146 conjunts are in the unsatisfiable core [2023-11-29 01:44:13,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:13,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:44:15,863 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 01:44:15,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:44:16,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:44:16,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:44:16,157 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 01:44:16,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512703312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:44:16,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:44:16,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 107 [2023-11-29 01:44:16,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220357223] [2023-11-29 01:44:16,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:44:16,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-11-29 01:44:16,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:16,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-11-29 01:44:16,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=11062, Unknown=0, NotChecked=0, Total=11342 [2023-11-29 01:44:16,159 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 107 states, 107 states have (on average 2.2710280373831777) internal successors, (243), 107 states have internal predecessors, (243), 0 states have call successors, (0), 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 01:44:20,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:20,658 INFO L93 Difference]: Finished difference Result 147 states and 148 transitions. [2023-11-29 01:44:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-11-29 01:44:20,658 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.2710280373831777) internal successors, (243), 107 states have internal predecessors, (243), 0 states have call successors, (0), 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 01:44:20,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:20,659 INFO L225 Difference]: With dead ends: 147 [2023-11-29 01:44:20,659 INFO L226 Difference]: Without dead ends: 145 [2023-11-29 01:44:20,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2348 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=523, Invalid=19499, Unknown=0, NotChecked=0, Total=20022 [2023-11-29 01:44:20,660 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 2998 mSDsCounter, 0 mSdLazyCounter, 8796 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3036 SdHoareTripleChecker+Invalid, 8831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 8796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:20,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3036 Invalid, 8831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 8796 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 01:44:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-29 01:44:20,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2023-11-29 01:44:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 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 01:44:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2023-11-29 01:44:20,770 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2023-11-29 01:44:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:20,770 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2023-11-29 01:44:20,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.2710280373831777) internal successors, (243), 107 states have internal predecessors, (243), 0 states have call successors, (0), 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 01:44:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2023-11-29 01:44:20,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-29 01:44:20,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:20,771 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:20,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-11-29 01:44:20,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:20,971 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:44:20,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:20,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1943648867, now seen corresponding path program 64 times [2023-11-29 01:44:20,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:20,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393101170] [2023-11-29 01:44:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:20,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1651 proven. 695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:44:23,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:23,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393101170] [2023-11-29 01:44:23,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393101170] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:44:23,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564665535] [2023-11-29 01:44:23,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:44:23,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:23,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:23,105 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:23,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-11-29 01:44:26,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:44:26,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:44:26,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-29 01:44:26,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:44:28,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:44:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:44:29,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564665535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:44:29,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:44:29,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 110 [2023-11-29 01:44:29,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846018050] [2023-11-29 01:44:29,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:44:29,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-11-29 01:44:29,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:29,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-11-29 01:44:29,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2741, Invalid=9249, Unknown=0, NotChecked=0, Total=11990 [2023-11-29 01:44:29,860 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 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 01:44:30,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:30,876 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2023-11-29 01:44:30,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-29 01:44:30,877 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 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 143 [2023-11-29 01:44:30,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:30,877 INFO L225 Difference]: With dead ends: 260 [2023-11-29 01:44:30,877 INFO L226 Difference]: Without dead ends: 151 [2023-11-29 01:44:30,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 180 SyntacticMatches, 69 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9711 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4736, Invalid=16144, Unknown=0, NotChecked=0, Total=20880 [2023-11-29 01:44:30,879 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 455 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:30,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 359 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:44:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-29 01:44:30,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2023-11-29 01:44:30,980 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 01:44:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2023-11-29 01:44:30,990 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2023-11-29 01:44:30,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:30,990 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2023-11-29 01:44:30,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 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 01:44:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2023-11-29 01:44:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-29 01:44:30,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:30,991 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:31,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-11-29 01:44:31,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:31,191 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:44:31,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:31,192 INFO L85 PathProgramCache]: Analyzing trace with hash -849225411, now seen corresponding path program 65 times [2023-11-29 01:44:31,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:31,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578792083] [2023-11-29 01:44:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:31,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:34,612 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 01:44:34,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:34,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578792083] [2023-11-29 01:44:34,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578792083] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:44:34,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076644891] [2023-11-29 01:44:34,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:44:34,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:34,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:34,614 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:34,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-11-29 01:44:43,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2023-11-29 01:44:43,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:44:43,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 157 conjunts are in the unsatisfiable core [2023-11-29 01:44:43,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:45,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:44:49,031 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 01:44:49,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:44:49,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:44:49,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:44:49,469 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 01:44:49,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076644891] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:44:49,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:44:49,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 75, 75] total 149 [2023-11-29 01:44:49,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142194234] [2023-11-29 01:44:49,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:44:49,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2023-11-29 01:44:49,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:49,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2023-11-29 01:44:49,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=21605, Unknown=0, NotChecked=0, Total=22052 [2023-11-29 01:44:49,471 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 149 states, 149 states have (on average 1.9597315436241611) internal successors, (292), 149 states have internal predecessors, (292), 0 states have call successors, (0), 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 01:44:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:55,294 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2023-11-29 01:44:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-11-29 01:44:55,294 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.9597315436241611) internal successors, (292), 149 states have internal predecessors, (292), 0 states have call successors, (0), 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 144 [2023-11-29 01:44:55,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:55,295 INFO L225 Difference]: With dead ends: 151 [2023-11-29 01:44:55,295 INFO L226 Difference]: Without dead ends: 149 [2023-11-29 01:44:55,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=745, Invalid=33665, Unknown=0, NotChecked=0, Total=34410 [2023-11-29 01:44:55,297 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 3987 mSDsCounter, 0 mSdLazyCounter, 12688 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 4025 SdHoareTripleChecker+Invalid, 12726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 12688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:55,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 4025 Invalid, 12726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 12688 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 01:44:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-29 01:44:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2023-11-29 01:44:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 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 01:44:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2023-11-29 01:44:55,417 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2023-11-29 01:44:55,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:55,417 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2023-11-29 01:44:55,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.9597315436241611) internal successors, (292), 149 states have internal predecessors, (292), 0 states have call successors, (0), 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 01:44:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2023-11-29 01:44:55,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-29 01:44:55,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:55,418 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:55,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-11-29 01:44:55,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:55,619 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:44:55,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:55,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1912052192, now seen corresponding path program 66 times [2023-11-29 01:44:55,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:55,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486978601] [2023-11-29 01:44:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:55,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1752 proven. 733 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:44:57,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:57,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486978601] [2023-11-29 01:44:57,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486978601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:44:57,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857613532] [2023-11-29 01:44:57,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:44:57,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:57,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:57,808 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:57,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-11-29 01:45:13,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2023-11-29 01:45:13,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:45:14,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-29 01:45:14,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:45:15,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:45:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:45:17,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857613532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:45:17,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:45:17,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 113 [2023-11-29 01:45:17,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53056010] [2023-11-29 01:45:17,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:45:17,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-11-29 01:45:17,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:17,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-11-29 01:45:17,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2891, Invalid=9765, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 01:45:17,303 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 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 01:45:18,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:18,370 INFO L93 Difference]: Finished difference Result 267 states and 269 transitions. [2023-11-29 01:45:18,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-29 01:45:18,370 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 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 147 [2023-11-29 01:45:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:18,371 INFO L225 Difference]: With dead ends: 267 [2023-11-29 01:45:18,371 INFO L226 Difference]: Without dead ends: 155 [2023-11-29 01:45:18,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 185 SyntacticMatches, 71 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10259 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4997, Invalid=17055, Unknown=0, NotChecked=0, Total=22052 [2023-11-29 01:45:18,373 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 503 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:18,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 351 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:45:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-29 01:45:18,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 149. [2023-11-29 01:45:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 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 01:45:18,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2023-11-29 01:45:18,474 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 147 [2023-11-29 01:45:18,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:18,474 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2023-11-29 01:45:18,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 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 01:45:18,474 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2023-11-29 01:45:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-29 01:45:18,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:18,475 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:18,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-11-29 01:45:18,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-29 01:45:18,675 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:45:18,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1773041670, now seen corresponding path program 67 times [2023-11-29 01:45:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:18,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872194075] [2023-11-29 01:45:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:18,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:45:22,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:22,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872194075] [2023-11-29 01:45:22,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872194075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:45:22,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690678682] [2023-11-29 01:45:22,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:45:22,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:22,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:22,170 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:22,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-11-29 01:45:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:22,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 156 conjunts are in the unsatisfiable core [2023-11-29 01:45:22,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:24,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:45:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:45:28,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:45:28,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:45:28,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:45:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:45:28,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690678682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:45:28,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:45:28,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 151 [2023-11-29 01:45:28,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985816843] [2023-11-29 01:45:28,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:45:28,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2023-11-29 01:45:28,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:28,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2023-11-29 01:45:28,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=22202, Unknown=0, NotChecked=0, Total=22650 [2023-11-29 01:45:29,000 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 151 states, 151 states have (on average 1.9735099337748345) internal successors, (298), 151 states have internal predecessors, (298), 0 states have call successors, (0), 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 01:45:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:34,572 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2023-11-29 01:45:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-11-29 01:45:34,573 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.9735099337748345) internal successors, (298), 151 states have internal predecessors, (298), 0 states have call successors, (0), 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 148 [2023-11-29 01:45:34,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:34,574 INFO L225 Difference]: With dead ends: 155 [2023-11-29 01:45:34,574 INFO L226 Difference]: Without dead ends: 153 [2023-11-29 01:45:34,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6108 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=743, Invalid=34413, Unknown=0, NotChecked=0, Total=35156 [2023-11-29 01:45:34,575 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 3877 mSDsCounter, 0 mSdLazyCounter, 11625 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3917 SdHoareTripleChecker+Invalid, 11663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 11625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:34,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3917 Invalid, 11663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 11625 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-29 01:45:34,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-29 01:45:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2023-11-29 01:45:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 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 01:45:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2023-11-29 01:45:34,678 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2023-11-29 01:45:34,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:34,678 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2023-11-29 01:45:34,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.9735099337748345) internal successors, (298), 151 states have internal predecessors, (298), 0 states have call successors, (0), 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 01:45:34,678 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2023-11-29 01:45:34,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-29 01:45:34,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:34,679 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:34,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-11-29 01:45:34,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-11-29 01:45:34,880 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:45:34,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:34,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1171791293, now seen corresponding path program 68 times [2023-11-29 01:45:34,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:34,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603110981] [2023-11-29 01:45:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:34,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1856 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:45:37,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:37,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603110981] [2023-11-29 01:45:37,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603110981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:45:37,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312832999] [2023-11-29 01:45:37,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:45:37,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:37,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:37,279 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:37,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-11-29 01:45:37,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:45:37,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:45:37,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-29 01:45:37,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:45:39,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:45:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:45:41,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312832999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:45:41,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:45:41,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 116 [2023-11-29 01:45:41,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867004523] [2023-11-29 01:45:41,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:45:41,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-11-29 01:45:41,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:41,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-11-29 01:45:41,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3045, Invalid=10295, Unknown=0, NotChecked=0, Total=13340 [2023-11-29 01:45:41,151 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 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 01:45:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:42,294 INFO L93 Difference]: Finished difference Result 274 states and 276 transitions. [2023-11-29 01:45:42,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 01:45:42,295 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 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 151 [2023-11-29 01:45:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:42,296 INFO L225 Difference]: With dead ends: 274 [2023-11-29 01:45:42,296 INFO L226 Difference]: Without dead ends: 159 [2023-11-29 01:45:42,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 190 SyntacticMatches, 73 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10822 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5265, Invalid=17991, Unknown=0, NotChecked=0, Total=23256 [2023-11-29 01:45:42,297 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 513 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:42,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 373 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:45:42,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-29 01:45:42,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 153. [2023-11-29 01:45:42,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 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 01:45:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2023-11-29 01:45:42,401 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 151 [2023-11-29 01:45:42,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:42,401 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2023-11-29 01:45:42,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 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 01:45:42,401 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2023-11-29 01:45:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-29 01:45:42,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:42,402 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:42,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2023-11-29 01:45:42,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2023-11-29 01:45:42,602 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:45:42,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:42,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1392019229, now seen corresponding path program 69 times [2023-11-29 01:45:42,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:42,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808455910] [2023-11-29 01:45:42,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:42,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:45:46,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:46,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808455910] [2023-11-29 01:45:46,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808455910] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:45:46,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349572374] [2023-11-29 01:45:46,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:45:46,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:46,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:46,935 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:46,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-11-29 01:46:33,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2023-11-29 01:46:33,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:33,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 158 conjunts are in the unsatisfiable core [2023-11-29 01:46:33,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:35,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:46:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:46:40,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:44,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:46:44,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:46:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:46:44,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349572374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:44,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:44,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 191 [2023-11-29 01:46:44,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099763096] [2023-11-29 01:46:44,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:44,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2023-11-29 01:46:44,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:44,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2023-11-29 01:46:44,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=35758, Unknown=0, NotChecked=0, Total=36290 [2023-11-29 01:46:44,948 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 191 states, 191 states have (on average 2.157068062827225) internal successors, (412), 191 states have internal predecessors, (412), 0 states have call successors, (0), 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 01:46:58,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:58,217 INFO L93 Difference]: Finished difference Result 159 states and 160 transitions. [2023-11-29 01:46:58,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-11-29 01:46:58,218 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 2.157068062827225) internal successors, (412), 191 states have internal predecessors, (412), 0 states have call successors, (0), 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 152 [2023-11-29 01:46:58,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:58,218 INFO L225 Difference]: With dead ends: 159 [2023-11-29 01:46:58,218 INFO L226 Difference]: Without dead ends: 157 [2023-11-29 01:46:58,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8587 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=1159, Invalid=68801, Unknown=0, NotChecked=0, Total=69960 [2023-11-29 01:46:58,221 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 125 mSDsluCounter, 4618 mSDsCounter, 0 mSdLazyCounter, 14080 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 4659 SdHoareTripleChecker+Invalid, 14119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 14080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:58,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 4659 Invalid, 14119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 14080 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-11-29 01:46:58,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-29 01:46:58,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2023-11-29 01:46:58,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 0 states have call successors, (0), 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 01:46:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2023-11-29 01:46:58,358 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2023-11-29 01:46:58,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:58,358 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2023-11-29 01:46:58,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 2.157068062827225) internal successors, (412), 191 states have internal predecessors, (412), 0 states have call successors, (0), 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 01:46:58,358 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2023-11-29 01:46:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-29 01:46:58,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:58,358 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:58,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-11-29 01:46:58,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:58,559 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:58,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1740401728, now seen corresponding path program 70 times [2023-11-29 01:46:58,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:58,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666504839] [2023-11-29 01:46:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:58,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:47:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 1963 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:47:01,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:47:01,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666504839] [2023-11-29 01:47:01,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666504839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:47:01,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141795160] [2023-11-29 01:47:01,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:47:01,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:01,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:47:01,122 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:47:01,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-11-29 01:47:11,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:47:11,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:47:11,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-29 01:47:11,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:47:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:47:13,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:47:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:47:14,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141795160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:47:14,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:47:14,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 119 [2023-11-29 01:47:14,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204473358] [2023-11-29 01:47:14,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:47:14,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-11-29 01:47:14,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:47:14,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-11-29 01:47:14,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3203, Invalid=10839, Unknown=0, NotChecked=0, Total=14042 [2023-11-29 01:47:14,969 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 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 01:47:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:47:16,110 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2023-11-29 01:47:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-29 01:47:16,110 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 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 155 [2023-11-29 01:47:16,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:47:16,111 INFO L225 Difference]: With dead ends: 281 [2023-11-29 01:47:16,111 INFO L226 Difference]: Without dead ends: 163 [2023-11-29 01:47:16,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 195 SyntacticMatches, 75 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5540, Invalid=18952, Unknown=0, NotChecked=0, Total=24492 [2023-11-29 01:47:16,113 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 403 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:47:16,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 388 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:47:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-29 01:47:16,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2023-11-29 01:47:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 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 01:47:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2023-11-29 01:47:16,232 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 155 [2023-11-29 01:47:16,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:47:16,232 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2023-11-29 01:47:16,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 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 01:47:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2023-11-29 01:47:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-29 01:47:16,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:47:16,233 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2023-11-29 01:47:16,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-11-29 01:47:16,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:16,433 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:47:16,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:47:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash 731583514, now seen corresponding path program 71 times [2023-11-29 01:47:16,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:47:16,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803895654] [2023-11-29 01:47:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:47:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:47:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:47:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 0 proven. 2813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:47:20,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:47:20,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803895654] [2023-11-29 01:47:20,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803895654] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:47:20,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858807942] [2023-11-29 01:47:20,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:47:20,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:20,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:47:20,465 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:47:20,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-11-29 01:47:25,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2023-11-29 01:47:25,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:47:25,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 169 conjunts are in the unsatisfiable core [2023-11-29 01:47:25,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:47:28,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:47:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 0 proven. 2813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:47:32,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:47:32,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:47:32,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:47:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 0 proven. 2813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:47:32,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858807942] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:47:32,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:47:32,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 81, 81] total 161 [2023-11-29 01:47:32,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247699233] [2023-11-29 01:47:32,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:47:32,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2023-11-29 01:47:32,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:47:32,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2023-11-29 01:47:32,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=25277, Unknown=0, NotChecked=0, Total=25760 [2023-11-29 01:47:32,931 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 161 states, 161 states have (on average 1.9627329192546583) internal successors, (316), 161 states have internal predecessors, (316), 0 states have call successors, (0), 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 01:47:39,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:47:39,403 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2023-11-29 01:47:39,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-11-29 01:47:39,403 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.9627329192546583) internal successors, (316), 161 states have internal predecessors, (316), 0 states have call successors, (0), 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 156 [2023-11-29 01:47:39,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:47:39,404 INFO L225 Difference]: With dead ends: 163 [2023-11-29 01:47:39,404 INFO L226 Difference]: Without dead ends: 161 [2023-11-29 01:47:39,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7106 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=805, Invalid=39395, Unknown=0, NotChecked=0, Total=40200 [2023-11-29 01:47:39,406 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 4252 mSDsCounter, 0 mSdLazyCounter, 13104 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 13145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 13104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:47:39,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4293 Invalid, 13145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 13104 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-29 01:47:39,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-29 01:47:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2023-11-29 01:47:39,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 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 01:47:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2023-11-29 01:47:39,513 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 156 [2023-11-29 01:47:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:47:39,513 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2023-11-29 01:47:39,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.9627329192546583) internal successors, (316), 161 states have internal predecessors, (316), 0 states have call successors, (0), 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 01:47:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2023-11-29 01:47:39,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-29 01:47:39,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:47:39,514 INFO L195 NwaCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2023-11-29 01:47:39,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-11-29 01:47:39,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:39,715 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:47:39,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:47:39,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1945199139, now seen corresponding path program 72 times [2023-11-29 01:47:39,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:47:39,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827238160] [2023-11-29 01:47:39,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:47:39,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:47:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:47:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2073 proven. 853 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:47:42,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:47:42,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827238160] [2023-11-29 01:47:42,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827238160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:47:42,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504147174] [2023-11-29 01:47:42,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:47:42,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:42,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:47:42,341 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:47:42,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-11-29 01:48:14,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2023-11-29 01:48:14,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:48:14,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-29 01:48:14,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:48:16,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:48:18,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504147174] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:18,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:48:18,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 122 [2023-11-29 01:48:18,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480533434] [2023-11-29 01:48:18,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:18,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2023-11-29 01:48:18,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2023-11-29 01:48:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=11397, Unknown=0, NotChecked=0, Total=14762 [2023-11-29 01:48:18,228 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 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 01:48:19,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:19,406 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2023-11-29 01:48:19,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-29 01:48:19,407 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 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 159 [2023-11-29 01:48:19,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:19,408 INFO L225 Difference]: With dead ends: 288 [2023-11-29 01:48:19,408 INFO L226 Difference]: Without dead ends: 167 [2023-11-29 01:48:19,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 200 SyntacticMatches, 77 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11993 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5822, Invalid=19938, Unknown=0, NotChecked=0, Total=25760 [2023-11-29 01:48:19,409 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 419 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:19,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 433 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:48:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-29 01:48:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2023-11-29 01:48:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 0 states have call successors, (0), 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 01:48:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2023-11-29 01:48:19,524 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 159 [2023-11-29 01:48:19,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:19,524 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2023-11-29 01:48:19,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 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 01:48:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2023-11-29 01:48:19,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-29 01:48:19,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:19,525 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:19,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-11-29 01:48:19,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:19,726 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:19,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:19,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1445235965, now seen corresponding path program 73 times [2023-11-29 01:48:19,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:19,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158232715] [2023-11-29 01:48:19,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:19,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 2965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:48:23,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:23,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158232715] [2023-11-29 01:48:23,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158232715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:23,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119163015] [2023-11-29 01:48:23,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:48:23,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:23,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:23,786 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:23,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-11-29 01:48:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:24,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 168 conjunts are in the unsatisfiable core [2023-11-29 01:48:24,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:26,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:48:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 2965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:48:31,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:31,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:48:31,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:48:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 2965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:48:31,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119163015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:31,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:48:31,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 163 [2023-11-29 01:48:31,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184693409] [2023-11-29 01:48:31,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:31,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2023-11-29 01:48:31,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:31,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2023-11-29 01:48:31,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=25922, Unknown=0, NotChecked=0, Total=26406 [2023-11-29 01:48:31,656 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 163 states, 163 states have (on average 1.9754601226993864) internal successors, (322), 163 states have internal predecessors, (322), 0 states have call successors, (0), 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 01:48:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:38,575 INFO L93 Difference]: Finished difference Result 167 states and 168 transitions. [2023-11-29 01:48:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-11-29 01:48:38,575 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.9754601226993864) internal successors, (322), 163 states have internal predecessors, (322), 0 states have call successors, (0), 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 160 [2023-11-29 01:48:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:38,576 INFO L225 Difference]: With dead ends: 167 [2023-11-29 01:48:38,576 INFO L226 Difference]: Without dead ends: 165 [2023-11-29 01:48:38,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7143 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=803, Invalid=40203, Unknown=0, NotChecked=0, Total=41006 [2023-11-29 01:48:38,577 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 4873 mSDsCounter, 0 mSdLazyCounter, 14933 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4916 SdHoareTripleChecker+Invalid, 14973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 14933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:38,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4916 Invalid, 14973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 14933 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-29 01:48:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-29 01:48:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2023-11-29 01:48:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 0 states have call successors, (0), 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 01:48:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2023-11-29 01:48:38,696 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 160 [2023-11-29 01:48:38,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:38,696 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2023-11-29 01:48:38,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.9754601226993864) internal successors, (322), 163 states have internal predecessors, (322), 0 states have call successors, (0), 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 01:48:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2023-11-29 01:48:38,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-29 01:48:38,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:38,697 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:38,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-11-29 01:48:38,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:38,897 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:38,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:38,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2017715616, now seen corresponding path program 74 times [2023-11-29 01:48:38,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:38,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103445110] [2023-11-29 01:48:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:38,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2186 proven. 895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:48:41,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:41,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103445110] [2023-11-29 01:48:41,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103445110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:41,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704833305] [2023-11-29 01:48:41,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:48:41,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:41,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:41,689 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:41,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-11-29 01:48:42,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:48:42,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:48:42,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-29 01:48:42,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:48:44,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:48:46,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704833305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:46,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:48:46,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 125 [2023-11-29 01:48:46,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312303288] [2023-11-29 01:48:46,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:46,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2023-11-29 01:48:46,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:46,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2023-11-29 01:48:46,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3531, Invalid=11969, Unknown=0, NotChecked=0, Total=15500 [2023-11-29 01:48:46,162 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 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 01:48:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:47,538 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2023-11-29 01:48:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-29 01:48:47,538 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 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 163 [2023-11-29 01:48:47,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:47,539 INFO L225 Difference]: With dead ends: 295 [2023-11-29 01:48:47,539 INFO L226 Difference]: Without dead ends: 171 [2023-11-29 01:48:47,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 205 SyntacticMatches, 79 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12601 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=6111, Invalid=20949, Unknown=0, NotChecked=0, Total=27060 [2023-11-29 01:48:47,541 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 475 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:47,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 410 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:48:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-29 01:48:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2023-11-29 01:48:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 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 01:48:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2023-11-29 01:48:47,651 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 163 [2023-11-29 01:48:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:47,651 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2023-11-29 01:48:47,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 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 01:48:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2023-11-29 01:48:47,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-29 01:48:47,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:47,652 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:47,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-11-29 01:48:47,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-11-29 01:48:47,853 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:47,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:47,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1951025210, now seen corresponding path program 75 times [2023-11-29 01:48:47,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:47,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249231418] [2023-11-29 01:48:47,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:47,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 0 proven. 3121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:48:52,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:52,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249231418] [2023-11-29 01:48:52,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249231418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:52,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963576654] [2023-11-29 01:48:52,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:48:52,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:52,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:52,168 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:52,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b37dc6b-249e-46d8-ac2c-713c30212885/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-11-29 01:49:56,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2023-11-29 01:49:56,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:49:56,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 175 conjunts are in the unsatisfiable core [2023-11-29 01:49:56,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:59,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:50:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 2262 proven. 859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:50:04,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:50:14,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-29 01:50:14,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-11-29 01:50:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 2223 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:50:20,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963576654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:50:20,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:50:20,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 85, 85] total 249 [2023-11-29 01:50:20,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168790230] [2023-11-29 01:50:20,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:50:20,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 249 states [2023-11-29 01:50:20,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:20,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 249 interpolants. [2023-11-29 01:50:20,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4724, Invalid=57028, Unknown=0, NotChecked=0, Total=61752 [2023-11-29 01:50:20,810 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 249 states, 249 states have (on average 1.9558232931726907) internal successors, (487), 249 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)