./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:08:36,897 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:08:37,019 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:08:37,028 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:08:37,029 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:08:37,070 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:08:37,070 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:08:37,071 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:08:37,073 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:08:37,078 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:08:37,079 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:08:37,080 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:08:37,080 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:08:37,082 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:08:37,083 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:08:37,083 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:08:37,084 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:08:37,084 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:08:37,084 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:08:37,085 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:08:37,085 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:08:37,086 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:08:37,086 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:08:37,087 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:08:37,089 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:08:37,090 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:08:37,090 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:08:37,090 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:08:37,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:37,091 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:08:37,093 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:08:37,093 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:08:37,093 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:08:37,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:08:37,094 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:08:37,094 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:08:37,094 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:08:37,095 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:08:37,095 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:08:37,095 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_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2023-11-06 23:08:37,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:08:37,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:08:37,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:08:37,401 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:08:37,402 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:08:37,404 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2023-11-06 23:08:40,464 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:08:40,694 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:08:40,694 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2023-11-06 23:08:40,700 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/data/dc4376889/402fb07e125442d5b0e64b57b9932948/FLAGacc1384d3 [2023-11-06 23:08:40,713 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/data/dc4376889/402fb07e125442d5b0e64b57b9932948 [2023-11-06 23:08:40,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:08:40,717 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:08:40,718 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:08:40,719 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:08:40,727 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:08:40,728 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:08:40" (1/1) ... [2023-11-06 23:08:40,729 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db2a109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:40, skipping insertion in model container [2023-11-06 23:08:40,729 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:08:40" (1/1) ... [2023-11-06 23:08:40,747 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:08:40,874 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_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2023-11-06 23:08:40,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:08:40,899 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:08:40,912 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_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2023-11-06 23:08:40,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:08:40,933 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:08:40,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:40 WrapperNode [2023-11-06 23:08:40,934 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:08:40,935 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:08:40,935 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:08:40,935 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:08:40,943 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:40" (1/1) ... [2023-11-06 23:08:40,950 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:40" (1/1) ... [2023-11-06 23:08:40,977 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2023-11-06 23:08:40,978 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:08:40,978 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:08:40,979 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:08:40,979 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:08:40,987 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:40" (1/1) ... [2023-11-06 23:08:40,987 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:40" (1/1) ... [2023-11-06 23:08:40,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:40" (1/1) ... [2023-11-06 23:08:40,989 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:40" (1/1) ... [2023-11-06 23:08:40,994 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:40" (1/1) ... [2023-11-06 23:08:40,997 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:40" (1/1) ... [2023-11-06 23:08:40,998 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:40" (1/1) ... [2023-11-06 23:08:40,999 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:40" (1/1) ... [2023-11-06 23:08:41,001 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:08:41,002 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:08:41,002 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:08:41,002 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:08:41,003 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:40" (1/1) ... [2023-11-06 23:08:41,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:41,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:41,042 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:08:41,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:08:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:08:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 23:08:41,081 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 23:08:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:08:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:08:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:08:41,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:08:41,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:08:41,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:08:41,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:08:41,143 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:08:41,144 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:08:41,299 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:08:41,305 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:08:41,306 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 23:08:41,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:08:41 BoogieIcfgContainer [2023-11-06 23:08:41,308 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:08:41,311 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:08:41,311 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:08:41,315 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:08:41,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:08:40" (1/3) ... [2023-11-06 23:08:41,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21837f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:08:41, skipping insertion in model container [2023-11-06 23:08:41,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:40" (2/3) ... [2023-11-06 23:08:41,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21837f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:08:41, skipping insertion in model container [2023-11-06 23:08:41,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:08:41" (3/3) ... [2023-11-06 23:08:41,318 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2023-11-06 23:08:41,339 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:08:41,339 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:08:41,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:08:41,395 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=LoopsAndPotentialCycles, 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;@37357414, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:08:41,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:08:41,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:08:41,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 23:08:41,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:41,408 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:41,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:41,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:41,413 INFO L85 PathProgramCache]: Analyzing trace with hash -687560493, now seen corresponding path program 1 times [2023-11-06 23:08:41,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:41,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255128331] [2023-11-06 23:08:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:41,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:41,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:08:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:41,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:08:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:41,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:41,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255128331] [2023-11-06 23:08:41,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255128331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:41,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:41,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:08:41,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365411004] [2023-11-06 23:08:41,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:41,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:08:41,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:08:41,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:08:41,741 INFO L87 Difference]: Start difference. First operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 23:08:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:41,768 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2023-11-06 23:08:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:08:41,771 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-06 23:08:41,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:41,778 INFO L225 Difference]: With dead ends: 47 [2023-11-06 23:08:41,778 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 23:08:41,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:08:41,787 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:41,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:08:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 23:08:41,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-06 23:08:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:08:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-11-06 23:08:41,854 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 19 [2023-11-06 23:08:41,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:41,855 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-11-06 23:08:41,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 23:08:41,857 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-11-06 23:08:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 23:08:41,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:41,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:41,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:08:41,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:41,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:41,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1294753969, now seen corresponding path program 1 times [2023-11-06 23:08:41,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:41,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640435389] [2023-11-06 23:08:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:41,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:42,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:08:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:42,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:08:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:42,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:42,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640435389] [2023-11-06 23:08:42,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640435389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:42,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:42,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:08:42,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422184461] [2023-11-06 23:08:42,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:42,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:42,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:42,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:42,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:42,209 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:08:42,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:42,288 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-11-06 23:08:42,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:08:42,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-11-06 23:08:42,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:42,291 INFO L225 Difference]: With dead ends: 39 [2023-11-06 23:08:42,292 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 23:08:42,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:42,294 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:42,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 49 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:08:42,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 23:08:42,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2023-11-06 23:08:42,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:08:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-11-06 23:08:42,312 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2023-11-06 23:08:42,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:42,313 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-11-06 23:08:42,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:08:42,313 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-11-06 23:08:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 23:08:42,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:42,316 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:42,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:08:42,316 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:42,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:42,318 INFO L85 PathProgramCache]: Analyzing trace with hash -554531054, now seen corresponding path program 1 times [2023-11-06 23:08:42,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:42,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038994793] [2023-11-06 23:08:42,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:42,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:42,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:08:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:42,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:08:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:42,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:08:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:42,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:42,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038994793] [2023-11-06 23:08:42,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038994793] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:42,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604932445] [2023-11-06 23:08:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:42,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:42,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:42,993 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:43,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:08:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:43,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 23:08:43,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:43,330 INFO L351 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 15 treesize of output 1 [2023-11-06 23:08:43,443 INFO L351 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 22 treesize of output 10 [2023-11-06 23:08:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:43,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:43,512 INFO L351 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 19 treesize of output 17 [2023-11-06 23:08:43,515 INFO L351 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 23 treesize of output 19 [2023-11-06 23:08:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:43,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604932445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:43,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:43,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2023-11-06 23:08:43,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272840116] [2023-11-06 23:08:43,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:43,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:08:43,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:43,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:08:43,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:08:43,701 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-06 23:08:44,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:44,110 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-11-06 23:08:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:08:44,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 27 [2023-11-06 23:08:44,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:44,113 INFO L225 Difference]: With dead ends: 47 [2023-11-06 23:08:44,113 INFO L226 Difference]: Without dead ends: 45 [2023-11-06 23:08:44,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2023-11-06 23:08:44,119 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:44,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 161 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:08:44,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-06 23:08:44,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2023-11-06 23:08:44,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 23:08:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-11-06 23:08:44,140 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 27 [2023-11-06 23:08:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:44,141 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-11-06 23:08:44,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-06 23:08:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-11-06 23:08:44,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 23:08:44,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:44,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:44,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:44,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:44,363 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:44,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:44,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1909003512, now seen corresponding path program 1 times [2023-11-06 23:08:44,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:44,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788773895] [2023-11-06 23:08:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:44,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:44,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:08:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:44,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:08:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:44,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:08:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 23:08:44,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:44,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788773895] [2023-11-06 23:08:44,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788773895] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:44,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515390159] [2023-11-06 23:08:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:44,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:44,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:44,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:44,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:08:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:44,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:08:44,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 23:08:44,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 23:08:44,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515390159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:44,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:44,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-06 23:08:44,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971182690] [2023-11-06 23:08:44,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:44,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:08:44,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:44,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:08:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:08:44,650 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 23:08:44,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:44,739 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2023-11-06 23:08:44,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:08:44,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2023-11-06 23:08:44,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:44,741 INFO L225 Difference]: With dead ends: 53 [2023-11-06 23:08:44,741 INFO L226 Difference]: Without dead ends: 41 [2023-11-06 23:08:44,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:08:44,743 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:44,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 119 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:08:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-06 23:08:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2023-11-06 23:08:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 23:08:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-06 23:08:44,750 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 31 [2023-11-06 23:08:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:44,750 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-06 23:08:44,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 23:08:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-06 23:08:44,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 23:08:44,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:44,752 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:44,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:44,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:44,958 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:44,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:44,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1118110763, now seen corresponding path program 2 times [2023-11-06 23:08:44,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:44,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059936963] [2023-11-06 23:08:44,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:44,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:45,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:08:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:45,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:08:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:45,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:08:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:45,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:08:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 23:08:45,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:45,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059936963] [2023-11-06 23:08:45,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059936963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:45,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331824519] [2023-11-06 23:08:45,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:45,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:45,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:45,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:45,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:08:45,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:45,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:45,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 23:08:45,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:45,841 INFO L351 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 15 treesize of output 1 [2023-11-06 23:08:46,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-06 23:08:46,336 INFO L351 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 22 treesize of output 10 [2023-11-06 23:08:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 23:08:46,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:50,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331824519] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:50,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:08:50,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 25 [2023-11-06 23:08:50,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449873196] [2023-11-06 23:08:50,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:50,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:08:50,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:50,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:08:50,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=665, Unknown=2, NotChecked=0, Total=812 [2023-11-06 23:08:50,611 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 25 states, 24 states have (on average 1.5) internal successors, (36), 20 states have internal predecessors, (36), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-06 23:08:56,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:08:59,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:08:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:59,166 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2023-11-06 23:08:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 23:08:59,167 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.5) internal successors, (36), 20 states have internal predecessors, (36), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 35 [2023-11-06 23:08:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:59,168 INFO L225 Difference]: With dead ends: 76 [2023-11-06 23:08:59,168 INFO L226 Difference]: Without dead ends: 74 [2023-11-06 23:08:59,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=475, Invalid=1874, Unknown=3, NotChecked=0, Total=2352 [2023-11-06 23:08:59,171 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 283 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 47 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:59,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 155 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 257 Invalid, 4 Unknown, 0 Unchecked, 5.9s Time] [2023-11-06 23:08:59,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-06 23:08:59,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 41. [2023-11-06 23:08:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 23:08:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-11-06 23:08:59,184 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 35 [2023-11-06 23:08:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:59,185 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-11-06 23:08:59,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.5) internal successors, (36), 20 states have internal predecessors, (36), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-06 23:08:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-11-06 23:08:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 23:08:59,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:59,187 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:59,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 23:08:59,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:59,393 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:59,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1711359563, now seen corresponding path program 2 times [2023-11-06 23:08:59,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:59,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774976071] [2023-11-06 23:08:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:59,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:59,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:08:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:59,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:08:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:59,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:08:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:59,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:08:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 23:08:59,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:59,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774976071] [2023-11-06 23:08:59,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774976071] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:59,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427730466] [2023-11-06 23:08:59,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:59,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:59,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:59,907 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:59,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:08:59,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:59,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:59,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 23:09:00,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:00,259 INFO L351 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 23 treesize of output 1 [2023-11-06 23:09:00,658 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:09:00,659 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 17 [2023-11-06 23:09:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:09:00,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:01,024 INFO L351 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 23 treesize of output 21 [2023-11-06 23:09:01,037 INFO L351 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 29 treesize of output 23 [2023-11-06 23:09:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 23:09:01,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427730466] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:01,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:01,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 34 [2023-11-06 23:09:01,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557426294] [2023-11-06 23:09:01,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:01,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 23:09:01,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:01,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 23:09:01,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 23:09:01,481 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 28 states have internal predecessors, (57), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2023-11-06 23:09:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:03,058 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2023-11-06 23:09:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 23:09:03,059 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 28 states have internal predecessors, (57), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 39 [2023-11-06 23:09:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:03,061 INFO L225 Difference]: With dead ends: 61 [2023-11-06 23:09:03,061 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 23:09:03,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=550, Invalid=2530, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 23:09:03,064 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 120 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:03,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 233 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:09:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 23:09:03,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2023-11-06 23:09:03,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 23:09:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2023-11-06 23:09:03,081 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 39 [2023-11-06 23:09:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:03,082 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2023-11-06 23:09:03,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 28 states have internal predecessors, (57), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2023-11-06 23:09:03,083 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2023-11-06 23:09:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-06 23:09:03,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:03,093 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:03,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:03,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:03,294 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:03,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:03,295 INFO L85 PathProgramCache]: Analyzing trace with hash -181817714, now seen corresponding path program 3 times [2023-11-06 23:09:03,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:03,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258361144] [2023-11-06 23:09:03,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:03,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:03,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:09:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:03,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:09:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:03,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:09:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:03,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:09:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:03,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:09:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 23:09:03,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:03,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258361144] [2023-11-06 23:09:03,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258361144] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:03,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998818168] [2023-11-06 23:09:03,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:09:03,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:03,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:03,853 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:03,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:09:03,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-06 23:09:03,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:03,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:09:03,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:04,196 INFO L351 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 19 treesize of output 1 [2023-11-06 23:09:04,465 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 38 treesize of output 16 [2023-11-06 23:09:04,668 INFO L351 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 28 treesize of output 10 [2023-11-06 23:09:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 23:09:04,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:16,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998818168] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:16,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:09:16,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2023-11-06 23:09:16,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729645535] [2023-11-06 23:09:16,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:16,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 23:09:16,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:16,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 23:09:16,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=731, Unknown=6, NotChecked=0, Total=870 [2023-11-06 23:09:16,906 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 24 states have internal predecessors, (49), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-06 23:09:18,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:09:21,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:09:27,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:09:29,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:09:29,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:29,827 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2023-11-06 23:09:29,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 23:09:29,827 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 24 states have internal predecessors, (49), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 47 [2023-11-06 23:09:29,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:29,829 INFO L225 Difference]: With dead ends: 96 [2023-11-06 23:09:29,829 INFO L226 Difference]: Without dead ends: 94 [2023-11-06 23:09:29,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=511, Invalid=2561, Unknown=8, NotChecked=0, Total=3080 [2023-11-06 23:09:29,832 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 163 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 45 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:29,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 235 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 462 Invalid, 4 Unknown, 0 Unchecked, 8.3s Time] [2023-11-06 23:09:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-06 23:09:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 57. [2023-11-06 23:09:29,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 23:09:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2023-11-06 23:09:29,847 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 47 [2023-11-06 23:09:29,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:29,847 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2023-11-06 23:09:29,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 24 states have internal predecessors, (49), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-06 23:09:29,848 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2023-11-06 23:09:29,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 23:09:29,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:29,849 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:29,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 23:09:30,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:30,057 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:30,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:30,058 INFO L85 PathProgramCache]: Analyzing trace with hash -581569404, now seen corresponding path program 4 times [2023-11-06 23:09:30,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:30,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071166148] [2023-11-06 23:09:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:30,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:30,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:09:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:30,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:09:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:30,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:09:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:30,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:09:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:30,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:09:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 23:09:30,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:30,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071166148] [2023-11-06 23:09:30,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071166148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:30,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463229855] [2023-11-06 23:09:30,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:09:30,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:30,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:30,682 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:30,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:09:30,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:09:30,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:30,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:09:30,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:30,942 INFO L351 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 15 treesize of output 1 [2023-11-06 23:09:31,159 INFO L351 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 22 treesize of output 10 [2023-11-06 23:09:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 23:09:31,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:31,314 INFO L351 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 19 treesize of output 17 [2023-11-06 23:09:31,316 INFO L351 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 23 treesize of output 19 [2023-11-06 23:09:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 23:09:31,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463229855] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:31,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:31,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 31 [2023-11-06 23:09:31,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35831309] [2023-11-06 23:09:31,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:31,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 23:09:31,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:31,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 23:09:31,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2023-11-06 23:09:31,566 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 31 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 26 states have internal predecessors, (70), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2023-11-06 23:09:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:32,309 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2023-11-06 23:09:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 23:09:32,310 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 26 states have internal predecessors, (70), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 51 [2023-11-06 23:09:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:32,311 INFO L225 Difference]: With dead ends: 86 [2023-11-06 23:09:32,311 INFO L226 Difference]: Without dead ends: 84 [2023-11-06 23:09:32,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=1678, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 23:09:32,313 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 102 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:32,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 308 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:09:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-06 23:09:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2023-11-06 23:09:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 23:09:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2023-11-06 23:09:32,328 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 51 [2023-11-06 23:09:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:32,329 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2023-11-06 23:09:32,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 26 states have internal predecessors, (70), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2023-11-06 23:09:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2023-11-06 23:09:32,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-06 23:09:32,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:32,330 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:32,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:32,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 23:09:32,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:32,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:32,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1453174918, now seen corresponding path program 5 times [2023-11-06 23:09:32,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:32,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421937044] [2023-11-06 23:09:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:32,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:32,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:09:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:32,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:09:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:32,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:09:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:32,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:09:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:32,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:09:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-06 23:09:32,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:32,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421937044] [2023-11-06 23:09:32,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421937044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:32,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608921137] [2023-11-06 23:09:32,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:09:32,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:32,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:32,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:32,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:09:32,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-06 23:09:32,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:32,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:32,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-06 23:09:32,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-06 23:09:33,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608921137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:33,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:33,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-06 23:09:33,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002979387] [2023-11-06 23:09:33,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:33,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:09:33,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:33,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:09:33,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:09:33,080 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:09:33,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:33,219 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2023-11-06 23:09:33,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:09:33,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 55 [2023-11-06 23:09:33,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:33,221 INFO L225 Difference]: With dead ends: 91 [2023-11-06 23:09:33,221 INFO L226 Difference]: Without dead ends: 71 [2023-11-06 23:09:33,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 107 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:09:33,222 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:33,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 109 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:33,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-06 23:09:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2023-11-06 23:09:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 23:09:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2023-11-06 23:09:33,239 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 55 [2023-11-06 23:09:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:33,240 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2023-11-06 23:09:33,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:09:33,240 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2023-11-06 23:09:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 23:09:33,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:33,241 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:33,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 23:09:33,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 23:09:33,447 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:33,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:33,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1754460089, now seen corresponding path program 6 times [2023-11-06 23:09:33,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:33,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916073834] [2023-11-06 23:09:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:34,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:09:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:34,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:09:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:34,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:09:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:34,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:09:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:34,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:09:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:34,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:09:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:09:34,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:34,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916073834] [2023-11-06 23:09:34,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916073834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:34,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675014375] [2023-11-06 23:09:34,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:09:34,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:34,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:34,198 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:34,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:09:34,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-06 23:09:34,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:34,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 23:09:34,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:34,507 INFO L351 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 19 treesize of output 1 [2023-11-06 23:09:34,790 INFO L322 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-06 23:09:34,790 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 16 [2023-11-06 23:09:34,994 INFO L351 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 28 treesize of output 10 [2023-11-06 23:09:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 57 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 23:09:35,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:47,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675014375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:47,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:09:47,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2023-11-06 23:09:47,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107923136] [2023-11-06 23:09:47,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:47,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:09:47,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:09:47,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1181, Unknown=6, NotChecked=0, Total=1332 [2023-11-06 23:09:47,291 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 32 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 28 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-06 23:09:49,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:09:51,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:09:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:52,696 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2023-11-06 23:09:52,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 23:09:52,696 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 28 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) Word has length 59 [2023-11-06 23:09:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:52,697 INFO L225 Difference]: With dead ends: 75 [2023-11-06 23:09:52,697 INFO L226 Difference]: Without dead ends: 73 [2023-11-06 23:09:52,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=458, Invalid=2958, Unknown=6, NotChecked=0, Total=3422 [2023-11-06 23:09:52,700 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 118 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:52,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 232 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 546 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2023-11-06 23:09:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-06 23:09:52,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2023-11-06 23:09:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 23:09:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2023-11-06 23:09:52,726 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 59 [2023-11-06 23:09:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:52,728 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2023-11-06 23:09:52,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 28 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-06 23:09:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2023-11-06 23:09:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 23:09:52,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:52,731 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:52,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:52,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:52,937 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:52,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:52,938 INFO L85 PathProgramCache]: Analyzing trace with hash 120574397, now seen corresponding path program 7 times [2023-11-06 23:09:52,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:52,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626446377] [2023-11-06 23:09:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:52,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:53,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:09:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:53,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:09:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:53,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:09:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:53,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:09:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:53,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:09:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:53,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:09:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:09:53,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:53,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626446377] [2023-11-06 23:09:53,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626446377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:53,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942987910] [2023-11-06 23:09:53,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:09:53,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:53,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:53,547 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:53,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:09:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:53,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 23:09:53,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:54,019 INFO L351 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 15 treesize of output 1 [2023-11-06 23:09:54,330 INFO L351 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 22 treesize of output 10 [2023-11-06 23:09:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:09:54,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:54,471 INFO L351 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 19 treesize of output 17 [2023-11-06 23:09:54,473 INFO L351 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 23 treesize of output 19 [2023-11-06 23:09:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:09:54,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942987910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:54,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:54,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 32 [2023-11-06 23:09:54,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626564568] [2023-11-06 23:09:54,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:54,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:09:54,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:54,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:09:54,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:09:54,635 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 28 states have internal predecessors, (78), 10 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-06 23:09:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:55,488 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2023-11-06 23:09:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 23:09:55,489 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 28 states have internal predecessors, (78), 10 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 63 [2023-11-06 23:09:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:55,490 INFO L225 Difference]: With dead ends: 99 [2023-11-06 23:09:55,490 INFO L226 Difference]: Without dead ends: 97 [2023-11-06 23:09:55,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=317, Invalid=2035, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 23:09:55,492 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 146 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:55,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 363 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:09:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-06 23:09:55,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2023-11-06 23:09:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 57 states have internal predecessors, (59), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 23:09:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2023-11-06 23:09:55,509 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 63 [2023-11-06 23:09:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:55,509 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2023-11-06 23:09:55,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 28 states have internal predecessors, (78), 10 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-06 23:09:55,510 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2023-11-06 23:09:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-06 23:09:55,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:55,511 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:55,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 23:09:55,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:09:55,717 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:55,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:55,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1814620211, now seen corresponding path program 8 times [2023-11-06 23:09:55,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:55,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660340705] [2023-11-06 23:09:55,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:55,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:55,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:09:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:55,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:09:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:55,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:09:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:55,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:09:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:55,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:09:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:55,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:09:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-06 23:09:55,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:55,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660340705] [2023-11-06 23:09:55,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660340705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:55,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904007056] [2023-11-06 23:09:55,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:09:55,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:55,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:55,975 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:55,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:09:56,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:09:56,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:56,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:09:56,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-06 23:09:56,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-06 23:09:56,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904007056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:56,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:56,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-06 23:09:56,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115771755] [2023-11-06 23:09:56,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:56,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:09:56,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:56,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:09:56,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:09:56,379 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-06 23:09:56,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:56,546 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2023-11-06 23:09:56,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:09:56,547 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 67 [2023-11-06 23:09:56,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:56,548 INFO L225 Difference]: With dead ends: 105 [2023-11-06 23:09:56,548 INFO L226 Difference]: Without dead ends: 81 [2023-11-06 23:09:56,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:09:56,549 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:56,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 148 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:56,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-06 23:09:56,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2023-11-06 23:09:56,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 23:09:56,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-11-06 23:09:56,570 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 67 [2023-11-06 23:09:56,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:56,570 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-11-06 23:09:56,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-06 23:09:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-11-06 23:09:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-06 23:09:56,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:56,572 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:56,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:56,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:09:56,778 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:56,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:56,778 INFO L85 PathProgramCache]: Analyzing trace with hash -700161792, now seen corresponding path program 9 times [2023-11-06 23:09:56,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:56,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499333741] [2023-11-06 23:09:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:56,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:57,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:09:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:57,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:09:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:57,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:09:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:57,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:09:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:57,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:09:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:57,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:09:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:57,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:09:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-06 23:09:57,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:57,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499333741] [2023-11-06 23:09:57,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499333741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:57,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727545289] [2023-11-06 23:09:57,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:09:57,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:57,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:57,582 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:57,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:09:57,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-06 23:09:57,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:57,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 23:09:57,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:58,047 INFO L351 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 19 treesize of output 1 [2023-11-06 23:09:58,336 INFO L322 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-06 23:09:58,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 16 [2023-11-06 23:09:58,623 INFO L351 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 28 treesize of output 10 [2023-11-06 23:09:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 33 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:09:58,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:00,800 WARN L839 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (< 5 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) (+ |c_ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16)))) is different from false [2023-11-06 23:10:00,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727545289] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:00,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:00,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2023-11-06 23:10:00,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972593043] [2023-11-06 23:10:00,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:00,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 23:10:00,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:00,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 23:10:00,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1048, Unknown=1, NotChecked=66, Total=1260 [2023-11-06 23:10:00,816 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 30 states have internal predecessors, (77), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-06 23:10:03,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:10:05,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:10:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:05,754 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2023-11-06 23:10:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 23:10:05,754 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 30 states have internal predecessors, (77), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 71 [2023-11-06 23:10:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:05,755 INFO L225 Difference]: With dead ends: 79 [2023-11-06 23:10:05,755 INFO L226 Difference]: Without dead ends: 77 [2023-11-06 23:10:05,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=385, Invalid=2374, Unknown=1, NotChecked=102, Total=2862 [2023-11-06 23:10:05,757 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 22 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:05,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 288 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 615 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-11-06 23:10:05,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-06 23:10:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2023-11-06 23:10:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 23:10:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2023-11-06 23:10:05,774 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 71 [2023-11-06 23:10:05,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:05,775 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2023-11-06 23:10:05,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 30 states have internal predecessors, (77), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-06 23:10:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2023-11-06 23:10:05,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-06 23:10:05,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:05,777 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:05,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:05,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:10:05,989 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:05,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:05,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1947082230, now seen corresponding path program 10 times [2023-11-06 23:10:05,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:05,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627992193] [2023-11-06 23:10:05,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:05,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:06,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:06,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:10:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:06,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:10:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:06,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:10:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:06,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:10:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:06,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:10:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:06,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:10:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-06 23:10:06,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:06,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627992193] [2023-11-06 23:10:06,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627992193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:06,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067548089] [2023-11-06 23:10:06,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:10:06,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:06,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:06,629 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:06,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:10:06,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:10:06,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:06,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:10:06,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:07,164 INFO L351 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 15 treesize of output 1 [2023-11-06 23:10:07,542 INFO L351 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 22 treesize of output 10 [2023-11-06 23:10:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 21 proven. 92 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-06 23:10:07,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:07,706 INFO L351 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 19 treesize of output 17 [2023-11-06 23:10:07,716 INFO L351 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 23 treesize of output 19 [2023-11-06 23:10:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-06 23:10:07,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067548089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:07,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:07,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 36 [2023-11-06 23:10:07,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056140507] [2023-11-06 23:10:07,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:07,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 23:10:07,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:07,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 23:10:07,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 23:10:07,903 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 36 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 32 states have internal predecessors, (92), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-06 23:10:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:08,906 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2023-11-06 23:10:08,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 23:10:08,907 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 32 states have internal predecessors, (92), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 75 [2023-11-06 23:10:08,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:08,908 INFO L225 Difference]: With dead ends: 111 [2023-11-06 23:10:08,908 INFO L226 Difference]: Without dead ends: 109 [2023-11-06 23:10:08,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=372, Invalid=2708, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 23:10:08,911 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 176 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:08,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 404 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:10:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-06 23:10:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 77. [2023-11-06 23:10:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 23:10:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2023-11-06 23:10:08,930 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 75 [2023-11-06 23:10:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:08,931 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2023-11-06 23:10:08,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 32 states have internal predecessors, (92), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-06 23:10:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2023-11-06 23:10:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-06 23:10:08,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:08,933 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:08,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-06 23:10:09,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:10:09,139 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:09,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:09,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1814327276, now seen corresponding path program 11 times [2023-11-06 23:10:09,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:09,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11478878] [2023-11-06 23:10:09,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:09,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:09,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:09,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:10:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:09,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:10:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:09,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:10:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:09,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:10:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:09,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:10:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:09,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:10:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-06 23:10:09,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:09,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11478878] [2023-11-06 23:10:09,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11478878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:09,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048467813] [2023-11-06 23:10:09,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:10:09,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:09,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:09,407 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:09,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:10:09,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-06 23:10:09,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:09,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:10:09,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-06 23:10:09,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-06 23:10:09,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048467813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:09,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:09,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-06 23:10:09,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006677534] [2023-11-06 23:10:09,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:09,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 23:10:09,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:09,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 23:10:09,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-06 23:10:09,950 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-06 23:10:10,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:10,148 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2023-11-06 23:10:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:10:10,148 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 79 [2023-11-06 23:10:10,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:10,149 INFO L225 Difference]: With dead ends: 117 [2023-11-06 23:10:10,149 INFO L226 Difference]: Without dead ends: 89 [2023-11-06 23:10:10,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 153 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-11-06 23:10:10,151 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 63 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:10,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 140 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:10:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-06 23:10:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2023-11-06 23:10:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 23:10:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2023-11-06 23:10:10,165 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 79 [2023-11-06 23:10:10,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:10,165 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2023-11-06 23:10:10,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-06 23:10:10,165 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2023-11-06 23:10:10,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-06 23:10:10,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:10,167 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:10,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:10,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:10:10,368 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:10,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:10,368 INFO L85 PathProgramCache]: Analyzing trace with hash -502341447, now seen corresponding path program 12 times [2023-11-06 23:10:10,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:10,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252964725] [2023-11-06 23:10:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:10,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:11,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:11,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:10:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:11,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:10:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:11,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:10:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:11,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:10:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:11,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:10:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:11,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:10:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:11,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:10:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-06 23:10:11,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:11,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252964725] [2023-11-06 23:10:11,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252964725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:11,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368001731] [2023-11-06 23:10:11,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:10:11,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:11,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:11,337 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:11,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:10:11,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-06 23:10:11,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:11,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 23:10:11,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:11,970 INFO L351 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 15 treesize of output 1 [2023-11-06 23:10:12,266 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-06 23:10:12,646 INFO L351 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 22 treesize of output 10 [2023-11-06 23:10:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 31 proven. 131 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-06 23:10:12,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:20,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368001731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:20,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:20,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2023-11-06 23:10:20,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672298460] [2023-11-06 23:10:20,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:20,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-06 23:10:20,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:20,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-06 23:10:20,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1454, Unknown=4, NotChecked=0, Total=1640 [2023-11-06 23:10:20,946 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 39 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 35 states have internal predecessors, (92), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2023-11-06 23:10:23,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:10:25,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:10:27,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:10:30,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:10:32,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:10:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:32,632 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2023-11-06 23:10:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-06 23:10:32,633 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 35 states have internal predecessors, (92), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) Word has length 83 [2023-11-06 23:10:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:32,634 INFO L225 Difference]: With dead ends: 134 [2023-11-06 23:10:32,634 INFO L226 Difference]: Without dead ends: 132 [2023-11-06 23:10:32,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 98 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=755, Invalid=4791, Unknown=4, NotChecked=0, Total=5550 [2023-11-06 23:10:32,637 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 258 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 72 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:32,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 490 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 984 Invalid, 5 Unknown, 0 Unchecked, 10.7s Time] [2023-11-06 23:10:32,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-06 23:10:32,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 76. [2023-11-06 23:10:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 23:10:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2023-11-06 23:10:32,656 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 83 [2023-11-06 23:10:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:32,656 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2023-11-06 23:10:32,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 35 states have internal predecessors, (92), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2023-11-06 23:10:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2023-11-06 23:10:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-06 23:10:32,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:32,658 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:32,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-06 23:10:32,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:10:32,864 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:32,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:32,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1833952977, now seen corresponding path program 13 times [2023-11-06 23:10:32,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:32,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331319438] [2023-11-06 23:10:32,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:32,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:33,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:33,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:10:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:33,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:10:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:33,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:10:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:33,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:10:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:33,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:10:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:33,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:10:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:33,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:10:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-06 23:10:33,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:33,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331319438] [2023-11-06 23:10:33,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331319438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:33,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518647398] [2023-11-06 23:10:33,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:10:33,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:33,757 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:33,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:10:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:33,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 23:10:33,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:34,500 INFO L351 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 15 treesize of output 1 [2023-11-06 23:10:35,037 INFO L351 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 22 treesize of output 10 [2023-11-06 23:10:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-06 23:10:35,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:35,277 INFO L351 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 19 treesize of output 17 [2023-11-06 23:10:35,279 INFO L351 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 23 treesize of output 19 [2023-11-06 23:10:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-06 23:10:35,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518647398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:35,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:35,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 48 [2023-11-06 23:10:35,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198107278] [2023-11-06 23:10:35,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:35,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-06 23:10:35,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:35,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-06 23:10:35,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2050, Unknown=0, NotChecked=0, Total=2256 [2023-11-06 23:10:35,805 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 48 states, 47 states have (on average 2.617021276595745) internal successors, (123), 42 states have internal predecessors, (123), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) [2023-11-06 23:10:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:37,749 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2023-11-06 23:10:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 23:10:37,750 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.617021276595745) internal successors, (123), 42 states have internal predecessors, (123), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) Word has length 87 [2023-11-06 23:10:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:37,752 INFO L225 Difference]: With dead ends: 123 [2023-11-06 23:10:37,752 INFO L226 Difference]: Without dead ends: 121 [2023-11-06 23:10:37,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 157 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=525, Invalid=4445, Unknown=0, NotChecked=0, Total=4970 [2023-11-06 23:10:37,755 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 242 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:37,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 686 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 23:10:37,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-06 23:10:37,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 85. [2023-11-06 23:10:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 23:10:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2023-11-06 23:10:37,781 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 87 [2023-11-06 23:10:37,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:37,782 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2023-11-06 23:10:37,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.617021276595745) internal successors, (123), 42 states have internal predecessors, (123), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) [2023-11-06 23:10:37,782 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2023-11-06 23:10:37,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-06 23:10:37,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:37,784 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:37,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:37,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:10:37,991 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:37,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:37,991 INFO L85 PathProgramCache]: Analyzing trace with hash 645146277, now seen corresponding path program 14 times [2023-11-06 23:10:37,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:37,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961929714] [2023-11-06 23:10:37,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:37,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:38,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:38,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:10:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:38,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:10:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:38,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:10:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:38,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:10:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:38,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:10:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:38,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:10:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:38,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:10:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-06 23:10:38,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:38,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961929714] [2023-11-06 23:10:38,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961929714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:38,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627052519] [2023-11-06 23:10:38,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:10:38,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:38,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:38,367 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:38,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:10:38,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:10:38,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:38,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:10:38,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-06 23:10:38,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-06 23:10:38,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627052519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:38,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:38,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-06 23:10:38,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355847242] [2023-11-06 23:10:38,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:38,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:10:38,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:38,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:10:38,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:10:38,991 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-06 23:10:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:39,227 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2023-11-06 23:10:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:10:39,227 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 91 [2023-11-06 23:10:39,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:39,228 INFO L225 Difference]: With dead ends: 129 [2023-11-06 23:10:39,228 INFO L226 Difference]: Without dead ends: 97 [2023-11-06 23:10:39,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 176 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 23:10:39,230 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 96 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:39,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 186 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:10:39,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-06 23:10:39,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2023-11-06 23:10:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 23:10:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2023-11-06 23:10:39,249 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 91 [2023-11-06 23:10:39,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:39,250 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2023-11-06 23:10:39,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-06 23:10:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2023-11-06 23:10:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-06 23:10:39,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:39,251 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:39,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:39,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 23:10:39,457 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:39,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:39,458 INFO L85 PathProgramCache]: Analyzing trace with hash -110375054, now seen corresponding path program 15 times [2023-11-06 23:10:39,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:39,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104113592] [2023-11-06 23:10:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:39,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:40,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:40,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:10:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:40,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:10:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:40,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:10:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:40,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:10:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:40,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:10:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:40,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:10:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:40,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:10:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:40,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-06 23:10:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 21 proven. 162 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-06 23:10:40,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:40,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104113592] [2023-11-06 23:10:40,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104113592] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:40,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224904722] [2023-11-06 23:10:40,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:10:40,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:40,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:40,423 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:40,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:10:40,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-06 23:10:40,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:40,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:10:40,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:41,045 INFO L351 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 19 treesize of output 1 [2023-11-06 23:10:41,342 INFO L322 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-06 23:10:41,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 16 [2023-11-06 23:10:41,827 INFO L351 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 28 treesize of output 10 [2023-11-06 23:10:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 47 proven. 162 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-06 23:10:41,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:54,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224904722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:54,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:54,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2023-11-06 23:10:54,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041420173] [2023-11-06 23:10:54,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:54,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-06 23:10:54,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:54,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-06 23:10:54,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1780, Unknown=4, NotChecked=0, Total=1980 [2023-11-06 23:10:54,319 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 43 states, 42 states have (on average 2.5) internal successors, (105), 39 states have internal predecessors, (105), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2023-11-06 23:10:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:55,893 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2023-11-06 23:10:55,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 23:10:55,894 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.5) internal successors, (105), 39 states have internal predecessors, (105), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) Word has length 95 [2023-11-06 23:10:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:55,895 INFO L225 Difference]: With dead ends: 102 [2023-11-06 23:10:55,895 INFO L226 Difference]: Without dead ends: 100 [2023-11-06 23:10:55,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 114 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=523, Invalid=3895, Unknown=4, NotChecked=0, Total=4422 [2023-11-06 23:10:55,897 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 125 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:55,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 509 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 23:10:55,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-06 23:10:55,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2023-11-06 23:10:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 23:10:55,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2023-11-06 23:10:55,921 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 95 [2023-11-06 23:10:55,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:55,922 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2023-11-06 23:10:55,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.5) internal successors, (105), 39 states have internal predecessors, (105), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2023-11-06 23:10:55,922 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2023-11-06 23:10:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-06 23:10:55,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:55,924 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:55,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:56,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:56,130 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:56,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:56,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1072364696, now seen corresponding path program 16 times [2023-11-06 23:10:56,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:56,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40061686] [2023-11-06 23:10:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:56,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:10:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:10:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:10:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:10:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:10:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:10:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:10:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-06 23:10:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-06 23:10:57,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:57,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40061686] [2023-11-06 23:10:57,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40061686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:57,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197807738] [2023-11-06 23:10:57,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:10:57,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:57,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:57,212 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:57,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:10:57,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:10:57,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:57,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-06 23:10:57,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:58,136 INFO L351 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 15 treesize of output 1 [2023-11-06 23:10:58,759 INFO L351 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 22 treesize of output 10 [2023-11-06 23:10:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-06 23:10:58,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:59,063 INFO L351 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 19 treesize of output 17 [2023-11-06 23:10:59,067 INFO L351 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 23 treesize of output 19 [2023-11-06 23:10:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-06 23:10:59,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197807738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:59,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:59,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 53 [2023-11-06 23:10:59,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401285572] [2023-11-06 23:10:59,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:59,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-06 23:10:59,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:59,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-06 23:10:59,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2526, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 23:10:59,686 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 53 states, 52 states have (on average 2.6923076923076925) internal successors, (140), 47 states have internal predecessors, (140), 23 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) [2023-11-06 23:11:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:01,848 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2023-11-06 23:11:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 23:11:01,848 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.6923076923076925) internal successors, (140), 47 states have internal predecessors, (140), 23 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) Word has length 99 [2023-11-06 23:11:01,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:01,851 INFO L225 Difference]: With dead ends: 143 [2023-11-06 23:11:01,852 INFO L226 Difference]: Without dead ends: 141 [2023-11-06 23:11:01,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 179 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=593, Invalid=5569, Unknown=0, NotChecked=0, Total=6162 [2023-11-06 23:11:01,855 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 187 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:01,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 737 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 23:11:01,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-06 23:11:01,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 101. [2023-11-06 23:11:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 23:11:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2023-11-06 23:11:01,893 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 99 [2023-11-06 23:11:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:01,893 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2023-11-06 23:11:01,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.6923076923076925) internal successors, (140), 47 states have internal predecessors, (140), 23 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) [2023-11-06 23:11:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2023-11-06 23:11:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-06 23:11:01,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:01,895 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:01,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-06 23:11:02,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:02,095 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:02,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:02,096 INFO L85 PathProgramCache]: Analyzing trace with hash -428389282, now seen corresponding path program 17 times [2023-11-06 23:11:02,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:02,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513988207] [2023-11-06 23:11:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:02,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:02,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:11:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:02,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:11:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:02,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:11:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:02,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:11:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:02,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:11:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:02,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:11:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:02,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:11:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:02,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:11:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:02,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-06 23:11:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-06 23:11:02,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:02,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513988207] [2023-11-06 23:11:02,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513988207] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:02,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138930552] [2023-11-06 23:11:02,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:11:02,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:02,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:02,597 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:02,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 23:11:02,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-06 23:11:02,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:02,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:11:02,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-06 23:11:03,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-06 23:11:03,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138930552] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:03,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:03,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-06 23:11:03,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698662815] [2023-11-06 23:11:03,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:03,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 23:11:03,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:03,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 23:11:03,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-06 23:11:03,521 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-06 23:11:03,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:03,821 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2023-11-06 23:11:03,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 23:11:03,822 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 103 [2023-11-06 23:11:03,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:03,823 INFO L225 Difference]: With dead ends: 149 [2023-11-06 23:11:03,823 INFO L226 Difference]: Without dead ends: 113 [2023-11-06 23:11:03,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 199 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 23:11:03,825 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 115 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:03,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 176 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:11:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-06 23:11:03,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 96. [2023-11-06 23:11:03,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 23:11:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2023-11-06 23:11:03,849 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 103 [2023-11-06 23:11:03,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:03,849 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2023-11-06 23:11:03,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-06 23:11:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2023-11-06 23:11:03,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-06 23:11:03,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:03,851 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:03,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:04,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:04,053 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:04,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:04,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2033872171, now seen corresponding path program 18 times [2023-11-06 23:11:04,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:04,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144741722] [2023-11-06 23:11:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:04,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:05,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:11:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:05,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:11:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:05,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:11:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:05,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:11:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:05,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:11:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:05,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:11:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:05,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:11:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:05,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:11:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:05,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-06 23:11:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:05,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 23:11:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-06 23:11:05,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:05,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144741722] [2023-11-06 23:11:05,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144741722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:05,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120516591] [2023-11-06 23:11:05,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:11:05,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:05,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:05,181 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:05,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 23:11:05,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-06 23:11:05,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:05,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-06 23:11:05,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:05,804 INFO L351 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 19 treesize of output 1 [2023-11-06 23:11:06,101 INFO L322 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-06 23:11:06,102 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 16 [2023-11-06 23:11:06,526 INFO L351 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 28 treesize of output 10 [2023-11-06 23:11:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 51 proven. 231 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-06 23:11:06,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:16,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120516591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:16,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:11:16,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 38 [2023-11-06 23:11:16,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937185454] [2023-11-06 23:11:16,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:16,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-06 23:11:16,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:16,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-06 23:11:16,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1399, Unknown=5, NotChecked=0, Total=1560 [2023-11-06 23:11:16,900 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 38 states, 38 states have (on average 2.6052631578947367) internal successors, (99), 35 states have internal predecessors, (99), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-06 23:11:19,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:19,341 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2023-11-06 23:11:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 23:11:19,342 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6052631578947367) internal successors, (99), 35 states have internal predecessors, (99), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) Word has length 107 [2023-11-06 23:11:19,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:19,343 INFO L225 Difference]: With dead ends: 114 [2023-11-06 23:11:19,343 INFO L226 Difference]: Without dead ends: 112 [2023-11-06 23:11:19,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 137 SyntacticMatches, 8 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=481, Invalid=3546, Unknown=5, NotChecked=0, Total=4032 [2023-11-06 23:11:19,345 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 113 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:19,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 544 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1261 Invalid, 1 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 23:11:19,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-06 23:11:19,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2023-11-06 23:11:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 23:11:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2023-11-06 23:11:19,369 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 107 [2023-11-06 23:11:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:19,370 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2023-11-06 23:11:19,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6052631578947367) internal successors, (99), 35 states have internal predecessors, (99), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-06 23:11:19,370 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2023-11-06 23:11:19,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-06 23:11:19,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:19,371 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:19,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:19,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:19,571 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:19,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:19,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1467751585, now seen corresponding path program 19 times [2023-11-06 23:11:19,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:19,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074631794] [2023-11-06 23:11:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:19,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:20,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:11:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:20,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:11:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:20,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:11:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:20,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:11:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:20,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:11:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:20,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:11:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:20,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:11:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:20,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:11:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:20,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-06 23:11:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:20,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 23:11:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-06 23:11:20,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:20,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074631794] [2023-11-06 23:11:20,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074631794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:20,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303471270] [2023-11-06 23:11:20,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:11:20,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:20,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:20,710 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:20,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 23:11:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:20,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-06 23:11:20,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:21,678 INFO L351 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 15 treesize of output 1 [2023-11-06 23:11:22,356 INFO L351 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 22 treesize of output 10 [2023-11-06 23:11:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 254 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-06 23:11:22,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:22,672 INFO L351 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 19 treesize of output 17 [2023-11-06 23:11:22,682 INFO L351 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 23 treesize of output 19 [2023-11-06 23:11:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-06 23:11:22,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303471270] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:22,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:22,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 48 [2023-11-06 23:11:22,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051118432] [2023-11-06 23:11:22,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:22,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-06 23:11:22,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:22,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-06 23:11:22,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2072, Unknown=0, NotChecked=0, Total=2256 [2023-11-06 23:11:22,934 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 48 states, 47 states have (on average 2.851063829787234) internal successors, (134), 44 states have internal predecessors, (134), 18 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-06 23:11:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:25,299 INFO L93 Difference]: Finished difference Result 159 states and 165 transitions. [2023-11-06 23:11:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-06 23:11:25,299 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.851063829787234) internal successors, (134), 44 states have internal predecessors, (134), 18 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) Word has length 111 [2023-11-06 23:11:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:25,301 INFO L225 Difference]: With dead ends: 159 [2023-11-06 23:11:25,301 INFO L226 Difference]: Without dead ends: 157 [2023-11-06 23:11:25,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 210 SyntacticMatches, 9 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=537, Invalid=5315, Unknown=0, NotChecked=0, Total=5852 [2023-11-06 23:11:25,303 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 186 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:25,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 972 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 23:11:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-06 23:11:25,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2023-11-06 23:11:25,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-06 23:11:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2023-11-06 23:11:25,341 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 111 [2023-11-06 23:11:25,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:25,341 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2023-11-06 23:11:25,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.851063829787234) internal successors, (134), 44 states have internal predecessors, (134), 18 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-06 23:11:25,342 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2023-11-06 23:11:25,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-06 23:11:25,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:25,343 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:25,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:25,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:25,548 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:25,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:25,548 INFO L85 PathProgramCache]: Analyzing trace with hash -707976937, now seen corresponding path program 20 times [2023-11-06 23:11:25,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:25,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046823788] [2023-11-06 23:11:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:25,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:11:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:11:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:11:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:11:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:11:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:11:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:11:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:11:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-06 23:11:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 23:11:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-06 23:11:26,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:26,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046823788] [2023-11-06 23:11:26,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046823788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:26,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965642870] [2023-11-06 23:11:26,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:11:26,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:26,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:26,062 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:26,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 23:11:26,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:11:26,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:26,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 23:11:26,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-06 23:11:26,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-06 23:11:27,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965642870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:27,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:27,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-06 23:11:27,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890690178] [2023-11-06 23:11:27,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:27,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:11:27,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:27,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:11:27,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:11:27,031 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-06 23:11:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:27,374 INFO L93 Difference]: Finished difference Result 165 states and 171 transitions. [2023-11-06 23:11:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 23:11:27,375 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 115 [2023-11-06 23:11:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:27,376 INFO L225 Difference]: With dead ends: 165 [2023-11-06 23:11:27,376 INFO L226 Difference]: Without dead ends: 125 [2023-11-06 23:11:27,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 222 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 23:11:27,378 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 105 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:27,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 212 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:11:27,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-06 23:11:27,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 108. [2023-11-06 23:11:27,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-06 23:11:27,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2023-11-06 23:11:27,403 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 115 [2023-11-06 23:11:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:27,404 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2023-11-06 23:11:27,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-06 23:11:27,404 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2023-11-06 23:11:27,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-06 23:11:27,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:27,406 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:27,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:27,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 23:11:27,612 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:27,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash -325453340, now seen corresponding path program 21 times [2023-11-06 23:11:27,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:27,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33125966] [2023-11-06 23:11:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:27,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:11:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:11:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:11:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:11:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:11:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:11:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:11:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:11:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-06 23:11:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 23:11:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-06 23:11:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-11-06 23:11:28,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:28,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33125966] [2023-11-06 23:11:28,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33125966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:28,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534298839] [2023-11-06 23:11:28,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:11:28,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:28,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:28,829 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:28,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 23:11:29,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-06 23:11:29,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:29,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 23:11:29,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:30,214 INFO L351 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 15 treesize of output 1 [2023-11-06 23:11:30,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:11:30,596 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2023-11-06 23:11:31,425 INFO L351 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 22 treesize of output 10 [2023-11-06 23:11:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 61 proven. 278 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-06 23:11:31,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:43,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534298839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:43,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:11:43,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 51 [2023-11-06 23:11:43,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136948435] [2023-11-06 23:11:43,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:43,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-06 23:11:43,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:43,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-06 23:11:43,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2501, Unknown=4, NotChecked=0, Total=2756 [2023-11-06 23:11:43,940 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 51 states, 50 states have (on average 2.68) internal successors, (134), 47 states have internal predecessors, (134), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2023-11-06 23:11:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:46,075 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2023-11-06 23:11:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 23:11:46,075 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.68) internal successors, (134), 47 states have internal predecessors, (134), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) Word has length 119 [2023-11-06 23:11:46,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:46,077 INFO L225 Difference]: With dead ends: 126 [2023-11-06 23:11:46,077 INFO L226 Difference]: Without dead ends: 124 [2023-11-06 23:11:46,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=634, Invalid=5214, Unknown=4, NotChecked=0, Total=5852 [2023-11-06 23:11:46,079 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 154 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:46,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 803 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1929 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 23:11:46,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-06 23:11:46,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2023-11-06 23:11:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-06 23:11:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2023-11-06 23:11:46,124 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 119 [2023-11-06 23:11:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:46,125 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2023-11-06 23:11:46,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.68) internal successors, (134), 47 states have internal predecessors, (134), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2023-11-06 23:11:46,125 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2023-11-06 23:11:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-06 23:11:46,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:46,126 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:46,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:46,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:46,334 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:46,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:46,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1033591590, now seen corresponding path program 22 times [2023-11-06 23:11:46,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:46,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965424359] [2023-11-06 23:11:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:46,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:47,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:11:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:47,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:11:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:47,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:11:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:47,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:11:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:47,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:11:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:47,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:11:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:47,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:11:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:47,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:11:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:47,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-06 23:11:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:47,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 23:11:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:47,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-06 23:11:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 30 proven. 305 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-11-06 23:11:47,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:47,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965424359] [2023-11-06 23:11:47,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965424359] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:47,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556729444] [2023-11-06 23:11:47,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:11:47,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:47,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:47,577 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:47,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 23:11:47,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:11:47,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:47,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-06 23:11:47,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:48,690 INFO L351 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 15 treesize of output 1 [2023-11-06 23:11:49,614 INFO L351 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 22 treesize of output 10 [2023-11-06 23:11:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 33 proven. 320 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-06 23:11:49,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:49,999 INFO L351 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 19 treesize of output 17 [2023-11-06 23:11:50,002 INFO L351 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 23 treesize of output 19 [2023-11-06 23:11:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 30 proven. 305 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-11-06 23:11:50,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556729444] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:50,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:50,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 26] total 52 [2023-11-06 23:11:50,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497344] [2023-11-06 23:11:50,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:50,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-06 23:11:50,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:50,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-06 23:11:50,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2451, Unknown=0, NotChecked=0, Total=2652 [2023-11-06 23:11:50,299 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 52 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 48 states have internal predecessors, (148), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2023-11-06 23:11:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:52,910 INFO L93 Difference]: Finished difference Result 175 states and 181 transitions. [2023-11-06 23:11:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-06 23:11:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 48 states have internal predecessors, (148), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) Word has length 123 [2023-11-06 23:11:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:52,912 INFO L225 Difference]: With dead ends: 175 [2023-11-06 23:11:52,912 INFO L226 Difference]: Without dead ends: 173 [2023-11-06 23:11:52,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 233 SyntacticMatches, 10 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=592, Invalid=6380, Unknown=0, NotChecked=0, Total=6972 [2023-11-06 23:11:52,914 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 167 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 2195 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 2241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:52,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1107 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2195 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 23:11:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-06 23:11:52,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 125. [2023-11-06 23:11:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:11:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2023-11-06 23:11:52,953 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 123 [2023-11-06 23:11:52,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:52,954 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2023-11-06 23:11:52,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 48 states have internal predecessors, (148), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2023-11-06 23:11:52,954 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2023-11-06 23:11:52,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-06 23:11:52,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:52,955 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:52,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:53,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:53,163 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:53,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:53,163 INFO L85 PathProgramCache]: Analyzing trace with hash 206890192, now seen corresponding path program 23 times [2023-11-06 23:11:53,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:53,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507329930] [2023-11-06 23:11:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:53,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:53,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:11:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:53,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:11:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:53,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:11:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:53,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:11:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:53,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:11:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:53,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:11:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:53,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:11:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:53,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:11:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:53,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-06 23:11:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:53,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 23:11:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:53,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-06 23:11:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 129 proven. 186 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-06 23:11:53,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:53,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507329930] [2023-11-06 23:11:53,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507329930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:53,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388039602] [2023-11-06 23:11:53,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:11:53,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:53,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:53,730 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:53,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 23:11:53,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-06 23:11:53,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:53,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 23:11:53,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-06 23:11:54,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-06 23:11:54,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388039602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:54,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:54,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-06 23:11:54,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661028126] [2023-11-06 23:11:54,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:54,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 23:11:54,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:54,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 23:11:54,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 23:11:54,919 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 35 states have internal predecessors, (122), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-06 23:11:55,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:55,322 INFO L93 Difference]: Finished difference Result 181 states and 187 transitions. [2023-11-06 23:11:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:11:55,322 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 35 states have internal predecessors, (122), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 127 [2023-11-06 23:11:55,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:55,324 INFO L225 Difference]: With dead ends: 181 [2023-11-06 23:11:55,324 INFO L226 Difference]: Without dead ends: 137 [2023-11-06 23:11:55,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 245 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 23:11:55,325 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 183 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:55,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 229 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:11:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-06 23:11:55,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 120. [2023-11-06 23:11:55,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:11:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2023-11-06 23:11:55,374 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 127 [2023-11-06 23:11:55,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:55,375 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2023-11-06 23:11:55,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 35 states have internal predecessors, (122), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-06 23:11:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2023-11-06 23:11:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-06 23:11:55,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:55,377 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:55,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-06 23:11:55,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:55,584 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:55,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:55,585 INFO L85 PathProgramCache]: Analyzing trace with hash 485078429, now seen corresponding path program 24 times [2023-11-06 23:11:55,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:55,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902426048] [2023-11-06 23:11:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:55,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:56,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:11:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:56,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:11:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:56,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:11:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:56,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:11:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:56,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:11:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:56,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:11:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:56,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:11:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:56,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:11:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:56,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-06 23:11:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:56,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 23:11:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:56,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-06 23:11:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:56,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-06 23:11:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 30 proven. 348 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-06 23:11:56,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:56,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902426048] [2023-11-06 23:11:56,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902426048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:56,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591805131] [2023-11-06 23:11:56,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:11:56,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:56,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:56,993 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:56,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 23:11:57,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-11-06 23:11:57,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:57,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-06 23:11:57,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:58,081 INFO L351 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 19 treesize of output 1 [2023-11-06 23:11:58,471 INFO L322 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-06 23:11:58,471 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 16 [2023-11-06 23:11:59,303 INFO L351 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 28 treesize of output 10 [2023-11-06 23:11:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 59 proven. 375 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-06 23:11:59,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:04,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591805131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:04,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:12:04,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 55 [2023-11-06 23:12:04,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732164466] [2023-11-06 23:12:04,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:04,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-06 23:12:04,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:04,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-06 23:12:04,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2937, Unknown=2, NotChecked=0, Total=3192 [2023-11-06 23:12:04,881 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 55 states, 54 states have (on average 2.7222222222222223) internal successors, (147), 51 states have internal predecessors, (147), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (24), 23 states have call predecessors, (24), 21 states have call successors, (24) [2023-11-06 23:12:07,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:07,606 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2023-11-06 23:12:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-06 23:12:07,606 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.7222222222222223) internal successors, (147), 51 states have internal predecessors, (147), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (24), 23 states have call predecessors, (24), 21 states have call successors, (24) Word has length 131 [2023-11-06 23:12:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:07,607 INFO L225 Difference]: With dead ends: 138 [2023-11-06 23:12:07,608 INFO L226 Difference]: Without dead ends: 136 [2023-11-06 23:12:07,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 159 SyntacticMatches, 10 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=694, Invalid=6444, Unknown=2, NotChecked=0, Total=7140 [2023-11-06 23:12:07,610 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 156 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:07,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 920 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2083 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 23:12:07,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-06 23:12:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2023-11-06 23:12:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:12:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2023-11-06 23:12:07,660 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 131 [2023-11-06 23:12:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:07,661 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2023-11-06 23:12:07,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.7222222222222223) internal successors, (147), 51 states have internal predecessors, (147), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (24), 23 states have call predecessors, (24), 21 states have call successors, (24) [2023-11-06 23:12:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2023-11-06 23:12:07,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-06 23:12:07,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:07,663 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:07,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:07,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:07,878 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:07,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:07,879 INFO L85 PathProgramCache]: Analyzing trace with hash -2003969005, now seen corresponding path program 25 times [2023-11-06 23:12:07,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:07,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778981113] [2023-11-06 23:12:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:07,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:12:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:12:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:12:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:12:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:12:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:12:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:12:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:12:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-06 23:12:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 23:12:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-06 23:12:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-06 23:12:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 33 proven. 379 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-06 23:12:09,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:09,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778981113] [2023-11-06 23:12:09,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778981113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:09,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728715458] [2023-11-06 23:12:09,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:12:09,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:09,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:09,185 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:09,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 23:12:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-06 23:12:09,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:10,253 INFO L351 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 15 treesize of output 1 [2023-11-06 23:12:11,277 INFO L351 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 22 treesize of output 10 [2023-11-06 23:12:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 33 proven. 379 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-06 23:12:11,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:11,717 INFO L351 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 19 treesize of output 17 [2023-11-06 23:12:11,722 INFO L351 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 23 treesize of output 19 [2023-11-06 23:12:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 33 proven. 379 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-06 23:12:12,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728715458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:12,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:12,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 28] total 68 [2023-11-06 23:12:12,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573738876] [2023-11-06 23:12:12,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:12,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-11-06 23:12:12,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:12,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-11-06 23:12:12,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=4254, Unknown=0, NotChecked=0, Total=4556 [2023-11-06 23:12:12,673 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 68 states, 67 states have (on average 2.8507462686567164) internal successors, (191), 62 states have internal predecessors, (191), 32 states have call successors, (33), 1 states have call predecessors, (33), 2 states have return successors, (34), 34 states have call predecessors, (34), 32 states have call successors, (34) [2023-11-06 23:12:16,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:16,028 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2023-11-06 23:12:16,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-06 23:12:16,029 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.8507462686567164) internal successors, (191), 62 states have internal predecessors, (191), 32 states have call successors, (33), 1 states have call predecessors, (33), 2 states have return successors, (34), 34 states have call predecessors, (34), 32 states have call successors, (34) Word has length 135 [2023-11-06 23:12:16,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:16,031 INFO L225 Difference]: With dead ends: 191 [2023-11-06 23:12:16,031 INFO L226 Difference]: Without dead ends: 189 [2023-11-06 23:12:16,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 245 SyntacticMatches, 10 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=797, Invalid=9709, Unknown=0, NotChecked=0, Total=10506 [2023-11-06 23:12:16,033 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 323 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 2565 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 2629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:16,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1168 Invalid, 2629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2565 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 23:12:16,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-06 23:12:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 137. [2023-11-06 23:12:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 23:12:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2023-11-06 23:12:16,090 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 135 [2023-11-06 23:12:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:16,091 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2023-11-06 23:12:16,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.8507462686567164) internal successors, (191), 62 states have internal predecessors, (191), 32 states have call successors, (33), 1 states have call predecessors, (33), 2 states have return successors, (34), 34 states have call predecessors, (34), 32 states have call successors, (34) [2023-11-06 23:12:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2023-11-06 23:12:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-06 23:12:16,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:16,093 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:16,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-06 23:12:16,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:16,301 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:16,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:16,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1607608439, now seen corresponding path program 26 times [2023-11-06 23:12:16,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:16,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553314021] [2023-11-06 23:12:16,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:16,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:16,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:12:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:16,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:12:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:16,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:12:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:16,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:12:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:16,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:12:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:16,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:12:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:16,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:12:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:16,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:12:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:16,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-06 23:12:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:16,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 23:12:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:16,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-06 23:12:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:16,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-06 23:12:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 163 proven. 227 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-06 23:12:16,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:16,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553314021] [2023-11-06 23:12:16,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553314021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:16,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816089494] [2023-11-06 23:12:16,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:12:16,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:16,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:16,889 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:16,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 23:12:17,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:12:17,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:17,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 23:12:17,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-06 23:12:17,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-06 23:12:18,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816089494] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:18,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:18,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-11-06 23:12:18,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728950185] [2023-11-06 23:12:18,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:18,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-06 23:12:18,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:18,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-06 23:12:18,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 23:12:18,050 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-06 23:12:18,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:18,524 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2023-11-06 23:12:18,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 23:12:18,525 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 139 [2023-11-06 23:12:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:18,527 INFO L225 Difference]: With dead ends: 197 [2023-11-06 23:12:18,527 INFO L226 Difference]: Without dead ends: 149 [2023-11-06 23:12:18,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 268 SyntacticMatches, 21 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 23:12:18,531 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 108 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:18,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 313 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:12:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-06 23:12:18,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 132. [2023-11-06 23:12:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 23:12:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2023-11-06 23:12:18,593 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 139 [2023-11-06 23:12:18,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:18,594 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2023-11-06 23:12:18,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-06 23:12:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2023-11-06 23:12:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-06 23:12:18,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:18,596 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:18,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:18,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:18,803 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:18,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash 566812758, now seen corresponding path program 27 times [2023-11-06 23:12:18,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:18,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550111272] [2023-11-06 23:12:18,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:18,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:20,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:12:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:20,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 23:12:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:20,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:12:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:20,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:12:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:20,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:12:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:20,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:12:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:20,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:12:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:20,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:12:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:20,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-06 23:12:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:20,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 23:12:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:20,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-06 23:12:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:20,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-06 23:12:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:20,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-06 23:12:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 33 proven. 426 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-11-06 23:12:20,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:20,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550111272] [2023-11-06 23:12:20,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550111272] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:20,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480718969] [2023-11-06 23:12:20,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:12:20,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:20,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:20,720 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:20,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aa1746-ce6c-4147-8fce-f09ce2c3121f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 23:12:21,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-06 23:12:21,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:21,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-06 23:12:21,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:21,759 INFO L351 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 19 treesize of output 1 [2023-11-06 23:12:22,083 INFO L322 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-06 23:12:22,084 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 16 [2023-11-06 23:12:22,820 INFO L351 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 28 treesize of output 10 [2023-11-06 23:12:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 75 proven. 426 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-06 23:12:22,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:29,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480718969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:29,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:12:29,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 47 [2023-11-06 23:12:29,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482368548] [2023-11-06 23:12:29,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:29,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-06 23:12:29,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:29,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-06 23:12:29,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2157, Unknown=3, NotChecked=0, Total=2352 [2023-11-06 23:12:29,306 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 47 states, 47 states have (on average 2.8085106382978724) internal successors, (132), 44 states have internal predecessors, (132), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15)