./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i --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_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/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_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/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_3bdf17fa-00df-40b7-af2a-22b8e759c055/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 5208e97c947824349dcc8cb32160d4052cba683a795fae400d45ff0b27a23a25 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:54:13,034 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:54:13,181 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:54:13,200 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:54:13,202 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:54:13,247 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:54:13,248 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:54:13,248 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:54:13,250 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:54:13,256 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:54:13,258 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:54:13,258 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:54:13,259 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:54:13,261 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:54:13,262 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:54:13,263 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:54:13,263 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:54:13,264 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:54:13,264 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:54:13,265 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:54:13,266 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:54:13,266 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:54:13,267 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:54:13,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:54:13,270 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:54:13,271 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:54:13,272 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:54:13,272 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:54:13,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:54:13,274 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:54:13,275 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:54:13,276 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:54:13,276 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:54:13,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:54:13,277 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:54:13,277 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:54:13,278 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:54:13,278 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:54:13,279 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:54:13,279 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_3bdf17fa-00df-40b7-af2a-22b8e759c055/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5208e97c947824349dcc8cb32160d4052cba683a795fae400d45ff0b27a23a25 [2023-11-06 22:54:13,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:54:13,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:54:13,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:54:13,677 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:54:13,678 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:54:13,679 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i [2023-11-06 22:54:16,821 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:54:17,213 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:54:17,214 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i [2023-11-06 22:54:17,230 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/data/a754ace71/e14eec34ee664a9fb997da9af62849dc/FLAGfe8233d45 [2023-11-06 22:54:17,248 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/data/a754ace71/e14eec34ee664a9fb997da9af62849dc [2023-11-06 22:54:17,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:54:17,256 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:54:17,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:54:17,259 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:54:17,264 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:54:17,267 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:17" (1/1) ... [2023-11-06 22:54:17,268 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@787bf2a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:17, skipping insertion in model container [2023-11-06 22:54:17,268 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:17" (1/1) ... [2023-11-06 22:54:17,347 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:54:17,532 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_3bdf17fa-00df-40b7-af2a-22b8e759c055/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i[916,929] [2023-11-06 22:54:17,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:54:17,823 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:54:17,837 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_3bdf17fa-00df-40b7-af2a-22b8e759c055/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i[916,929] [2023-11-06 22:54:17,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:54:17,957 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:54:17,958 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:17 WrapperNode [2023-11-06 22:54:17,958 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:54:17,959 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:54:17,960 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:54:17,960 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:54:17,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:17" (1/1) ... [2023-11-06 22:54:17,989 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:17" (1/1) ... [2023-11-06 22:54:18,072 INFO L138 Inliner]: procedures = 26, calls = 74, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 484 [2023-11-06 22:54:18,073 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:54:18,074 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:54:18,074 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:54:18,074 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:54:18,084 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:17" (1/1) ... [2023-11-06 22:54:18,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:17" (1/1) ... [2023-11-06 22:54:18,093 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:17" (1/1) ... [2023-11-06 22:54:18,093 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:17" (1/1) ... [2023-11-06 22:54:18,126 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:17" (1/1) ... [2023-11-06 22:54:18,136 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:17" (1/1) ... [2023-11-06 22:54:18,156 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:17" (1/1) ... [2023-11-06 22:54:18,161 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:17" (1/1) ... [2023-11-06 22:54:18,168 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:54:18,169 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:54:18,170 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:54:18,170 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:54:18,171 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:17" (1/1) ... [2023-11-06 22:54:18,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:54:18,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:18,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:54:18,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:54:18,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:54:18,261 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:54:18,261 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:54:18,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:54:18,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:54:18,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:54:18,435 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:54:18,438 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:54:19,508 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:54:19,518 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:54:19,518 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:54:19,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:19 BoogieIcfgContainer [2023-11-06 22:54:19,525 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:54:19,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:54:19,530 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:54:19,534 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:54:19,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:17" (1/3) ... [2023-11-06 22:54:19,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499ccd6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:19, skipping insertion in model container [2023-11-06 22:54:19,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:17" (2/3) ... [2023-11-06 22:54:19,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499ccd6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:19, skipping insertion in model container [2023-11-06 22:54:19,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:19" (3/3) ... [2023-11-06 22:54:19,538 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-55.i [2023-11-06 22:54:19,559 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:54:19,560 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:54:19,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:54:19,644 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;@6e8576e9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:54:19,645 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:54:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 126 states have (on average 1.492063492063492) internal successors, (188), 127 states have internal predecessors, (188), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-06 22:54:19,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-11-06 22:54:19,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:19,709 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:19,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:54:19,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1424431598, now seen corresponding path program 1 times [2023-11-06 22:54:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:19,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968759787] [2023-11-06 22:54:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:19,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:20,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:20,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968759787] [2023-11-06 22:54:20,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:54:20,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428080450] [2023-11-06 22:54:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:20,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:20,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:20,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:20,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:54:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:20,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:54:20,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2023-11-06 22:54:20,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:54:20,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428080450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:54:20,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:54:20,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:54:20,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130256463] [2023-11-06 22:54:20,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:20,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:54:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:20,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:54:20,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:54:20,919 INFO L87 Difference]: Start difference. First operand has 190 states, 126 states have (on average 1.492063492063492) internal successors, (188), 127 states have internal predecessors, (188), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) Second operand has 2 states, 2 states have (on average 44.0) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) [2023-11-06 22:54:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:20,974 INFO L93 Difference]: Finished difference Result 372 states and 673 transitions. [2023-11-06 22:54:20,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:54:20,976 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 44.0) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) Word has length 388 [2023-11-06 22:54:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:20,987 INFO L225 Difference]: With dead ends: 372 [2023-11-06 22:54:20,988 INFO L226 Difference]: Without dead ends: 185 [2023-11-06 22:54:20,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 387 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 22:54:20,998 INFO L413 NwaCegarLoop]: 299 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, 299 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 22:54:20,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:54:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-06 22:54:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-11-06 22:54:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 122 states have (on average 1.4508196721311475) internal successors, (177), 122 states have internal predecessors, (177), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-06 22:54:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 299 transitions. [2023-11-06 22:54:21,098 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 299 transitions. Word has length 388 [2023-11-06 22:54:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:21,099 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 299 transitions. [2023-11-06 22:54:21,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 44.0) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) [2023-11-06 22:54:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 299 transitions. [2023-11-06 22:54:21,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-11-06 22:54:21,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:21,109 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:21,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:21,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:54:21,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:54:21,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:21,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1116369226, now seen corresponding path program 1 times [2023-11-06 22:54:21,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:21,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680196324] [2023-11-06 22:54:21,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:21,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:21,504 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:54:21,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333802242] [2023-11-06 22:54:21,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:21,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:21,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:21,512 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:21,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:54:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:21,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:54:21,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-06 22:54:22,763 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:54:22,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:22,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680196324] [2023-11-06 22:54:22,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:54:22,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333802242] [2023-11-06 22:54:22,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333802242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:54:22,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:54:22,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:54:22,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713467040] [2023-11-06 22:54:22,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:22,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:54:22,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:22,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:54:22,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:54:22,770 INFO L87 Difference]: Start difference. First operand 185 states and 299 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:54:23,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:23,131 INFO L93 Difference]: Finished difference Result 605 states and 981 transitions. [2023-11-06 22:54:23,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:54:23,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 388 [2023-11-06 22:54:23,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:23,141 INFO L225 Difference]: With dead ends: 605 [2023-11-06 22:54:23,142 INFO L226 Difference]: Without dead ends: 423 [2023-11-06 22:54:23,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:54:23,145 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 376 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:23,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 1285 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:54:23,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-11-06 22:54:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 365. [2023-11-06 22:54:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 240 states have (on average 1.4541666666666666) internal successors, (349), 240 states have internal predecessors, (349), 122 states have call successors, (122), 2 states have call predecessors, (122), 2 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2023-11-06 22:54:23,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 593 transitions. [2023-11-06 22:54:23,254 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 593 transitions. Word has length 388 [2023-11-06 22:54:23,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:23,257 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 593 transitions. [2023-11-06 22:54:23,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:54:23,257 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 593 transitions. [2023-11-06 22:54:23,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-11-06 22:54:23,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:23,266 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:23,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:23,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:23,474 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:54:23,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:23,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1495566846, now seen corresponding path program 1 times [2023-11-06 22:54:23,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:23,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412972453] [2023-11-06 22:54:23,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:23,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:23,561 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:54:23,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728428108] [2023-11-06 22:54:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:23,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:23,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:23,563 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:23,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:54:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:23,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:54:23,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-06 22:54:23,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:54:23,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:23,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412972453] [2023-11-06 22:54:23,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:54:23,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728428108] [2023-11-06 22:54:23,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728428108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:54:23,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:54:23,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:54:23,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293412110] [2023-11-06 22:54:23,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:23,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:54:23,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:23,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:54:23,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:54:23,994 INFO L87 Difference]: Start difference. First operand 365 states and 593 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:54:24,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:24,196 INFO L93 Difference]: Finished difference Result 1073 states and 1743 transitions. [2023-11-06 22:54:24,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:54:24,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 389 [2023-11-06 22:54:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:24,208 INFO L225 Difference]: With dead ends: 1073 [2023-11-06 22:54:24,208 INFO L226 Difference]: Without dead ends: 711 [2023-11-06 22:54:24,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:54:24,212 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 265 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:24,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 766 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:54:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2023-11-06 22:54:24,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 427. [2023-11-06 22:54:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 302 states have (on average 1.4403973509933774) internal successors, (435), 302 states have internal predecessors, (435), 122 states have call successors, (122), 2 states have call predecessors, (122), 2 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2023-11-06 22:54:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 679 transitions. [2023-11-06 22:54:24,302 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 679 transitions. Word has length 389 [2023-11-06 22:54:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:24,304 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 679 transitions. [2023-11-06 22:54:24,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:54:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 679 transitions. [2023-11-06 22:54:24,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-11-06 22:54:24,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:24,315 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:24,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:24,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:24,523 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:54:24,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:24,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1213201912, now seen corresponding path program 1 times [2023-11-06 22:54:24,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:24,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130277692] [2023-11-06 22:54:24,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:24,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:24,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:54:24,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102328144] [2023-11-06 22:54:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:24,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:24,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:24,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:24,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:54:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:25,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:54:25,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 858 proven. 9 refuted. 0 times theorem prover too weak. 6453 trivial. 0 not checked. [2023-11-06 22:54:25,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-06 22:54:25,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:25,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130277692] [2023-11-06 22:54:25,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:54:25,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102328144] [2023-11-06 22:54:25,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102328144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:25,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:54:25,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-06 22:54:25,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834469048] [2023-11-06 22:54:25,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:25,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:54:25,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:25,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:54:25,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:54:25,531 INFO L87 Difference]: Start difference. First operand 427 states and 679 transitions. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-06 22:54:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:26,957 INFO L93 Difference]: Finished difference Result 923 states and 1451 transitions. [2023-11-06 22:54:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:54:26,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) Word has length 389 [2023-11-06 22:54:26,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:26,967 INFO L225 Difference]: With dead ends: 923 [2023-11-06 22:54:26,967 INFO L226 Difference]: Without dead ends: 499 [2023-11-06 22:54:26,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 769 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:54:26,971 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 466 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:26,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 1020 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:54:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-11-06 22:54:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 473. [2023-11-06 22:54:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 283 states have (on average 1.2932862190812722) internal successors, (366), 284 states have internal predecessors, (366), 183 states have call successors, (183), 6 states have call predecessors, (183), 6 states have return successors, (183), 182 states have call predecessors, (183), 183 states have call successors, (183) [2023-11-06 22:54:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 732 transitions. [2023-11-06 22:54:27,105 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 732 transitions. Word has length 389 [2023-11-06 22:54:27,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:27,107 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 732 transitions. [2023-11-06 22:54:27,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-06 22:54:27,108 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 732 transitions. [2023-11-06 22:54:27,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2023-11-06 22:54:27,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:27,120 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:27,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:27,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:27,328 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:54:27,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:27,329 INFO L85 PathProgramCache]: Analyzing trace with hash 217297936, now seen corresponding path program 1 times [2023-11-06 22:54:27,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:27,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419566557] [2023-11-06 22:54:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:27,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:27,409 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:54:27,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252253381] [2023-11-06 22:54:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:27,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:27,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:27,411 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:27,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:54:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:27,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:54:27,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-06 22:54:27,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:54:27,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:27,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419566557] [2023-11-06 22:54:27,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:54:27,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252253381] [2023-11-06 22:54:27,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252253381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:54:27,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:54:27,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:54:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274868248] [2023-11-06 22:54:27,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:27,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:54:27,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:27,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:54:27,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:54:27,895 INFO L87 Difference]: Start difference. First operand 473 states and 732 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:54:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:28,295 INFO L93 Difference]: Finished difference Result 857 states and 1331 transitions. [2023-11-06 22:54:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:54:28,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 390 [2023-11-06 22:54:28,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:28,301 INFO L225 Difference]: With dead ends: 857 [2023-11-06 22:54:28,301 INFO L226 Difference]: Without dead ends: 493 [2023-11-06 22:54:28,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:54:28,304 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 316 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:28,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 761 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:54:28,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-11-06 22:54:28,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 473. [2023-11-06 22:54:28,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 283 states have (on average 1.2862190812720848) internal successors, (364), 284 states have internal predecessors, (364), 183 states have call successors, (183), 6 states have call predecessors, (183), 6 states have return successors, (183), 182 states have call predecessors, (183), 183 states have call successors, (183) [2023-11-06 22:54:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 730 transitions. [2023-11-06 22:54:28,430 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 730 transitions. Word has length 390 [2023-11-06 22:54:28,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:28,432 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 730 transitions. [2023-11-06 22:54:28,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:54:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 730 transitions. [2023-11-06 22:54:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2023-11-06 22:54:28,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:28,440 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:28,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:28,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:28,648 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:54:28,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:28,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1705930098, now seen corresponding path program 1 times [2023-11-06 22:54:28,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:28,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177115772] [2023-11-06 22:54:28,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:28,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:28,754 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:54:28,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525561789] [2023-11-06 22:54:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:28,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:28,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:28,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:28,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:54:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:29,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:54:29,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3018 proven. 129 refuted. 0 times theorem prover too weak. 4173 trivial. 0 not checked. [2023-11-06 22:54:29,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 51 proven. 129 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-06 22:54:30,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:30,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177115772] [2023-11-06 22:54:30,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:54:30,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525561789] [2023-11-06 22:54:30,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525561789] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:30,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:54:30,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:54:30,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415783898] [2023-11-06 22:54:30,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:30,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:54:30,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:30,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:54:30,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:54:30,252 INFO L87 Difference]: Start difference. First operand 473 states and 730 transitions. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-11-06 22:54:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:30,785 INFO L93 Difference]: Finished difference Result 855 states and 1307 transitions. [2023-11-06 22:54:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:54:30,787 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) Word has length 390 [2023-11-06 22:54:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:30,793 INFO L225 Difference]: With dead ends: 855 [2023-11-06 22:54:30,794 INFO L226 Difference]: Without dead ends: 491 [2023-11-06 22:54:30,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:54:30,797 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 319 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:30,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 507 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:54:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2023-11-06 22:54:30,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 485. [2023-11-06 22:54:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 292 states have (on average 1.2705479452054795) internal successors, (371), 293 states have internal predecessors, (371), 183 states have call successors, (183), 9 states have call predecessors, (183), 9 states have return successors, (183), 182 states have call predecessors, (183), 183 states have call successors, (183) [2023-11-06 22:54:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 737 transitions. [2023-11-06 22:54:30,888 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 737 transitions. Word has length 390 [2023-11-06 22:54:30,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:30,889 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 737 transitions. [2023-11-06 22:54:30,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-11-06 22:54:30,890 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 737 transitions. [2023-11-06 22:54:30,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2023-11-06 22:54:30,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:30,894 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:30,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:31,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:54:31,105 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:54:31,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:31,106 INFO L85 PathProgramCache]: Analyzing trace with hash -117582196, now seen corresponding path program 1 times [2023-11-06 22:54:31,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:31,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804311288] [2023-11-06 22:54:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:31,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:31,170 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:54:31,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411490737] [2023-11-06 22:54:31,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:31,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:31,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:31,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:31,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:54:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:31,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:54:31,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 2079 proven. 576 refuted. 0 times theorem prover too weak. 4665 trivial. 0 not checked. [2023-11-06 22:54:36,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 84 proven. 447 refuted. 0 times theorem prover too weak. 6789 trivial. 0 not checked. [2023-11-06 22:54:40,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:40,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804311288] [2023-11-06 22:54:40,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:54:40,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411490737] [2023-11-06 22:54:40,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411490737] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:40,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:54:40,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2023-11-06 22:54:40,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570369712] [2023-11-06 22:54:40,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:40,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 22:54:40,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:40,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 22:54:40,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:54:40,548 INFO L87 Difference]: Start difference. First operand 485 states and 737 transitions. Second operand has 36 states, 34 states have (on average 5.647058823529412) internal successors, (192), 32 states have internal predecessors, (192), 10 states have call successors, (122), 6 states have call predecessors, (122), 10 states have return successors, (122), 10 states have call predecessors, (122), 10 states have call successors, (122) [2023-11-06 22:54:52,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:52,541 INFO L93 Difference]: Finished difference Result 2164 states and 3187 transitions. [2023-11-06 22:54:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-11-06 22:54:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 5.647058823529412) internal successors, (192), 32 states have internal predecessors, (192), 10 states have call successors, (122), 6 states have call predecessors, (122), 10 states have return successors, (122), 10 states have call predecessors, (122), 10 states have call successors, (122) Word has length 390 [2023-11-06 22:54:52,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:52,559 INFO L225 Difference]: With dead ends: 2164 [2023-11-06 22:54:52,560 INFO L226 Difference]: Without dead ends: 1792 [2023-11-06 22:54:52,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 752 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4875 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=2488, Invalid=11318, Unknown=0, NotChecked=0, Total=13806 [2023-11-06 22:54:52,572 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 2271 mSDsluCounter, 3103 mSDsCounter, 0 mSdLazyCounter, 3460 mSolverCounterSat, 820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2302 SdHoareTripleChecker+Valid, 3328 SdHoareTripleChecker+Invalid, 4280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 820 IncrementalHoareTripleChecker+Valid, 3460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:52,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2302 Valid, 3328 Invalid, 4280 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [820 Valid, 3460 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-06 22:54:52,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2023-11-06 22:54:52,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 758. [2023-11-06 22:54:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 536 states have (on average 1.335820895522388) internal successors, (716), 538 states have internal predecessors, (716), 205 states have call successors, (205), 16 states have call predecessors, (205), 16 states have return successors, (205), 203 states have call predecessors, (205), 205 states have call successors, (205) [2023-11-06 22:54:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1126 transitions. [2023-11-06 22:54:52,858 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1126 transitions. Word has length 390 [2023-11-06 22:54:52,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:52,859 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 1126 transitions. [2023-11-06 22:54:52,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 5.647058823529412) internal successors, (192), 32 states have internal predecessors, (192), 10 states have call successors, (122), 6 states have call predecessors, (122), 10 states have return successors, (122), 10 states have call predecessors, (122), 10 states have call successors, (122) [2023-11-06 22:54:52,861 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1126 transitions. [2023-11-06 22:54:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2023-11-06 22:54:52,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:52,867 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:52,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:53,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:54:53,080 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:54:53,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:53,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1014975474, now seen corresponding path program 1 times [2023-11-06 22:54:53,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:53,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942214310] [2023-11-06 22:54:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:53,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:53,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:54:53,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585914963] [2023-11-06 22:54:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:53,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:53,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:53,196 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:53,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:54:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:53,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:54:53,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3412 proven. 405 refuted. 0 times theorem prover too weak. 3503 trivial. 0 not checked. [2023-11-06 22:54:57,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:01,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:01,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942214310] [2023-11-06 22:55:01,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:55:01,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585914963] [2023-11-06 22:55:01,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585914963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:01,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:55:01,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-06 22:55:01,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621424222] [2023-11-06 22:55:01,208 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:01,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:55:01,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:01,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:55:01,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:55:01,211 INFO L87 Difference]: Start difference. First operand 758 states and 1126 transitions. Second operand has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 13 states have internal predecessors, (106), 5 states have call successors, (61), 5 states have call predecessors, (61), 7 states have return successors, (61), 5 states have call predecessors, (61), 5 states have call successors, (61) [2023-11-06 22:55:04,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:04,719 INFO L93 Difference]: Finished difference Result 1822 states and 2634 transitions. [2023-11-06 22:55:04,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:55:04,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 13 states have internal predecessors, (106), 5 states have call successors, (61), 5 states have call predecessors, (61), 7 states have return successors, (61), 5 states have call predecessors, (61), 5 states have call successors, (61) Word has length 390 [2023-11-06 22:55:04,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:04,734 INFO L225 Difference]: With dead ends: 1822 [2023-11-06 22:55:04,734 INFO L226 Difference]: Without dead ends: 1521 [2023-11-06 22:55:04,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 692 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 22:55:04,738 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 446 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:04,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1020 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-06 22:55:04,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2023-11-06 22:55:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1176. [2023-11-06 22:55:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 935 states have (on average 1.3657754010695187) internal successors, (1277), 941 states have internal predecessors, (1277), 213 states have call successors, (213), 27 states have call predecessors, (213), 27 states have return successors, (213), 207 states have call predecessors, (213), 213 states have call successors, (213) [2023-11-06 22:55:05,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1703 transitions. [2023-11-06 22:55:05,022 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1703 transitions. Word has length 390 [2023-11-06 22:55:05,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:05,024 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 1703 transitions. [2023-11-06 22:55:05,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 13 states have internal predecessors, (106), 5 states have call successors, (61), 5 states have call predecessors, (61), 7 states have return successors, (61), 5 states have call predecessors, (61), 5 states have call successors, (61) [2023-11-06 22:55:05,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1703 transitions. [2023-11-06 22:55:05,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2023-11-06 22:55:05,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:05,031 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:05,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:05,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:05,232 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:55:05,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:05,233 INFO L85 PathProgramCache]: Analyzing trace with hash -620608688, now seen corresponding path program 1 times [2023-11-06 22:55:05,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:05,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050345228] [2023-11-06 22:55:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:05,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:05,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:55:05,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896804675] [2023-11-06 22:55:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:05,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:05,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:05,322 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:05,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:55:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:09,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:55:09,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 4543 proven. 492 refuted. 0 times theorem prover too weak. 2285 trivial. 0 not checked. [2023-11-06 22:55:24,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:30,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:30,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050345228] [2023-11-06 22:55:30,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:55:30,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896804675] [2023-11-06 22:55:30,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896804675] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:30,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:55:30,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-06 22:55:30,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736513371] [2023-11-06 22:55:30,502 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:30,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:55:30,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:55:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:55:30,505 INFO L87 Difference]: Start difference. First operand 1176 states and 1703 transitions. Second operand has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 17 states have internal predecessors, (112), 6 states have call successors, (61), 6 states have call predecessors, (61), 9 states have return successors, (61), 6 states have call predecessors, (61), 6 states have call successors, (61) [2023-11-06 22:55:35,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-06 22:55:53,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:53,414 INFO L93 Difference]: Finished difference Result 2088 states and 2984 transitions. [2023-11-06 22:55:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:55:53,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 17 states have internal predecessors, (112), 6 states have call successors, (61), 6 states have call predecessors, (61), 9 states have return successors, (61), 6 states have call predecessors, (61), 6 states have call successors, (61) Word has length 390 [2023-11-06 22:55:53,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:53,426 INFO L225 Difference]: With dead ends: 2088 [2023-11-06 22:55:53,427 INFO L226 Difference]: Without dead ends: 1700 [2023-11-06 22:55:53,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=375, Invalid=957, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:55:53,430 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 511 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:53,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 1178 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 16.9s Time] [2023-11-06 22:55:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2023-11-06 22:55:53,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1222. [2023-11-06 22:55:53,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 978 states have (on average 1.3588957055214723) internal successors, (1329), 984 states have internal predecessors, (1329), 213 states have call successors, (213), 30 states have call predecessors, (213), 30 states have return successors, (213), 207 states have call predecessors, (213), 213 states have call successors, (213) [2023-11-06 22:55:53,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1755 transitions. [2023-11-06 22:55:53,682 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1755 transitions. Word has length 390 [2023-11-06 22:55:53,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:53,683 INFO L495 AbstractCegarLoop]: Abstraction has 1222 states and 1755 transitions. [2023-11-06 22:55:53,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 17 states have internal predecessors, (112), 6 states have call successors, (61), 6 states have call predecessors, (61), 9 states have return successors, (61), 6 states have call predecessors, (61), 6 states have call successors, (61) [2023-11-06 22:55:53,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1755 transitions. [2023-11-06 22:55:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2023-11-06 22:55:53,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:53,690 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:53,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:53,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:53,912 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:55:53,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash -591328752, now seen corresponding path program 1 times [2023-11-06 22:55:53,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:53,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768964084] [2023-11-06 22:55:53,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:53,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:54,026 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:55:54,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621958775] [2023-11-06 22:55:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:54,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:54,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:54,061 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:54,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:55:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:54,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:55:54,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3452 proven. 282 refuted. 0 times theorem prover too weak. 3586 trivial. 0 not checked. [2023-11-06 22:56:10,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:23,547 WARN L293 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 105 DAG size of output: 54 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-11-06 22:57:04,965 WARN L293 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 177 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:57:41,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:41,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768964084] [2023-11-06 22:57:41,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:57:41,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621958775] [2023-11-06 22:57:41,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621958775] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:41,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:57:41,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-06 22:57:41,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952766116] [2023-11-06 22:57:41,325 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:41,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:57:41,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:57:41,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:57:41,328 INFO L87 Difference]: Start difference. First operand 1222 states and 1755 transitions. Second operand has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 13 states have internal predecessors, (103), 4 states have call successors, (61), 4 states have call predecessors, (61), 6 states have return successors, (61), 4 states have call predecessors, (61), 4 states have call successors, (61) [2023-11-06 22:57:57,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-06 22:58:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:11,507 INFO L93 Difference]: Finished difference Result 3568 states and 5053 transitions. [2023-11-06 22:58:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:58:11,508 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 13 states have internal predecessors, (103), 4 states have call successors, (61), 4 states have call predecessors, (61), 6 states have return successors, (61), 4 states have call predecessors, (61), 4 states have call successors, (61) Word has length 390 [2023-11-06 22:58:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:11,526 INFO L225 Difference]: With dead ends: 3568 [2023-11-06 22:58:11,526 INFO L226 Difference]: Without dead ends: 3155 [2023-11-06 22:58:11,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=309, Invalid=813, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:58:11,530 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 565 mSDsluCounter, 2417 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 2717 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:11,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 2717 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1459 Invalid, 1 Unknown, 0 Unchecked, 21.1s Time] [2023-11-06 22:58:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2023-11-06 22:58:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 2330. [2023-11-06 22:58:11,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 1914 states have (on average 1.357889237199582) internal successors, (2599), 1926 states have internal predecessors, (2599), 355 states have call successors, (355), 60 states have call predecessors, (355), 60 states have return successors, (355), 343 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-06 22:58:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 3309 transitions. [2023-11-06 22:58:11,964 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 3309 transitions. Word has length 390 [2023-11-06 22:58:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:11,965 INFO L495 AbstractCegarLoop]: Abstraction has 2330 states and 3309 transitions. [2023-11-06 22:58:11,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 13 states have internal predecessors, (103), 4 states have call successors, (61), 4 states have call predecessors, (61), 6 states have return successors, (61), 4 states have call predecessors, (61), 4 states have call successors, (61) [2023-11-06 22:58:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 3309 transitions. [2023-11-06 22:58:11,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2023-11-06 22:58:11,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:11,971 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:11,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bdf17fa-00df-40b7-af2a-22b8e759c055/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0