./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/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_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/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_da5dbe79-ff7c-438e-906a-5be5186d76aa/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 66c26537aa176e76686ba25b67c86aedfbccc400319942d9855c43a2b470a76b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:30:32,122 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:30:32,258 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:30:32,269 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:30:32,270 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:30:32,312 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:30:32,313 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:30:32,314 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:30:32,315 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:30:32,321 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:30:32,322 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:30:32,322 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:30:32,323 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:30:32,325 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:30:32,325 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:30:32,326 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:30:32,326 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:30:32,327 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:30:32,327 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:30:32,328 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:30:32,328 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:30:32,329 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:30:32,330 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:30:32,330 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:30:32,331 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:30:32,332 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:30:32,332 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:30:32,333 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:30:32,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:30:32,334 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:30:32,336 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:30:32,336 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:30:32,336 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:30:32,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:30:32,337 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:30:32,337 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:30:32,338 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:30:32,338 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:30:32,338 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:30:32,339 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_da5dbe79-ff7c-438e-906a-5be5186d76aa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66c26537aa176e76686ba25b67c86aedfbccc400319942d9855c43a2b470a76b [2023-11-06 22:30:32,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:30:32,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:30:32,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:30:32,725 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:30:32,726 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:30:32,728 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c [2023-11-06 22:30:36,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:30:36,333 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:30:36,334 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c [2023-11-06 22:30:36,342 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/data/f7ce530a5/aa2cfb642bce4d689fed92debd414156/FLAG86b42a825 [2023-11-06 22:30:36,360 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/data/f7ce530a5/aa2cfb642bce4d689fed92debd414156 [2023-11-06 22:30:36,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:30:36,365 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:30:36,367 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:30:36,367 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:30:36,379 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:30:36,380 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:36" (1/1) ... [2023-11-06 22:30:36,381 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f20ac50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:36, skipping insertion in model container [2023-11-06 22:30:36,381 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:36" (1/1) ... [2023-11-06 22:30:36,410 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:30:36,599 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_da5dbe79-ff7c-438e-906a-5be5186d76aa/sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c[331,344] [2023-11-06 22:30:36,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:30:36,641 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:30:36,654 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_da5dbe79-ff7c-438e-906a-5be5186d76aa/sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c[331,344] [2023-11-06 22:30:36,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:30:36,684 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:30:36,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:36 WrapperNode [2023-11-06 22:30:36,685 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:30:36,686 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:30:36,687 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:30:36,687 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:30:36,697 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:36" (1/1) ... [2023-11-06 22:30:36,706 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:36" (1/1) ... [2023-11-06 22:30:36,734 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2023-11-06 22:30:36,734 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:30:36,735 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:30:36,735 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:30:36,735 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:30:36,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:36" (1/1) ... [2023-11-06 22:30:36,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:36" (1/1) ... [2023-11-06 22:30:36,756 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:36" (1/1) ... [2023-11-06 22:30:36,757 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:36" (1/1) ... [2023-11-06 22:30:36,772 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:36" (1/1) ... [2023-11-06 22:30:36,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:36" (1/1) ... [2023-11-06 22:30:36,779 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:36" (1/1) ... [2023-11-06 22:30:36,780 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:36" (1/1) ... [2023-11-06 22:30:36,783 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:30:36,784 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:30:36,784 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:30:36,784 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:30:36,786 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:36" (1/1) ... [2023-11-06 22:30:36,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:30:36,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:36,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:30:36,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:30:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:30:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:30:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:30:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:30:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:30:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:30:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:30:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:30:36,956 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:30:36,958 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:30:37,152 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:30:37,160 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:30:37,160 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:30:37,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:37 BoogieIcfgContainer [2023-11-06 22:30:37,162 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:30:37,165 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:30:37,165 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:30:37,169 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:30:37,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:30:36" (1/3) ... [2023-11-06 22:30:37,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e293103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:37, skipping insertion in model container [2023-11-06 22:30:37,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:36" (2/3) ... [2023-11-06 22:30:37,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e293103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:37, skipping insertion in model container [2023-11-06 22:30:37,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:37" (3/3) ... [2023-11-06 22:30:37,173 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_4.c [2023-11-06 22:30:37,198 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:30:37,198 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:30:37,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:30:37,273 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;@3d76d921, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:30:37,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:30:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:37,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 22:30:37,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:37,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:37,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:37,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:37,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2023-11-06 22:30:37,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:37,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244425333] [2023-11-06 22:30:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:37,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:37,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:37,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388355903] [2023-11-06 22:30:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:37,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:37,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:37,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:37,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:30:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:37,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:30:37,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:37,570 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:37,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:37,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244425333] [2023-11-06 22:30:37,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:37,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388355903] [2023-11-06 22:30:37,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388355903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:37,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:37,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:30:37,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643113785] [2023-11-06 22:30:37,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:37,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:30:37,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:37,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:30:37,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:30:37,632 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:37,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:37,651 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-11-06 22:30:37,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:30:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 22:30:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:37,667 INFO L225 Difference]: With dead ends: 41 [2023-11-06 22:30:37,667 INFO L226 Difference]: Without dead ends: 18 [2023-11-06 22:30:37,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 22:30:37,678 INFO L413 NwaCegarLoop]: 26 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, 26 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 22:30:37,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:30:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-06 22:30:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-06 22:30:37,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:37,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-06 22:30:37,721 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2023-11-06 22:30:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:37,721 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-06 22:30:37,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:37,722 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-06 22:30:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 22:30:37,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:37,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:37,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:37,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:30:37,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:37,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:37,931 INFO L85 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2023-11-06 22:30:37,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:37,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372025460] [2023-11-06 22:30:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:37,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:37,966 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:37,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646058910] [2023-11-06 22:30:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:37,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:37,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:37,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:38,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:30:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:38,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:30:38,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:38,125 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:38,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:38,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372025460] [2023-11-06 22:30:38,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:38,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646058910] [2023-11-06 22:30:38,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646058910] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:38,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:38,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:30:38,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729993396] [2023-11-06 22:30:38,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:38,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:30:38,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:38,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:30:38,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:30:38,131 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:38,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:38,193 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2023-11-06 22:30:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:30:38,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 22:30:38,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:38,196 INFO L225 Difference]: With dead ends: 45 [2023-11-06 22:30:38,196 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 22:30:38,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 22:30:38,199 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:38,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:30:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 22:30:38,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2023-11-06 22:30:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-06 22:30:38,207 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2023-11-06 22:30:38,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:38,208 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-06 22:30:38,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:38,208 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-06 22:30:38,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 22:30:38,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:38,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:38,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:38,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:38,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:38,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:38,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2023-11-06 22:30:38,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:38,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86462919] [2023-11-06 22:30:38,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:38,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:38,437 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:38,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907232967] [2023-11-06 22:30:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:38,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:38,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:38,447 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:38,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:30:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:38,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:30:38,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:38,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:38,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:38,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86462919] [2023-11-06 22:30:38,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:38,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907232967] [2023-11-06 22:30:38,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907232967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:38,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:30:38,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-06 22:30:38,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369833818] [2023-11-06 22:30:38,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:38,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:30:38,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:38,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:30:38,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:30:38,696 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:38,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:38,834 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2023-11-06 22:30:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:30:38,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-06 22:30:38,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:38,836 INFO L225 Difference]: With dead ends: 73 [2023-11-06 22:30:38,836 INFO L226 Difference]: Without dead ends: 59 [2023-11-06 22:30:38,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:30:38,839 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 163 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:38,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 38 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:30:38,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-06 22:30:38,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2023-11-06 22:30:38,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-11-06 22:30:38,849 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 16 [2023-11-06 22:30:38,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:38,849 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-11-06 22:30:38,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:38,850 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-11-06 22:30:38,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 22:30:38,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:38,851 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:38,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 22:30:39,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:39,062 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:39,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:39,063 INFO L85 PathProgramCache]: Analyzing trace with hash -35725226, now seen corresponding path program 1 times [2023-11-06 22:30:39,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:39,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067453943] [2023-11-06 22:30:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:39,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:39,115 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:39,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625297973] [2023-11-06 22:30:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:39,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:39,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:39,118 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:39,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:30:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:39,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:30:39,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:39,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:39,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:39,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067453943] [2023-11-06 22:30:39,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:39,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625297973] [2023-11-06 22:30:39,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625297973] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:39,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:30:39,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-06 22:30:39,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519549476] [2023-11-06 22:30:39,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:39,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:30:39,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:39,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:30:39,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:30:39,689 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:40,066 INFO L93 Difference]: Finished difference Result 155 states and 195 transitions. [2023-11-06 22:30:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:30:40,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-06 22:30:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:40,075 INFO L225 Difference]: With dead ends: 155 [2023-11-06 22:30:40,075 INFO L226 Difference]: Without dead ends: 137 [2023-11-06 22:30:40,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:30:40,085 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 310 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:40,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 87 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:30:40,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-06 22:30:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 64. [2023-11-06 22:30:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2023-11-06 22:30:40,105 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 31 [2023-11-06 22:30:40,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:40,106 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2023-11-06 22:30:40,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2023-11-06 22:30:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-06 22:30:40,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:40,118 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:40,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:40,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:40,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:40,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:40,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1147663820, now seen corresponding path program 2 times [2023-11-06 22:30:40,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:40,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706317114] [2023-11-06 22:30:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:40,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:40,360 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:40,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677405813] [2023-11-06 22:30:40,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:30:40,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:40,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:40,362 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:40,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:30:40,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:30:40,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:40,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:30:40,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-06 22:30:41,130 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:41,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:41,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706317114] [2023-11-06 22:30:41,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:41,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677405813] [2023-11-06 22:30:41,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677405813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:41,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:41,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:30:41,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130942645] [2023-11-06 22:30:41,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:41,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:30:41,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:41,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:30:41,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:30:41,144 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:41,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:41,222 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2023-11-06 22:30:41,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:30:41,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-06 22:30:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:41,225 INFO L225 Difference]: With dead ends: 72 [2023-11-06 22:30:41,226 INFO L226 Difference]: Without dead ends: 70 [2023-11-06 22:30:41,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:30:41,229 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:41,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 36 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:30:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-06 22:30:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-11-06 22:30:41,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2023-11-06 22:30:41,267 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 61 [2023-11-06 22:30:41,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:41,268 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2023-11-06 22:30:41,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:41,268 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2023-11-06 22:30:41,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-06 22:30:41,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:41,270 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:41,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:41,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:41,477 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:41,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:41,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1147723402, now seen corresponding path program 1 times [2023-11-06 22:30:41,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:41,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947661347] [2023-11-06 22:30:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:41,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:41,507 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:41,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433930902] [2023-11-06 22:30:41,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:41,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:41,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:41,525 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:41,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:30:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:41,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:30:41,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:42,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:42,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:42,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947661347] [2023-11-06 22:30:42,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:42,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433930902] [2023-11-06 22:30:42,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433930902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:42,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:30:42,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-11-06 22:30:42,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151250779] [2023-11-06 22:30:42,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:42,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:30:42,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:42,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:30:42,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:30:42,449 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:43,283 INFO L93 Difference]: Finished difference Result 463 states and 570 transitions. [2023-11-06 22:30:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:30:43,284 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-06 22:30:43,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:43,288 INFO L225 Difference]: With dead ends: 463 [2023-11-06 22:30:43,288 INFO L226 Difference]: Without dead ends: 424 [2023-11-06 22:30:43,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:30:43,291 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 747 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:43,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 184 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:30:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-06 22:30:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 130. [2023-11-06 22:30:43,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.2868217054263567) internal successors, (166), 129 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 166 transitions. [2023-11-06 22:30:43,314 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 166 transitions. Word has length 61 [2023-11-06 22:30:43,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:43,314 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 166 transitions. [2023-11-06 22:30:43,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 166 transitions. [2023-11-06 22:30:43,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-06 22:30:43,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:43,317 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:43,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:43,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:43,524 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:43,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:43,524 INFO L85 PathProgramCache]: Analyzing trace with hash 4942966, now seen corresponding path program 2 times [2023-11-06 22:30:43,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:43,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455737555] [2023-11-06 22:30:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:43,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:43,576 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:43,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964246108] [2023-11-06 22:30:43,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:30:43,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:43,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:43,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:43,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:30:43,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:30:43,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:43,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:30:43,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2023-11-06 22:30:44,695 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:44,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:44,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455737555] [2023-11-06 22:30:44,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:44,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964246108] [2023-11-06 22:30:44,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964246108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:44,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:44,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:30:44,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658472658] [2023-11-06 22:30:44,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:44,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:30:44,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:44,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:30:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:30:44,702 INFO L87 Difference]: Start difference. First operand 130 states and 166 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:44,815 INFO L93 Difference]: Finished difference Result 138 states and 175 transitions. [2023-11-06 22:30:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:30:44,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-06 22:30:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:44,823 INFO L225 Difference]: With dead ends: 138 [2023-11-06 22:30:44,823 INFO L226 Difference]: Without dead ends: 136 [2023-11-06 22:30:44,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:30:44,825 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:44,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 51 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:30:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-06 22:30:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-11-06 22:30:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.2814814814814814) internal successors, (173), 135 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 173 transitions. [2023-11-06 22:30:44,861 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 173 transitions. Word has length 121 [2023-11-06 22:30:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:44,862 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 173 transitions. [2023-11-06 22:30:44,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 173 transitions. [2023-11-06 22:30:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-06 22:30:44,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:44,875 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:44,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:45,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:45,088 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:45,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1531894057, now seen corresponding path program 1 times [2023-11-06 22:30:45,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:45,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136063647] [2023-11-06 22:30:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:45,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:45,138 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:45,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936032131] [2023-11-06 22:30:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:45,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:45,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:45,140 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:45,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:30:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:45,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:30:45,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:30:46,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:30:47,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:47,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136063647] [2023-11-06 22:30:47,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:47,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936032131] [2023-11-06 22:30:47,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936032131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:47,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:30:47,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2023-11-06 22:30:47,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828389605] [2023-11-06 22:30:47,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:47,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-06 22:30:47,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:47,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-06 22:30:47,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2023-11-06 22:30:47,432 INFO L87 Difference]: Start difference. First operand 136 states and 173 transitions. Second operand has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:50,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:50,025 INFO L93 Difference]: Finished difference Result 1222 states and 1488 transitions. [2023-11-06 22:30:50,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 22:30:50,026 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2023-11-06 22:30:50,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:50,034 INFO L225 Difference]: With dead ends: 1222 [2023-11-06 22:30:50,034 INFO L226 Difference]: Without dead ends: 1147 [2023-11-06 22:30:50,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2023-11-06 22:30:50,040 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2241 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2241 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:50,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2241 Valid, 378 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:30:50,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-11-06 22:30:50,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 256. [2023-11-06 22:30:50,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.2901960784313726) internal successors, (329), 255 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 329 transitions. [2023-11-06 22:30:50,072 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 329 transitions. Word has length 127 [2023-11-06 22:30:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:50,073 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 329 transitions. [2023-11-06 22:30:50,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 329 transitions. [2023-11-06 22:30:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-11-06 22:30:50,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:50,078 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:50,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:50,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:30:50,286 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:50,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:50,286 INFO L85 PathProgramCache]: Analyzing trace with hash -456351959, now seen corresponding path program 2 times [2023-11-06 22:30:50,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:50,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193316308] [2023-11-06 22:30:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:50,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:50,364 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:50,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493819207] [2023-11-06 22:30:50,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:30:50,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:50,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:50,366 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:50,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:30:50,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:30:50,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:50,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-06 22:30:50,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:30:52,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:30:56,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:56,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193316308] [2023-11-06 22:30:56,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:56,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493819207] [2023-11-06 22:30:56,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493819207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:56,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:30:56,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2023-11-06 22:30:56,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964815016] [2023-11-06 22:30:56,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:56,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-11-06 22:30:56,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:56,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-11-06 22:30:56,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2023-11-06 22:30:56,123 INFO L87 Difference]: Start difference. First operand 256 states and 329 transitions. Second operand has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:05,640 INFO L93 Difference]: Finished difference Result 2482 states and 3024 transitions. [2023-11-06 22:31:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-06 22:31:05,641 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2023-11-06 22:31:05,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:05,655 INFO L225 Difference]: With dead ends: 2482 [2023-11-06 22:31:05,655 INFO L226 Difference]: Without dead ends: 2347 [2023-11-06 22:31:05,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2023-11-06 22:31:05,666 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5670 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5670 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:05,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5670 Valid, 759 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:31:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2023-11-06 22:31:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 496. [2023-11-06 22:31:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 1.2949494949494949) internal successors, (641), 495 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 641 transitions. [2023-11-06 22:31:05,721 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 641 transitions. Word has length 247 [2023-11-06 22:31:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:05,721 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 641 transitions. [2023-11-06 22:31:05,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 641 transitions. [2023-11-06 22:31:05,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2023-11-06 22:31:05,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:05,733 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:05,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:05,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:31:05,943 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:05,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:05,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1703865129, now seen corresponding path program 3 times [2023-11-06 22:31:05,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:05,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694863290] [2023-11-06 22:31:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:05,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:06,047 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:06,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536733610] [2023-11-06 22:31:06,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:31:06,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:06,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:06,049 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:06,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:31:06,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:31:06,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:06,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:31:06,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21953 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21949 trivial. 0 not checked. [2023-11-06 22:31:09,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 21953 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21949 trivial. 0 not checked. [2023-11-06 22:31:33,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:33,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694863290] [2023-11-06 22:31:33,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:33,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536733610] [2023-11-06 22:31:33,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536733610] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:33,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:33,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 22:31:33,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927720207] [2023-11-06 22:31:33,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:33,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:31:33,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:33,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:31:33,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:31:33,434 INFO L87 Difference]: Start difference. First operand 496 states and 641 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:36,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:36,050 INFO L93 Difference]: Finished difference Result 522 states and 674 transitions. [2023-11-06 22:31:36,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:31:36,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 487 [2023-11-06 22:31:36,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:36,056 INFO L225 Difference]: With dead ends: 522 [2023-11-06 22:31:36,056 INFO L226 Difference]: Without dead ends: 520 [2023-11-06 22:31:36,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 959 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:31:36,058 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 114 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:36,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 101 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:31:36,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2023-11-06 22:31:36,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2023-11-06 22:31:36,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.2890173410404624) internal successors, (669), 519 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 669 transitions. [2023-11-06 22:31:36,132 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 669 transitions. Word has length 487 [2023-11-06 22:31:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:36,134 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 669 transitions. [2023-11-06 22:31:36,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 669 transitions. [2023-11-06 22:31:36,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2023-11-06 22:31:36,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:36,149 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:36,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:36,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:31:36,357 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:36,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:36,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1887291253, now seen corresponding path program 4 times [2023-11-06 22:31:36,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:36,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51053937] [2023-11-06 22:31:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:36,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:36,456 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:36,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721441621] [2023-11-06 22:31:36,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:31:36,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:36,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:36,458 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:36,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:31:36,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:31:36,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:36,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:31:36,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:37,039 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-06 22:31:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 831 proven. 4 refuted. 0 times theorem prover too weak. 21194 trivial. 0 not checked. [2023-11-06 22:31:37,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 831 proven. 4 refuted. 0 times theorem prover too weak. 21194 trivial. 0 not checked. [2023-11-06 22:31:37,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:37,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51053937] [2023-11-06 22:31:37,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:37,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721441621] [2023-11-06 22:31:37,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721441621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:37,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:37,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 22:31:37,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046326199] [2023-11-06 22:31:37,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:37,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:31:37,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:37,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:31:37,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:31:37,179 INFO L87 Difference]: Start difference. First operand 520 states and 669 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:37,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:37,534 INFO L93 Difference]: Finished difference Result 1108 states and 1415 transitions. [2023-11-06 22:31:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:31:37,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 511 [2023-11-06 22:31:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:37,539 INFO L225 Difference]: With dead ends: 1108 [2023-11-06 22:31:37,539 INFO L226 Difference]: Without dead ends: 596 [2023-11-06 22:31:37,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 1012 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:31:37,542 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:37,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 98 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:31:37,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-11-06 22:31:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 520. [2023-11-06 22:31:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.28131021194605) internal successors, (665), 519 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 665 transitions. [2023-11-06 22:31:37,611 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 665 transitions. Word has length 511 [2023-11-06 22:31:37,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:37,611 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 665 transitions. [2023-11-06 22:31:37,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 665 transitions. [2023-11-06 22:31:37,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2023-11-06 22:31:37,616 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:37,617 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 90, 47, 47, 6, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:37,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:37,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:31:37,828 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:37,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:37,828 INFO L85 PathProgramCache]: Analyzing trace with hash 593762805, now seen corresponding path program 1 times [2023-11-06 22:31:37,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:37,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052716338] [2023-11-06 22:31:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:37,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:37,936 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:37,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457532006] [2023-11-06 22:31:37,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:37,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:37,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:37,939 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:37,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:31:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:38,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 1681 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-06 22:31:38,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-06 22:31:46,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-06 22:31:57,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:57,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052716338] [2023-11-06 22:31:57,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:57,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457532006] [2023-11-06 22:31:57,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457532006] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:57,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:57,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2023-11-06 22:31:57,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686502198] [2023-11-06 22:31:57,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:57,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-11-06 22:31:57,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:57,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-11-06 22:31:57,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2023-11-06 22:31:57,943 INFO L87 Difference]: Start difference. First operand 520 states and 665 transitions. Second operand has 194 states, 194 states have (on average 4.943298969072165) internal successors, (959), 193 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:11,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:11,153 INFO L93 Difference]: Finished difference Result 9490 states and 11326 transitions. [2023-11-06 22:33:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-11-06 22:33:11,154 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 4.943298969072165) internal successors, (959), 193 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 511 [2023-11-06 22:33:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:11,208 INFO L225 Difference]: With dead ends: 9490 [2023-11-06 22:33:11,208 INFO L226 Difference]: Without dead ends: 9211 [2023-11-06 22:33:11,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1115 GetRequests, 828 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2023-11-06 22:33:11,221 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 11953 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 986 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11953 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:33:11,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11953 Valid, 1522 Invalid, 2436 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [986 Valid, 1450 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-11-06 22:33:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9211 states. [2023-11-06 22:33:11,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9211 to 1000. [2023-11-06 22:33:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 1.2902902902902902) internal successors, (1289), 999 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:11,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1289 transitions. [2023-11-06 22:33:11,428 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1289 transitions. Word has length 511 [2023-11-06 22:33:11,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:11,429 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1289 transitions. [2023-11-06 22:33:11,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 4.943298969072165) internal successors, (959), 193 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1289 transitions. [2023-11-06 22:33:11,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 992 [2023-11-06 22:33:11,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:11,443 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 186, 95, 95, 6, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:11,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:11,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:33:11,656 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:33:11,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:11,657 INFO L85 PathProgramCache]: Analyzing trace with hash 847622645, now seen corresponding path program 2 times [2023-11-06 22:33:11,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:11,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056386687] [2023-11-06 22:33:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:11,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:11,836 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:33:11,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907178579] [2023-11-06 22:33:11,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:33:11,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:11,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:11,838 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:11,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5dbe79-ff7c-438e-906a-5be5186d76aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:33:12,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:33:12,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:13,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 3265 conjuncts, 193 conjunts are in the unsatisfiable core [2023-11-06 22:33:13,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 90045 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-06 22:33:35,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 90045 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-06 22:34:16,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:16,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056386687] [2023-11-06 22:34:16,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:16,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907178579] [2023-11-06 22:34:16,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907178579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:16,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:34:16,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193] total 385 [2023-11-06 22:34:16,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270901485] [2023-11-06 22:34:16,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:16,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2023-11-06 22:34:16,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:16,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2023-11-06 22:34:16,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73923, Invalid=74687, Unknown=0, NotChecked=0, Total=148610 [2023-11-06 22:34:16,882 INFO L87 Difference]: Start difference. First operand 1000 states and 1289 transitions. Second operand has 386 states, 386 states have (on average 4.971502590673575) internal successors, (1919), 385 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)