./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-39.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/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_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-39.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/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_81cca829-28c9-40a6-a7ae-261ddc88c99c/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 e816ebcf30f2d29dec7c2f2805587c40ad591ee9556f47b4bacdfa3908977d3e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:58:47,082 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:58:47,152 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:58:47,158 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:58:47,159 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:58:47,184 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:58:47,185 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:58:47,185 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:58:47,186 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:58:47,187 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:58:47,188 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:58:47,189 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:58:47,189 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:58:47,190 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:58:47,191 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:58:47,191 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:58:47,192 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:58:47,192 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:58:47,193 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:58:47,194 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:58:47,194 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:58:47,195 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:58:47,195 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:58:47,196 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:58:47,196 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:58:47,197 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:58:47,197 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:58:47,198 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:58:47,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:58:47,199 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:58:47,199 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:58:47,200 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:58:47,200 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:58:47,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:58:47,201 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:58:47,201 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:58:47,201 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:58:47,201 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:58:47,202 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:58:47,202 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_81cca829-28c9-40a6-a7ae-261ddc88c99c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e816ebcf30f2d29dec7c2f2805587c40ad591ee9556f47b4bacdfa3908977d3e [2023-11-06 22:58:47,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:58:47,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:58:47,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:58:47,552 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:58:47,552 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:58:47,554 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-39.i [2023-11-06 22:58:50,709 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:58:51,021 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:58:51,021 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-39.i [2023-11-06 22:58:51,053 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/data/cc55bbd30/f6d2a0a1b67a4a97816ca68b7444ff93/FLAG2608a77b5 [2023-11-06 22:58:51,069 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/data/cc55bbd30/f6d2a0a1b67a4a97816ca68b7444ff93 [2023-11-06 22:58:51,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:58:51,073 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:58:51,075 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:58:51,075 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:58:51,081 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:58:51,082 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:51" (1/1) ... [2023-11-06 22:58:51,083 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ff2baeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:51, skipping insertion in model container [2023-11-06 22:58:51,084 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:51" (1/1) ... [2023-11-06 22:58:51,159 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:58:51,349 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_81cca829-28c9-40a6-a7ae-261ddc88c99c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-39.i[916,929] [2023-11-06 22:58:51,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:58:51,731 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:58:51,744 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_81cca829-28c9-40a6-a7ae-261ddc88c99c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-39.i[916,929] [2023-11-06 22:58:51,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:58:51,967 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:58:51,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:51 WrapperNode [2023-11-06 22:58:51,967 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:58:51,969 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:58:51,969 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:58:51,969 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:58:51,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:51" (1/1) ... [2023-11-06 22:58:52,017 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:51" (1/1) ... [2023-11-06 22:58:52,153 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 808 [2023-11-06 22:58:52,154 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:58:52,155 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:58:52,156 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:58:52,156 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:58:52,166 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:51" (1/1) ... [2023-11-06 22:58:52,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:51" (1/1) ... [2023-11-06 22:58:52,192 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:51" (1/1) ... [2023-11-06 22:58:52,193 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:51" (1/1) ... [2023-11-06 22:58:52,260 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:51" (1/1) ... [2023-11-06 22:58:52,280 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:51" (1/1) ... [2023-11-06 22:58:52,309 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:51" (1/1) ... [2023-11-06 22:58:52,322 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:51" (1/1) ... [2023-11-06 22:58:52,349 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:58:52,350 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:58:52,350 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:58:52,350 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:58:52,351 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:51" (1/1) ... [2023-11-06 22:58:52,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:58:52,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:52,383 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:52,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:58:52,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:58:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:58:52,424 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:58:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:58:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:58:52,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:58:52,638 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:58:52,641 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:58:54,271 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:58:54,291 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:58:54,291 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:58:54,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:54 BoogieIcfgContainer [2023-11-06 22:58:54,295 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:58:54,301 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:58:54,302 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:58:54,305 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:58:54,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:58:51" (1/3) ... [2023-11-06 22:58:54,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab69095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:54, skipping insertion in model container [2023-11-06 22:58:54,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:51" (2/3) ... [2023-11-06 22:58:54,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab69095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:54, skipping insertion in model container [2023-11-06 22:58:54,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:54" (3/3) ... [2023-11-06 22:58:54,310 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-39.i [2023-11-06 22:58:54,332 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:58:54,333 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:58:54,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:58:54,427 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;@3450d815, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:58:54,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:58:54,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 299 states, 234 states have (on average 1.5769230769230769) internal successors, (369), 235 states have internal predecessors, (369), 62 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-06 22:58:54,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-06 22:58:54,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:54,478 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:54,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:54,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:54,485 INFO L85 PathProgramCache]: Analyzing trace with hash 328845047, now seen corresponding path program 1 times [2023-11-06 22:58:54,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:54,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466052430] [2023-11-06 22:58:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:54,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:55,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:55,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466052430] [2023-11-06 22:58:55,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:58:55,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042711329] [2023-11-06 22:58:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:55,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:55,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:55,011 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:55,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:58:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:55,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:58:55,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 7442 trivial. 0 not checked. [2023-11-06 22:58:55,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:55,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042711329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:55,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:55,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:58:55,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635763911] [2023-11-06 22:58:55,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:55,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:58:55,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:55,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:58:55,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:58:55,676 INFO L87 Difference]: Start difference. First operand has 299 states, 234 states have (on average 1.5769230769230769) internal successors, (369), 235 states have internal predecessors, (369), 62 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) Second operand has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 2 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-06 22:58:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:55,743 INFO L93 Difference]: Finished difference Result 591 states and 1042 transitions. [2023-11-06 22:58:55,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:58:55,746 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 2 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 2 states have call successors, (62) Word has length 458 [2023-11-06 22:58:55,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:55,759 INFO L225 Difference]: With dead ends: 591 [2023-11-06 22:58:55,764 INFO L226 Difference]: Without dead ends: 295 [2023-11-06 22:58:55,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 457 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 22:58:55,781 INFO L413 NwaCegarLoop]: 486 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, 486 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 22:58:55,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:58:55,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-11-06 22:58:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2023-11-06 22:58:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 231 states have (on average 1.567099567099567) internal successors, (362), 231 states have internal predecessors, (362), 62 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-06 22:58:55,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 486 transitions. [2023-11-06 22:58:55,903 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 486 transitions. Word has length 458 [2023-11-06 22:58:55,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:55,905 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 486 transitions. [2023-11-06 22:58:55,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 2 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-06 22:58:55,906 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 486 transitions. [2023-11-06 22:58:55,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-06 22:58:55,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:55,923 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:55,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:58:56,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:58:56,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:56,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:56,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1751032829, now seen corresponding path program 1 times [2023-11-06 22:58:56,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:56,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417979291] [2023-11-06 22:58:56,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:56,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:56,302 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:58:56,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007476562] [2023-11-06 22:58:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:56,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:56,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:56,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:56,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:58:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:56,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:58:56,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:58:57,077 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:57,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:57,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417979291] [2023-11-06 22:58:57,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:58:57,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007476562] [2023-11-06 22:58:57,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007476562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:57,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:57,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:58:57,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597800869] [2023-11-06 22:58:57,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:57,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:58:57,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:57,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:58:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:58:57,091 INFO L87 Difference]: Start difference. First operand 295 states and 486 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:58:57,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:57,267 INFO L93 Difference]: Finished difference Result 876 states and 1446 transitions. [2023-11-06 22:58:57,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:58:57,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 458 [2023-11-06 22:58:57,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:57,282 INFO L225 Difference]: With dead ends: 876 [2023-11-06 22:58:57,283 INFO L226 Difference]: Without dead ends: 584 [2023-11-06 22:58:57,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:58:57,285 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 430 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:57,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 1119 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:58:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-11-06 22:58:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2023-11-06 22:58:57,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 455 states have (on average 1.5626373626373626) internal successors, (711), 455 states have internal predecessors, (711), 124 states have call successors, (124), 2 states have call predecessors, (124), 2 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2023-11-06 22:58:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 959 transitions. [2023-11-06 22:58:57,365 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 959 transitions. Word has length 458 [2023-11-06 22:58:57,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:57,367 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 959 transitions. [2023-11-06 22:58:57,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:58:57,368 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 959 transitions. [2023-11-06 22:58:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-06 22:58:57,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:57,379 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:57,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:58:57,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:57,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:57,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:57,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1119408398, now seen corresponding path program 1 times [2023-11-06 22:58:57,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:57,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444148860] [2023-11-06 22:58:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:57,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:57,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:58:57,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980901661] [2023-11-06 22:58:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:57,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:57,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:57,752 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:57,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:58:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:58,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:58:58,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:58:58,429 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:58,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:58,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444148860] [2023-11-06 22:58:58,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:58:58,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980901661] [2023-11-06 22:58:58,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980901661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:58,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:58,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:58:58,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075437446] [2023-11-06 22:58:58,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:58,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:58:58,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:58:58,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:58:58,435 INFO L87 Difference]: Start difference. First operand 582 states and 959 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:58:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:58,650 INFO L93 Difference]: Finished difference Result 1524 states and 2507 transitions. [2023-11-06 22:58:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:58:58,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 459 [2023-11-06 22:58:58,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:58,659 INFO L225 Difference]: With dead ends: 1524 [2023-11-06 22:58:58,660 INFO L226 Difference]: Without dead ends: 945 [2023-11-06 22:58:58,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:58:58,663 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 266 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:58,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 993 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:58:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2023-11-06 22:58:58,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 941. [2023-11-06 22:58:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 776 states have (on average 1.5721649484536082) internal successors, (1220), 778 states have internal predecessors, (1220), 160 states have call successors, (160), 4 states have call predecessors, (160), 4 states have return successors, (160), 158 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-06 22:58:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1540 transitions. [2023-11-06 22:58:58,769 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1540 transitions. Word has length 459 [2023-11-06 22:58:58,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:58,773 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 1540 transitions. [2023-11-06 22:58:58,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:58:58,773 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1540 transitions. [2023-11-06 22:58:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-06 22:58:58,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:58,785 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:58,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:58,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:58,994 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:58,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:58,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1247286196, now seen corresponding path program 1 times [2023-11-06 22:58:58,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:58,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748963693] [2023-11-06 22:58:58,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:58,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:59,136 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:58:59,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674684514] [2023-11-06 22:58:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:59,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:59,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:59,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:59,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:58:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:59,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:58:59,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:58:59,731 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:59,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:59,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748963693] [2023-11-06 22:58:59,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:58:59,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674684514] [2023-11-06 22:58:59,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674684514] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:59,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:59,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:58:59,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302435451] [2023-11-06 22:58:59,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:59,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:58:59,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:59,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:58:59,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:58:59,736 INFO L87 Difference]: Start difference. First operand 941 states and 1540 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:58:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:59,895 INFO L93 Difference]: Finished difference Result 2817 states and 4614 transitions. [2023-11-06 22:58:59,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:58:59,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 459 [2023-11-06 22:58:59,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:59,912 INFO L225 Difference]: With dead ends: 2817 [2023-11-06 22:58:59,912 INFO L226 Difference]: Without dead ends: 1879 [2023-11-06 22:58:59,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:58:59,916 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 481 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:59,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 957 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:58:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2023-11-06 22:59:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1877. [2023-11-06 22:59:00,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1548 states have (on average 1.5684754521963824) internal successors, (2428), 1552 states have internal predecessors, (2428), 320 states have call successors, (320), 8 states have call predecessors, (320), 8 states have return successors, (320), 316 states have call predecessors, (320), 320 states have call successors, (320) [2023-11-06 22:59:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 3068 transitions. [2023-11-06 22:59:00,148 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 3068 transitions. Word has length 459 [2023-11-06 22:59:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:00,149 INFO L495 AbstractCegarLoop]: Abstraction has 1877 states and 3068 transitions. [2023-11-06 22:59:00,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 3068 transitions. [2023-11-06 22:59:00,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-06 22:59:00,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:00,163 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:00,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:00,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:00,372 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:00,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:00,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1269918450, now seen corresponding path program 1 times [2023-11-06 22:59:00,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:00,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375097805] [2023-11-06 22:59:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:00,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:00,496 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:00,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153536934] [2023-11-06 22:59:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:00,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:00,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:00,498 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:00,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:59:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:01,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:59:01,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:59:01,637 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:59:01,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:01,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375097805] [2023-11-06 22:59:01,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:01,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153536934] [2023-11-06 22:59:01,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153536934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:01,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:01,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:59:01,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766037675] [2023-11-06 22:59:01,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:01,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:59:01,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:01,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:59:01,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:59:01,650 INFO L87 Difference]: Start difference. First operand 1877 states and 3068 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:02,407 INFO L93 Difference]: Finished difference Result 6183 states and 10131 transitions. [2023-11-06 22:59:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:59:02,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 459 [2023-11-06 22:59:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:02,438 INFO L225 Difference]: With dead ends: 6183 [2023-11-06 22:59:02,438 INFO L226 Difference]: Without dead ends: 4309 [2023-11-06 22:59:02,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:59:02,449 INFO L413 NwaCegarLoop]: 1114 mSDtfsCounter, 1876 mSDsluCounter, 2153 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1876 SdHoareTripleChecker+Valid, 3267 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:02,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1876 Valid, 3267 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:59:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2023-11-06 22:59:02,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 1877. [2023-11-06 22:59:02,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1548 states have (on average 1.5633074935400517) internal successors, (2420), 1552 states have internal predecessors, (2420), 320 states have call successors, (320), 8 states have call predecessors, (320), 8 states have return successors, (320), 316 states have call predecessors, (320), 320 states have call successors, (320) [2023-11-06 22:59:02,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 3060 transitions. [2023-11-06 22:59:02,901 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 3060 transitions. Word has length 459 [2023-11-06 22:59:02,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:02,902 INFO L495 AbstractCegarLoop]: Abstraction has 1877 states and 3060 transitions. [2023-11-06 22:59:02,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:02,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 3060 transitions. [2023-11-06 22:59:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-06 22:59:02,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:02,915 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:02,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:03,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:03,124 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:03,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:03,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1338869008, now seen corresponding path program 1 times [2023-11-06 22:59:03,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:03,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035208256] [2023-11-06 22:59:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:03,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:03,214 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:03,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001781925] [2023-11-06 22:59:03,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:03,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:03,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:03,217 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:03,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:59:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:03,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:59:03,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:59:04,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:59:04,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:04,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035208256] [2023-11-06 22:59:04,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:04,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001781925] [2023-11-06 22:59:04,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001781925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:04,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:04,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:59:04,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858096579] [2023-11-06 22:59:04,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:04,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:59:04,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:04,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:59:04,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:59:04,303 INFO L87 Difference]: Start difference. First operand 1877 states and 3060 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:04,579 INFO L93 Difference]: Finished difference Result 5613 states and 9154 transitions. [2023-11-06 22:59:04,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:59:04,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 459 [2023-11-06 22:59:04,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:04,609 INFO L225 Difference]: With dead ends: 5613 [2023-11-06 22:59:04,609 INFO L226 Difference]: Without dead ends: 3739 [2023-11-06 22:59:04,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:59:04,618 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 302 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:04,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1183 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:59:04,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2023-11-06 22:59:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3735. [2023-11-06 22:59:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3735 states, 3078 states have (on average 1.5607537361923327) internal successors, (4804), 3086 states have internal predecessors, (4804), 640 states have call successors, (640), 16 states have call predecessors, (640), 16 states have return successors, (640), 632 states have call predecessors, (640), 640 states have call successors, (640) [2023-11-06 22:59:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3735 states to 3735 states and 6084 transitions. [2023-11-06 22:59:05,066 INFO L78 Accepts]: Start accepts. Automaton has 3735 states and 6084 transitions. Word has length 459 [2023-11-06 22:59:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:05,068 INFO L495 AbstractCegarLoop]: Abstraction has 3735 states and 6084 transitions. [2023-11-06 22:59:05,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3735 states and 6084 transitions. [2023-11-06 22:59:05,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-06 22:59:05,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:05,082 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:05,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:05,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:05,290 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:05,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:05,291 INFO L85 PathProgramCache]: Analyzing trace with hash 905703975, now seen corresponding path program 1 times [2023-11-06 22:59:05,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:05,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941558239] [2023-11-06 22:59:05,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:05,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:05,393 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:05,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966843417] [2023-11-06 22:59:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:05,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:05,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:05,395 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:05,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:59:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:05,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:59:05,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:59:06,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:59:06,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:06,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941558239] [2023-11-06 22:59:06,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:06,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966843417] [2023-11-06 22:59:06,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966843417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:06,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:06,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:59:06,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883076077] [2023-11-06 22:59:06,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:06,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:59:06,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:06,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:59:06,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:59:06,072 INFO L87 Difference]: Start difference. First operand 3735 states and 6084 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:07,269 INFO L93 Difference]: Finished difference Result 9267 states and 15085 transitions. [2023-11-06 22:59:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:59:07,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 459 [2023-11-06 22:59:07,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:07,325 INFO L225 Difference]: With dead ends: 9267 [2023-11-06 22:59:07,325 INFO L226 Difference]: Without dead ends: 7393 [2023-11-06 22:59:07,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:59:07,334 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 1461 mSDsluCounter, 2085 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 2892 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:07,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1461 Valid, 2892 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:59:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7393 states. [2023-11-06 22:59:08,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7393 to 7152. [2023-11-06 22:59:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7152 states, 5986 states have (on average 1.5606414968259272) internal successors, (9342), 6007 states have internal predecessors, (9342), 1132 states have call successors, (1132), 33 states have call predecessors, (1132), 33 states have return successors, (1132), 1111 states have call predecessors, (1132), 1132 states have call successors, (1132) [2023-11-06 22:59:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7152 states to 7152 states and 11606 transitions. [2023-11-06 22:59:08,217 INFO L78 Accepts]: Start accepts. Automaton has 7152 states and 11606 transitions. Word has length 459 [2023-11-06 22:59:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:08,218 INFO L495 AbstractCegarLoop]: Abstraction has 7152 states and 11606 transitions. [2023-11-06 22:59:08,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 7152 states and 11606 transitions. [2023-11-06 22:59:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-06 22:59:08,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:08,227 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:08,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:08,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:59:08,436 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:08,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:08,437 INFO L85 PathProgramCache]: Analyzing trace with hash 548200295, now seen corresponding path program 1 times [2023-11-06 22:59:08,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:08,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976250670] [2023-11-06 22:59:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:08,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:08,519 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:08,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035384911] [2023-11-06 22:59:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:08,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:08,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:08,521 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:08,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:59:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:09,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:59:09,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:59:09,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:59:09,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:09,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976250670] [2023-11-06 22:59:09,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:09,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035384911] [2023-11-06 22:59:09,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035384911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:09,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:09,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:59:09,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289864754] [2023-11-06 22:59:09,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:09,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:59:09,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:09,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:59:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:59:09,284 INFO L87 Difference]: Start difference. First operand 7152 states and 11606 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:10,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:10,318 INFO L93 Difference]: Finished difference Result 12419 states and 20139 transitions. [2023-11-06 22:59:10,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:59:10,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 459 [2023-11-06 22:59:10,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:10,375 INFO L225 Difference]: With dead ends: 12419 [2023-11-06 22:59:10,375 INFO L226 Difference]: Without dead ends: 7165 [2023-11-06 22:59:10,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:59:10,388 INFO L413 NwaCegarLoop]: 845 mSDtfsCounter, 886 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:10,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1596 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:59:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2023-11-06 22:59:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 5257. [2023-11-06 22:59:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 4440 states have (on average 1.5594594594594595) internal successors, (6924), 4456 states have internal predecessors, (6924), 792 states have call successors, (792), 24 states have call predecessors, (792), 24 states have return successors, (792), 776 states have call predecessors, (792), 792 states have call successors, (792) [2023-11-06 22:59:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 8508 transitions. [2023-11-06 22:59:10,907 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 8508 transitions. Word has length 459 [2023-11-06 22:59:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:10,908 INFO L495 AbstractCegarLoop]: Abstraction has 5257 states and 8508 transitions. [2023-11-06 22:59:10,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 8508 transitions. [2023-11-06 22:59:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-06 22:59:10,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:10,919 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:10,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:11,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:59:11,129 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:11,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:11,130 INFO L85 PathProgramCache]: Analyzing trace with hash 10860654, now seen corresponding path program 1 times [2023-11-06 22:59:11,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:11,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684147618] [2023-11-06 22:59:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:11,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:11,234 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:11,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385240595] [2023-11-06 22:59:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:11,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:11,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:11,236 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:11,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:59:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:11,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:59:11,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3687 proven. 72 refuted. 0 times theorem prover too weak. 3805 trivial. 0 not checked. [2023-11-06 22:59:12,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 111 proven. 72 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-06 22:59:12,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:12,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684147618] [2023-11-06 22:59:12,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:12,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385240595] [2023-11-06 22:59:12,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385240595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:12,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:59:12,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:59:12,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263171245] [2023-11-06 22:59:12,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:12,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:59:12,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:12,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:59:12,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:59:12,669 INFO L87 Difference]: Start difference. First operand 5257 states and 8508 transitions. Second operand has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 3 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 3 states have call predecessors, (87), 3 states have call successors, (87) [2023-11-06 22:59:13,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:13,582 INFO L93 Difference]: Finished difference Result 10591 states and 17085 transitions. [2023-11-06 22:59:13,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:59:13,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 3 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 3 states have call predecessors, (87), 3 states have call successors, (87) Word has length 460 [2023-11-06 22:59:13,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:13,605 INFO L225 Difference]: With dead ends: 10591 [2023-11-06 22:59:13,605 INFO L226 Difference]: Without dead ends: 5337 [2023-11-06 22:59:13,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 912 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:59:13,620 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 849 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:13,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1069 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:59:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5337 states. [2023-11-06 22:59:14,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5337 to 5289. [2023-11-06 22:59:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5289 states, 4464 states have (on average 1.5456989247311828) internal successors, (6900), 4480 states have internal predecessors, (6900), 792 states have call successors, (792), 32 states have call predecessors, (792), 32 states have return successors, (792), 776 states have call predecessors, (792), 792 states have call successors, (792) [2023-11-06 22:59:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 8484 transitions. [2023-11-06 22:59:14,284 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 8484 transitions. Word has length 460 [2023-11-06 22:59:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:14,285 INFO L495 AbstractCegarLoop]: Abstraction has 5289 states and 8484 transitions. [2023-11-06 22:59:14,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 3 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 3 states have call predecessors, (87), 3 states have call successors, (87) [2023-11-06 22:59:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 8484 transitions. [2023-11-06 22:59:14,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-06 22:59:14,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:14,296 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:14,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:14,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:14,510 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:14,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:14,510 INFO L85 PathProgramCache]: Analyzing trace with hash -624501667, now seen corresponding path program 1 times [2023-11-06 22:59:14,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:14,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492431443] [2023-11-06 22:59:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:14,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:14,667 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:14,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545430935] [2023-11-06 22:59:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:14,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:14,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:14,672 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:14,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:59:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:15,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 1260 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:59:15,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:59:15,959 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:59:15,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:15,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492431443] [2023-11-06 22:59:15,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:15,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545430935] [2023-11-06 22:59:15,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545430935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:15,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:15,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:59:15,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878387748] [2023-11-06 22:59:15,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:15,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:59:15,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:15,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:59:15,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:59:15,963 INFO L87 Difference]: Start difference. First operand 5289 states and 8484 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:16,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:16,621 INFO L93 Difference]: Finished difference Result 15861 states and 25446 transitions. [2023-11-06 22:59:16,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:59:16,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 461 [2023-11-06 22:59:16,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:16,656 INFO L225 Difference]: With dead ends: 15861 [2023-11-06 22:59:16,656 INFO L226 Difference]: Without dead ends: 10575 [2023-11-06 22:59:16,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:59:16,670 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 238 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:16,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1087 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:59:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10575 states. [2023-11-06 22:59:17,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10575 to 10545. [2023-11-06 22:59:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10545 states, 8896 states have (on average 1.5341726618705036) internal successors, (13648), 8928 states have internal predecessors, (13648), 1584 states have call successors, (1584), 64 states have call predecessors, (1584), 64 states have return successors, (1584), 1552 states have call predecessors, (1584), 1584 states have call successors, (1584) [2023-11-06 22:59:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10545 states to 10545 states and 16816 transitions. [2023-11-06 22:59:17,908 INFO L78 Accepts]: Start accepts. Automaton has 10545 states and 16816 transitions. Word has length 461 [2023-11-06 22:59:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:17,909 INFO L495 AbstractCegarLoop]: Abstraction has 10545 states and 16816 transitions. [2023-11-06 22:59:17,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 10545 states and 16816 transitions. [2023-11-06 22:59:17,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-06 22:59:17,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:17,922 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:17,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:18,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:59:18,130 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:18,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:18,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1990550939, now seen corresponding path program 1 times [2023-11-06 22:59:18,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:18,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600229912] [2023-11-06 22:59:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:18,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:18,209 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:18,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589806950] [2023-11-06 22:59:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:18,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:18,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:18,211 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:18,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:59:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:18,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 1262 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:59:18,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:59:18,967 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:59:18,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:18,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600229912] [2023-11-06 22:59:18,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:18,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589806950] [2023-11-06 22:59:18,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589806950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:18,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:18,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:59:18,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159901369] [2023-11-06 22:59:18,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:18,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:59:18,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:18,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:59:18,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:59:18,972 INFO L87 Difference]: Start difference. First operand 10545 states and 16816 transitions. Second operand has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:21,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:21,405 INFO L93 Difference]: Finished difference Result 35149 states and 55854 transitions. [2023-11-06 22:59:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:59:21,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 461 [2023-11-06 22:59:21,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:21,481 INFO L225 Difference]: With dead ends: 35149 [2023-11-06 22:59:21,482 INFO L226 Difference]: Without dead ends: 23477 [2023-11-06 22:59:21,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:59:21,508 INFO L413 NwaCegarLoop]: 998 mSDtfsCounter, 2214 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2214 SdHoareTripleChecker+Valid, 3519 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:21,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2214 Valid, 3519 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:59:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23477 states. [2023-11-06 22:59:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23477 to 10001. [2023-11-06 22:59:22,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10001 states, 8784 states have (on average 1.5573770491803278) internal successors, (13680), 8792 states have internal predecessors, (13680), 1152 states have call successors, (1152), 64 states have call predecessors, (1152), 64 states have return successors, (1152), 1144 states have call predecessors, (1152), 1152 states have call successors, (1152) [2023-11-06 22:59:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10001 states to 10001 states and 15984 transitions. [2023-11-06 22:59:22,695 INFO L78 Accepts]: Start accepts. Automaton has 10001 states and 15984 transitions. Word has length 461 [2023-11-06 22:59:22,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:22,696 INFO L495 AbstractCegarLoop]: Abstraction has 10001 states and 15984 transitions. [2023-11-06 22:59:22,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:22,696 INFO L276 IsEmpty]: Start isEmpty. Operand 10001 states and 15984 transitions. [2023-11-06 22:59:22,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-06 22:59:22,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:22,704 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:22,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:22,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:59:22,914 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:22,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:22,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1718140135, now seen corresponding path program 1 times [2023-11-06 22:59:22,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:22,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024128716] [2023-11-06 22:59:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:22,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:22,990 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:22,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920490370] [2023-11-06 22:59:22,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:22,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:22,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:22,992 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:23,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:59:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:23,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:59:23,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:59:24,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:59:24,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:24,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024128716] [2023-11-06 22:59:24,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:24,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920490370] [2023-11-06 22:59:24,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920490370] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:24,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:24,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:59:24,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452812935] [2023-11-06 22:59:24,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:24,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:59:24,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:24,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:59:24,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:59:24,488 INFO L87 Difference]: Start difference. First operand 10001 states and 15984 transitions. Second operand has 9 states, 9 states have (on average 17.11111111111111) internal successors, (154), 8 states have internal predecessors, (154), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:27,731 INFO L93 Difference]: Finished difference Result 46709 states and 74449 transitions. [2023-11-06 22:59:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:59:27,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.11111111111111) internal successors, (154), 8 states have internal predecessors, (154), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 461 [2023-11-06 22:59:27,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:27,826 INFO L225 Difference]: With dead ends: 46709 [2023-11-06 22:59:27,826 INFO L226 Difference]: Without dead ends: 36711 [2023-11-06 22:59:27,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:59:27,848 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 1723 mSDsluCounter, 3657 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 4286 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:27,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1723 Valid, 4286 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-06 22:59:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36711 states. [2023-11-06 22:59:29,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36711 to 27093. [2023-11-06 22:59:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27093 states, 24660 states have (on average 1.5776155717761557) internal successors, (38904), 24676 states have internal predecessors, (38904), 2304 states have call successors, (2304), 128 states have call predecessors, (2304), 128 states have return successors, (2304), 2288 states have call predecessors, (2304), 2304 states have call successors, (2304) [2023-11-06 22:59:29,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27093 states to 27093 states and 43512 transitions. [2023-11-06 22:59:29,830 INFO L78 Accepts]: Start accepts. Automaton has 27093 states and 43512 transitions. Word has length 461 [2023-11-06 22:59:29,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:29,831 INFO L495 AbstractCegarLoop]: Abstraction has 27093 states and 43512 transitions. [2023-11-06 22:59:29,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.11111111111111) internal successors, (154), 8 states have internal predecessors, (154), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:29,832 INFO L276 IsEmpty]: Start isEmpty. Operand 27093 states and 43512 transitions. [2023-11-06 22:59:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-06 22:59:29,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:29,845 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:29,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:30,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:59:30,054 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:30,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:30,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1622887003, now seen corresponding path program 1 times [2023-11-06 22:59:30,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:30,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167101366] [2023-11-06 22:59:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:30,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:30,132 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:30,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326543847] [2023-11-06 22:59:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:30,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:30,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:30,134 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:30,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:59:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:30,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:59:31,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3291 proven. 126 refuted. 0 times theorem prover too weak. 4147 trivial. 0 not checked. [2023-11-06 22:59:31,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 57 proven. 126 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-06 22:59:31,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:31,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167101366] [2023-11-06 22:59:31,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:31,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326543847] [2023-11-06 22:59:31,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326543847] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:31,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:59:31,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:59:31,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637879062] [2023-11-06 22:59:31,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:31,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:59:31,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:59:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:59:31,842 INFO L87 Difference]: Start difference. First operand 27093 states and 43512 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) [2023-11-06 22:59:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:33,504 INFO L93 Difference]: Finished difference Result 47327 states and 75677 transitions. [2023-11-06 22:59:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:59:33,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) Word has length 461 [2023-11-06 22:59:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:33,564 INFO L225 Difference]: With dead ends: 47327 [2023-11-06 22:59:33,565 INFO L226 Difference]: Without dead ends: 19841 [2023-11-06 22:59:33,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 914 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:59:33,602 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 318 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:33,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 1049 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:59:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19841 states. [2023-11-06 22:59:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19841 to 14421. [2023-11-06 22:59:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14421 states, 12308 states have (on average 1.5454988625284367) internal successors, (19022), 12308 states have internal predecessors, (19022), 1984 states have call successors, (1984), 128 states have call predecessors, (1984), 128 states have return successors, (1984), 1984 states have call predecessors, (1984), 1984 states have call successors, (1984) [2023-11-06 22:59:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14421 states to 14421 states and 22990 transitions. [2023-11-06 22:59:35,292 INFO L78 Accepts]: Start accepts. Automaton has 14421 states and 22990 transitions. Word has length 461 [2023-11-06 22:59:35,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:35,294 INFO L495 AbstractCegarLoop]: Abstraction has 14421 states and 22990 transitions. [2023-11-06 22:59:35,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) [2023-11-06 22:59:35,294 INFO L276 IsEmpty]: Start isEmpty. Operand 14421 states and 22990 transitions. [2023-11-06 22:59:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-11-06 22:59:35,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:35,306 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:35,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:35,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:59:35,515 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:35,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:35,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1578453683, now seen corresponding path program 1 times [2023-11-06 22:59:35,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:35,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357873824] [2023-11-06 22:59:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:35,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:35,598 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:35,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316469795] [2023-11-06 22:59:35,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:35,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:35,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:35,600 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:35,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:59:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:36,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:59:36,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3463 proven. 120 refuted. 0 times theorem prover too weak. 3981 trivial. 0 not checked. [2023-11-06 22:59:36,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 63 proven. 120 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-06 22:59:37,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:37,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357873824] [2023-11-06 22:59:37,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:37,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316469795] [2023-11-06 22:59:37,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316469795] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:37,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:59:37,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:59:37,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551875032] [2023-11-06 22:59:37,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:37,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:59:37,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:37,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:59:37,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:59:37,093 INFO L87 Difference]: Start difference. First operand 14421 states and 22990 transitions. Second operand has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-06 22:59:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:37,780 INFO L93 Difference]: Finished difference Result 19111 states and 30441 transitions. [2023-11-06 22:59:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:59:37,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) Word has length 462 [2023-11-06 22:59:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:37,792 INFO L225 Difference]: With dead ends: 19111 [2023-11-06 22:59:37,792 INFO L226 Difference]: Without dead ends: 4621 [2023-11-06 22:59:37,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 916 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:59:37,811 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 628 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:37,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 1061 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:59:37,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4621 states. [2023-11-06 22:59:38,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4621 to 4261. [2023-11-06 22:59:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4261 states, 3724 states have (on average 1.546186895810956) internal successors, (5758), 3724 states have internal predecessors, (5758), 496 states have call successors, (496), 40 states have call predecessors, (496), 40 states have return successors, (496), 496 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-06 22:59:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4261 states to 4261 states and 6750 transitions. [2023-11-06 22:59:38,342 INFO L78 Accepts]: Start accepts. Automaton has 4261 states and 6750 transitions. Word has length 462 [2023-11-06 22:59:38,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:38,343 INFO L495 AbstractCegarLoop]: Abstraction has 4261 states and 6750 transitions. [2023-11-06 22:59:38,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-06 22:59:38,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4261 states and 6750 transitions. [2023-11-06 22:59:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-11-06 22:59:38,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:38,351 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:38,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:38,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:59:38,561 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:38,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:38,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1721819915, now seen corresponding path program 1 times [2023-11-06 22:59:38,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:38,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563459277] [2023-11-06 22:59:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:38,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:38,646 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:38,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235035878] [2023-11-06 22:59:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:38,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:38,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:38,648 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:38,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:59:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:39,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:59:39,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:59:39,324 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:59:39,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:39,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563459277] [2023-11-06 22:59:39,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:39,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235035878] [2023-11-06 22:59:39,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235035878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:39,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:39,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:59:39,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858207322] [2023-11-06 22:59:39,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:39,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:59:39,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:39,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:59:39,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:59:39,328 INFO L87 Difference]: Start difference. First operand 4261 states and 6750 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:39,599 INFO L93 Difference]: Finished difference Result 8519 states and 13497 transitions. [2023-11-06 22:59:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:59:39,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 462 [2023-11-06 22:59:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:39,616 INFO L225 Difference]: With dead ends: 8519 [2023-11-06 22:59:39,617 INFO L226 Difference]: Without dead ends: 4261 [2023-11-06 22:59:39,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 459 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 22:59:39,623 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 292 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:39,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 804 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:59:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2023-11-06 22:59:40,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 4261. [2023-11-06 22:59:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4261 states, 3724 states have (on average 1.5397422126745435) internal successors, (5734), 3724 states have internal predecessors, (5734), 496 states have call successors, (496), 40 states have call predecessors, (496), 40 states have return successors, (496), 496 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-06 22:59:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4261 states to 4261 states and 6726 transitions. [2023-11-06 22:59:40,195 INFO L78 Accepts]: Start accepts. Automaton has 4261 states and 6726 transitions. Word has length 462 [2023-11-06 22:59:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:40,196 INFO L495 AbstractCegarLoop]: Abstraction has 4261 states and 6726 transitions. [2023-11-06 22:59:40,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4261 states and 6726 transitions. [2023-11-06 22:59:40,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-11-06 22:59:40,206 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:40,207 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:40,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:40,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:59:40,408 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:40,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1748885517, now seen corresponding path program 1 times [2023-11-06 22:59:40,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:40,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501853902] [2023-11-06 22:59:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:40,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:40,506 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:40,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914474122] [2023-11-06 22:59:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:40,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:40,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:40,508 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:40,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:59:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:41,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:59:41,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:59:42,335 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:59:42,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:42,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501853902] [2023-11-06 22:59:42,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:42,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914474122] [2023-11-06 22:59:42,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914474122] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:42,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:42,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:59:42,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736976482] [2023-11-06 22:59:42,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:42,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:59:42,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:42,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:59:42,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:59:42,340 INFO L87 Difference]: Start difference. First operand 4261 states and 6726 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:43,624 INFO L93 Difference]: Finished difference Result 16939 states and 26751 transitions. [2023-11-06 22:59:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:59:43,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 462 [2023-11-06 22:59:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:43,652 INFO L225 Difference]: With dead ends: 16939 [2023-11-06 22:59:43,652 INFO L226 Difference]: Without dead ends: 12681 [2023-11-06 22:59:43,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:59:43,662 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 741 mSDsluCounter, 1999 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 2561 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:43,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 2561 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:59:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12681 states. [2023-11-06 22:59:44,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12681 to 9365. [2023-11-06 22:59:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9365 states, 8292 states have (on average 1.5446213217559093) internal successors, (12808), 8292 states have internal predecessors, (12808), 992 states have call successors, (992), 80 states have call predecessors, (992), 80 states have return successors, (992), 992 states have call predecessors, (992), 992 states have call successors, (992) [2023-11-06 22:59:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9365 states to 9365 states and 14792 transitions. [2023-11-06 22:59:44,769 INFO L78 Accepts]: Start accepts. Automaton has 9365 states and 14792 transitions. Word has length 462 [2023-11-06 22:59:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:44,770 INFO L495 AbstractCegarLoop]: Abstraction has 9365 states and 14792 transitions. [2023-11-06 22:59:44,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 9365 states and 14792 transitions. [2023-11-06 22:59:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-11-06 22:59:44,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:44,778 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:44,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-06 22:59:44,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:59:44,987 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:44,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:44,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1658858933, now seen corresponding path program 1 times [2023-11-06 22:59:44,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:44,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425894432] [2023-11-06 22:59:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:44,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:45,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:45,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558392479] [2023-11-06 22:59:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:45,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:45,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:45,065 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:45,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:59:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:45,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:59:45,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 4648 proven. 48 refuted. 0 times theorem prover too weak. 2868 trivial. 0 not checked. [2023-11-06 22:59:46,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 135 proven. 48 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-06 22:59:46,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:46,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425894432] [2023-11-06 22:59:46,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:46,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558392479] [2023-11-06 22:59:46,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558392479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:46,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:59:46,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-06 22:59:46,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604146297] [2023-11-06 22:59:46,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:46,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:59:46,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:46,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:59:46,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:59:46,832 INFO L87 Difference]: Start difference. First operand 9365 states and 14792 transitions. Second operand has 14 states, 14 states have (on average 18.714285714285715) internal successors, (262), 14 states have internal predecessors, (262), 5 states have call successors, (91), 3 states have call predecessors, (91), 5 states have return successors, (91), 5 states have call predecessors, (91), 5 states have call successors, (91) [2023-11-06 22:59:48,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:48,438 INFO L93 Difference]: Finished difference Result 24651 states and 38835 transitions. [2023-11-06 22:59:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:59:48,438 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.714285714285715) internal successors, (262), 14 states have internal predecessors, (262), 5 states have call successors, (91), 3 states have call predecessors, (91), 5 states have return successors, (91), 5 states have call predecessors, (91), 5 states have call successors, (91) Word has length 462 [2023-11-06 22:59:48,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:48,463 INFO L225 Difference]: With dead ends: 24651 [2023-11-06 22:59:48,463 INFO L226 Difference]: Without dead ends: 15289 [2023-11-06 22:59:48,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 912 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:59:48,476 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 1738 mSDsluCounter, 2104 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1783 SdHoareTripleChecker+Valid, 2575 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:48,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1783 Valid, 2575 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:59:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15289 states. [2023-11-06 22:59:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15289 to 11009. [2023-11-06 22:59:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11009 states, 9920 states have (on average 1.5491935483870967) internal successors, (15368), 9920 states have internal predecessors, (15368), 992 states have call successors, (992), 96 states have call predecessors, (992), 96 states have return successors, (992), 992 states have call predecessors, (992), 992 states have call successors, (992) [2023-11-06 22:59:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11009 states to 11009 states and 17352 transitions. [2023-11-06 22:59:49,409 INFO L78 Accepts]: Start accepts. Automaton has 11009 states and 17352 transitions. Word has length 462 [2023-11-06 22:59:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:49,411 INFO L495 AbstractCegarLoop]: Abstraction has 11009 states and 17352 transitions. [2023-11-06 22:59:49,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.714285714285715) internal successors, (262), 14 states have internal predecessors, (262), 5 states have call successors, (91), 3 states have call predecessors, (91), 5 states have return successors, (91), 5 states have call predecessors, (91), 5 states have call successors, (91) [2023-11-06 22:59:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11009 states and 17352 transitions. [2023-11-06 22:59:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-11-06 22:59:49,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:49,419 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:49,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:49,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:59:49,628 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:49,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:49,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1493605897, now seen corresponding path program 1 times [2023-11-06 22:59:49,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:49,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890808053] [2023-11-06 22:59:49,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:49,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:49,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:49,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017261685] [2023-11-06 22:59:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:49,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:49,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:49,703 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:49,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:59:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:50,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:59:50,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:59:51,536 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:59:51,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:51,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890808053] [2023-11-06 22:59:51,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:51,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017261685] [2023-11-06 22:59:51,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017261685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:51,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:51,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:59:51,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733598259] [2023-11-06 22:59:51,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:51,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:59:51,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:51,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:59:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:59:51,543 INFO L87 Difference]: Start difference. First operand 11009 states and 17352 transitions. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 7 states have internal predecessors, (155), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:53,824 INFO L93 Difference]: Finished difference Result 35397 states and 56020 transitions. [2023-11-06 22:59:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:59:53,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 7 states have internal predecessors, (155), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 462 [2023-11-06 22:59:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:53,846 INFO L225 Difference]: With dead ends: 35397 [2023-11-06 22:59:53,847 INFO L226 Difference]: Without dead ends: 24391 [2023-11-06 22:59:53,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:59:53,856 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 1439 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:53,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1439 Valid, 1774 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 22:59:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24391 states. [2023-11-06 22:59:54,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24391 to 18609. [2023-11-06 22:59:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18609 states, 17520 states have (on average 1.5641552511415524) internal successors, (27404), 17520 states have internal predecessors, (27404), 992 states have call successors, (992), 96 states have call predecessors, (992), 96 states have return successors, (992), 992 states have call predecessors, (992), 992 states have call successors, (992) [2023-11-06 22:59:54,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18609 states to 18609 states and 29388 transitions. [2023-11-06 22:59:54,631 INFO L78 Accepts]: Start accepts. Automaton has 18609 states and 29388 transitions. Word has length 462 [2023-11-06 22:59:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:54,632 INFO L495 AbstractCegarLoop]: Abstraction has 18609 states and 29388 transitions. [2023-11-06 22:59:54,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 7 states have internal predecessors, (155), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 18609 states and 29388 transitions. [2023-11-06 22:59:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-11-06 22:59:54,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:54,642 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:54,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:54,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:59:54,848 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:54,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:54,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1421219339, now seen corresponding path program 1 times [2023-11-06 22:59:54,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:54,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680923978] [2023-11-06 22:59:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:54,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:54,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:54,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412453799] [2023-11-06 22:59:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:54,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:54,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:54,925 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:54,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:59:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:55,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:59:55,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3787 proven. 102 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2023-11-06 22:59:57,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:59:58,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:58,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680923978] [2023-11-06 22:59:58,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:58,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412453799] [2023-11-06 22:59:58,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412453799] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:58,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:59:58,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2023-11-06 22:59:58,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591496363] [2023-11-06 22:59:58,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:58,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:59:58,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:59:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:59:58,145 INFO L87 Difference]: Start difference. First operand 18609 states and 29388 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:59,065 INFO L93 Difference]: Finished difference Result 47716 states and 75646 transitions. [2023-11-06 22:59:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:59:59,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 462 [2023-11-06 22:59:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:59,111 INFO L225 Difference]: With dead ends: 47716 [2023-11-06 22:59:59,112 INFO L226 Difference]: Without dead ends: 29110 [2023-11-06 22:59:59,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 923 GetRequests, 913 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:59:59,135 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 169 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:59,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 2193 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:59:59,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29110 states. [2023-11-06 22:59:59,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29110 to 18825. [2023-11-06 22:59:59,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18825 states, 17736 states have (on average 1.5613441587731167) internal successors, (27692), 17736 states have internal predecessors, (27692), 992 states have call successors, (992), 96 states have call predecessors, (992), 96 states have return successors, (992), 992 states have call predecessors, (992), 992 states have call successors, (992) [2023-11-06 22:59:59,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18825 states to 18825 states and 29676 transitions. [2023-11-06 22:59:59,900 INFO L78 Accepts]: Start accepts. Automaton has 18825 states and 29676 transitions. Word has length 462 [2023-11-06 22:59:59,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:59,901 INFO L495 AbstractCegarLoop]: Abstraction has 18825 states and 29676 transitions. [2023-11-06 22:59:59,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:59:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 18825 states and 29676 transitions. [2023-11-06 22:59:59,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-06 22:59:59,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:59,912 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:59,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:00,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:00,113 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:00:00,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:00,113 INFO L85 PathProgramCache]: Analyzing trace with hash 190956427, now seen corresponding path program 1 times [2023-11-06 23:00:00,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:00,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471217461] [2023-11-06 23:00:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:00,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:00,200 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:00:00,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090935212] [2023-11-06 23:00:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:00,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:00,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:00,203 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:00,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 23:00:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:00,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:00:00,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 23:00:02,264 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:02,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:02,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471217461] [2023-11-06 23:00:02,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:00:02,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090935212] [2023-11-06 23:00:02,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090935212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:02,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:02,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:00:02,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893802502] [2023-11-06 23:00:02,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:02,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:02,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:02,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:02,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:00:02,269 INFO L87 Difference]: Start difference. First operand 18825 states and 29676 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 23:00:03,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:00:03,639 INFO L93 Difference]: Finished difference Result 50161 states and 78811 transitions. [2023-11-06 23:00:03,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:00:03,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 463 [2023-11-06 23:00:03,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:00:03,679 INFO L225 Difference]: With dead ends: 50161 [2023-11-06 23:00:03,679 INFO L226 Difference]: Without dead ends: 31339 [2023-11-06 23:00:03,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:00:03,697 INFO L413 NwaCegarLoop]: 819 mSDtfsCounter, 608 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:00:03,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 1818 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:00:03,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31339 states. [2023-11-06 23:00:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31339 to 29583. [2023-11-06 23:00:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29583 states, 27950 states have (on average 1.5481932021466904) internal successors, (43272), 27950 states have internal predecessors, (43272), 1488 states have call successors, (1488), 144 states have call predecessors, (1488), 144 states have return successors, (1488), 1488 states have call predecessors, (1488), 1488 states have call successors, (1488) [2023-11-06 23:00:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29583 states to 29583 states and 46248 transitions. [2023-11-06 23:00:04,688 INFO L78 Accepts]: Start accepts. Automaton has 29583 states and 46248 transitions. Word has length 463 [2023-11-06 23:00:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:00:04,689 INFO L495 AbstractCegarLoop]: Abstraction has 29583 states and 46248 transitions. [2023-11-06 23:00:04,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 23:00:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 29583 states and 46248 transitions. [2023-11-06 23:00:04,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-06 23:00:04,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:00:04,698 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:04,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:04,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:04,899 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:00:04,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:04,899 INFO L85 PathProgramCache]: Analyzing trace with hash 562854212, now seen corresponding path program 1 times [2023-11-06 23:00:04,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:04,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668489909] [2023-11-06 23:00:04,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:04,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:04,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:00:04,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977869977] [2023-11-06 23:00:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:04,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:04,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:04,973 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:04,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 23:00:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:05,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:00:05,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 23:00:06,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:06,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:06,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668489909] [2023-11-06 23:00:06,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:00:06,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977869977] [2023-11-06 23:00:06,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977869977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:06,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:06,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:00:06,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384752260] [2023-11-06 23:00:06,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:06,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:06,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:06,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:06,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:00:06,837 INFO L87 Difference]: Start difference. First operand 29583 states and 46248 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 23:00:08,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:00:08,028 INFO L93 Difference]: Finished difference Result 50473 states and 78739 transitions. [2023-11-06 23:00:08,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:00:08,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 463 [2023-11-06 23:00:08,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:00:08,244 INFO L225 Difference]: With dead ends: 50473 [2023-11-06 23:00:08,244 INFO L226 Difference]: Without dead ends: 41593 [2023-11-06 23:00:08,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:00:08,252 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 605 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:00:08,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 1472 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:00:08,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41593 states. [2023-11-06 23:00:09,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41593 to 39301. [2023-11-06 23:00:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39301 states, 37124 states have (on average 1.5414287253528716) internal successors, (57224), 37124 states have internal predecessors, (57224), 1984 states have call successors, (1984), 192 states have call predecessors, (1984), 192 states have return successors, (1984), 1984 states have call predecessors, (1984), 1984 states have call successors, (1984) [2023-11-06 23:00:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39301 states to 39301 states and 61192 transitions. [2023-11-06 23:00:09,567 INFO L78 Accepts]: Start accepts. Automaton has 39301 states and 61192 transitions. Word has length 463 [2023-11-06 23:00:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:00:09,568 INFO L495 AbstractCegarLoop]: Abstraction has 39301 states and 61192 transitions. [2023-11-06 23:00:09,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 23:00:09,568 INFO L276 IsEmpty]: Start isEmpty. Operand 39301 states and 61192 transitions. [2023-11-06 23:00:09,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-06 23:00:09,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:00:09,579 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:09,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-06 23:00:09,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:09,780 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:00:09,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:09,780 INFO L85 PathProgramCache]: Analyzing trace with hash -149094533, now seen corresponding path program 1 times [2023-11-06 23:00:09,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:09,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613645817] [2023-11-06 23:00:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:09,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:09,848 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:00:09,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567739357] [2023-11-06 23:00:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:09,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:09,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:09,851 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:09,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 23:00:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:10,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:00:10,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 23:00:11,852 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:11,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613645817] [2023-11-06 23:00:11,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:00:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567739357] [2023-11-06 23:00:11,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567739357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:11,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:11,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:00:11,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235194148] [2023-11-06 23:00:11,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:11,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:11,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:11,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:11,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:00:11,856 INFO L87 Difference]: Start difference. First operand 39301 states and 61192 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 23:00:13,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:00:13,127 INFO L93 Difference]: Finished difference Result 84857 states and 131966 transitions. [2023-11-06 23:00:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:00:13,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 464 [2023-11-06 23:00:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:00:13,185 INFO L225 Difference]: With dead ends: 84857 [2023-11-06 23:00:13,185 INFO L226 Difference]: Without dead ends: 45559 [2023-11-06 23:00:13,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:00:13,217 INFO L413 NwaCegarLoop]: 468 mSDtfsCounter, 442 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:00:13,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 1388 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:00:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45559 states. [2023-11-06 23:00:14,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45559 to 40323. [2023-11-06 23:00:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40323 states, 38078 states have (on average 1.5410473239140712) internal successors, (58680), 38078 states have internal predecessors, (58680), 2046 states have call successors, (2046), 198 states have call predecessors, (2046), 198 states have return successors, (2046), 2046 states have call predecessors, (2046), 2046 states have call successors, (2046) [2023-11-06 23:00:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40323 states to 40323 states and 62772 transitions. [2023-11-06 23:00:15,072 INFO L78 Accepts]: Start accepts. Automaton has 40323 states and 62772 transitions. Word has length 464 [2023-11-06 23:00:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:00:15,073 INFO L495 AbstractCegarLoop]: Abstraction has 40323 states and 62772 transitions. [2023-11-06 23:00:15,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 23:00:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 40323 states and 62772 transitions. [2023-11-06 23:00:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-06 23:00:15,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:00:15,087 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:15,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-06 23:00:15,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:15,288 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:00:15,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:15,288 INFO L85 PathProgramCache]: Analyzing trace with hash -919828099, now seen corresponding path program 1 times [2023-11-06 23:00:15,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:15,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154364374] [2023-11-06 23:00:15,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:15,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:15,359 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:00:15,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303073515] [2023-11-06 23:00:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:15,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:15,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:15,361 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:15,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 23:00:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:16,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:00:16,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 23:00:17,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:17,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:17,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154364374] [2023-11-06 23:00:17,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:00:17,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303073515] [2023-11-06 23:00:17,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303073515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:17,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:17,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:00:17,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006047139] [2023-11-06 23:00:17,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:17,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:17,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:00:17,255 INFO L87 Difference]: Start difference. First operand 40323 states and 62772 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 23:00:18,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:00:18,644 INFO L93 Difference]: Finished difference Result 82846 states and 128860 transitions. [2023-11-06 23:00:18,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:00:18,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 464 [2023-11-06 23:00:18,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:00:18,912 INFO L225 Difference]: With dead ends: 82846 [2023-11-06 23:00:18,913 INFO L226 Difference]: Without dead ends: 43171 [2023-11-06 23:00:18,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:00:18,927 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 360 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:00:18,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 1522 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:00:18,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43171 states. [2023-11-06 23:00:20,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43171 to 40319. [2023-11-06 23:00:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40319 states, 38074 states have (on average 1.5409991070021536) internal successors, (58672), 38074 states have internal predecessors, (58672), 2046 states have call successors, (2046), 198 states have call predecessors, (2046), 198 states have return successors, (2046), 2046 states have call predecessors, (2046), 2046 states have call successors, (2046) [2023-11-06 23:00:20,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40319 states to 40319 states and 62764 transitions. [2023-11-06 23:00:20,611 INFO L78 Accepts]: Start accepts. Automaton has 40319 states and 62764 transitions. Word has length 464 [2023-11-06 23:00:20,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:00:20,611 INFO L495 AbstractCegarLoop]: Abstraction has 40319 states and 62764 transitions. [2023-11-06 23:00:20,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 23:00:20,612 INFO L276 IsEmpty]: Start isEmpty. Operand 40319 states and 62764 transitions. [2023-11-06 23:00:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-06 23:00:20,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:00:20,623 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:20,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:20,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:20,824 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:00:20,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:20,825 INFO L85 PathProgramCache]: Analyzing trace with hash -789476739, now seen corresponding path program 1 times [2023-11-06 23:00:20,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:20,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13087522] [2023-11-06 23:00:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:20,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:20,907 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:00:20,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232744200] [2023-11-06 23:00:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:20,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:20,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:20,910 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:20,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 23:00:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:21,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:00:21,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 23:00:22,838 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:22,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:22,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13087522] [2023-11-06 23:00:22,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:00:22,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232744200] [2023-11-06 23:00:22,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232744200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:22,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:22,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:00:22,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717064189] [2023-11-06 23:00:22,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:22,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:00:22,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:22,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:00:22,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:00:22,842 INFO L87 Difference]: Start difference. First operand 40319 states and 62764 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 6 states have internal predecessors, (157), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 23:00:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:00:27,186 INFO L93 Difference]: Finished difference Result 151127 states and 235762 transitions. [2023-11-06 23:00:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:00:27,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 6 states have internal predecessors, (157), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 464 [2023-11-06 23:00:27,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:00:27,346 INFO L225 Difference]: With dead ends: 151127 [2023-11-06 23:00:27,346 INFO L226 Difference]: Without dead ends: 111829 [2023-11-06 23:00:27,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:00:27,377 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 1804 mSDsluCounter, 2849 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1804 SdHoareTripleChecker+Valid, 3569 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:00:27,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1804 Valid, 3569 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 23:00:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111829 states. [2023-11-06 23:00:31,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111829 to 97523. [2023-11-06 23:00:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97523 states, 93102 states have (on average 1.5548538162445489) internal successors, (144760), 93102 states have internal predecessors, (144760), 4030 states have call successors, (4030), 390 states have call predecessors, (4030), 390 states have return successors, (4030), 4030 states have call predecessors, (4030), 4030 states have call successors, (4030) [2023-11-06 23:00:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97523 states to 97523 states and 152820 transitions. [2023-11-06 23:00:31,352 INFO L78 Accepts]: Start accepts. Automaton has 97523 states and 152820 transitions. Word has length 464 [2023-11-06 23:00:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:00:31,353 INFO L495 AbstractCegarLoop]: Abstraction has 97523 states and 152820 transitions. [2023-11-06 23:00:31,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 6 states have internal predecessors, (157), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 23:00:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand 97523 states and 152820 transitions. [2023-11-06 23:00:31,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-06 23:00:31,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:00:31,369 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:31,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:31,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:31,580 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:00:31,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:31,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1700052223, now seen corresponding path program 1 times [2023-11-06 23:00:31,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:31,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824320699] [2023-11-06 23:00:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:31,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:31,651 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:00:31,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010487624] [2023-11-06 23:00:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:31,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:31,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:31,655 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:31,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cca829-28c9-40a6-a7ae-261ddc88c99c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 23:00:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:32,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:00:32,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 23:00:34,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:34,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:34,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824320699] [2023-11-06 23:00:34,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:00:34,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010487624] [2023-11-06 23:00:34,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010487624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:34,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:34,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:00:34,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422365120] [2023-11-06 23:00:34,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:34,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:00:34,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:34,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:00:34,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:00:34,285 INFO L87 Difference]: Start difference. First operand 97523 states and 152820 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 23:00:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:00:39,878 INFO L93 Difference]: Finished difference Result 315185 states and 493559 transitions. [2023-11-06 23:00:39,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:00:39,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 464 [2023-11-06 23:00:39,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:00:40,220 INFO L225 Difference]: With dead ends: 315185 [2023-11-06 23:00:40,220 INFO L226 Difference]: Without dead ends: 217923 [2023-11-06 23:00:40,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:00:40,266 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 652 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:00:40,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 1856 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:00:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217923 states.