./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-86.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/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_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-86.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/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_d2f258f0-8826-431b-9dde-5106535daf19/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 c3ee8afe098f9cee5b6405d2c58537794155bf2d3eb94d980df01b95a4a7b9e4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:26:14,057 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:26:14,172 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:26:14,180 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:26:14,181 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:26:14,219 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:26:14,220 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:26:14,221 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:26:14,222 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:26:14,227 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:26:14,228 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:26:14,229 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:26:14,229 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:26:14,231 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:26:14,232 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:26:14,232 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:26:14,233 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:26:14,233 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:26:14,233 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:26:14,234 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:26:14,234 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:26:14,235 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:26:14,236 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:26:14,237 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:26:14,238 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:26:14,239 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:26:14,239 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:26:14,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:26:14,240 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:26:14,241 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:26:14,242 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:26:14,243 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:26:14,243 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:26:14,243 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:26:14,243 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:26:14,244 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:26:14,244 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:26:14,244 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:26:14,245 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:26:14,245 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_d2f258f0-8826-431b-9dde-5106535daf19/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3ee8afe098f9cee5b6405d2c58537794155bf2d3eb94d980df01b95a4a7b9e4 [2023-11-06 22:26:14,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:26:14,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:26:14,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:26:14,601 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:26:14,602 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:26:14,603 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-86.i [2023-11-06 22:26:17,866 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:26:18,154 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:26:18,155 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-86.i [2023-11-06 22:26:18,177 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/data/3a8584b35/4475b1623579460b81776547daf0faa1/FLAGbe42553bc [2023-11-06 22:26:18,197 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/data/3a8584b35/4475b1623579460b81776547daf0faa1 [2023-11-06 22:26:18,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:26:18,206 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:26:18,212 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:26:18,212 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:26:18,218 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:26:18,218 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:18" (1/1) ... [2023-11-06 22:26:18,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31e6828e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:18, skipping insertion in model container [2023-11-06 22:26:18,220 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:18" (1/1) ... [2023-11-06 22:26:18,285 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:26:18,484 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_d2f258f0-8826-431b-9dde-5106535daf19/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-86.i[916,929] [2023-11-06 22:26:18,684 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:26:18,715 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:26:18,730 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_d2f258f0-8826-431b-9dde-5106535daf19/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-86.i[916,929] [2023-11-06 22:26:18,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:26:18,833 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:26:18,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:18 WrapperNode [2023-11-06 22:26:18,834 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:26:18,835 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:26:18,835 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:26:18,836 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:26:18,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:18" (1/1) ... [2023-11-06 22:26:18,878 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:18" (1/1) ... [2023-11-06 22:26:18,980 INFO L138 Inliner]: procedures = 26, calls = 82, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 551 [2023-11-06 22:26:18,980 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:26:18,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:26:18,981 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:26:18,982 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:26:18,993 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:18" (1/1) ... [2023-11-06 22:26:18,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:18" (1/1) ... [2023-11-06 22:26:19,017 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:18" (1/1) ... [2023-11-06 22:26:19,017 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:18" (1/1) ... [2023-11-06 22:26:19,064 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:18" (1/1) ... [2023-11-06 22:26:19,092 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:18" (1/1) ... [2023-11-06 22:26:19,098 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:18" (1/1) ... [2023-11-06 22:26:19,106 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:18" (1/1) ... [2023-11-06 22:26:19,117 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:26:19,119 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:26:19,119 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:26:19,119 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:26:19,121 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:18" (1/1) ... [2023-11-06 22:26:19,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:26:19,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:19,157 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:26:19,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:26:19,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:26:19,232 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:26:19,232 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:26:19,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:26:19,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:26:19,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:26:19,384 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:26:19,386 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:26:20,343 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:26:20,353 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:26:20,353 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:26:20,356 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:20 BoogieIcfgContainer [2023-11-06 22:26:20,356 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:26:20,359 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:26:20,359 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:26:20,363 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:26:20,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:26:18" (1/3) ... [2023-11-06 22:26:20,364 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122ce988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:20, skipping insertion in model container [2023-11-06 22:26:20,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:18" (2/3) ... [2023-11-06 22:26:20,365 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122ce988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:20, skipping insertion in model container [2023-11-06 22:26:20,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:20" (3/3) ... [2023-11-06 22:26:20,366 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-86.i [2023-11-06 22:26:20,389 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:26:20,389 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:26:20,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:26:20,461 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;@70b11867, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:26:20,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:26:20,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 213 states, 141 states have (on average 1.6028368794326242) internal successors, (226), 142 states have internal predecessors, (226), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-06 22:26:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-06 22:26:20,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:20,512 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:20,513 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:20,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:20,519 INFO L85 PathProgramCache]: Analyzing trace with hash -44109841, now seen corresponding path program 1 times [2023-11-06 22:26:20,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:20,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2858278] [2023-11-06 22:26:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:20,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:20,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:20,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2858278] [2023-11-06 22:26:20,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:26:20,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820976616] [2023-11-06 22:26:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:20,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:20,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:20,924 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:20,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:26:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:21,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:26:21,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 9248 trivial. 0 not checked. [2023-11-06 22:26:21,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:21,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820976616] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:21,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:21,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:26:21,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959340100] [2023-11-06 22:26:21,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:21,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:26:21,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:21,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:26:21,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:26:21,545 INFO L87 Difference]: Start difference. First operand has 213 states, 141 states have (on average 1.6028368794326242) internal successors, (226), 142 states have internal predecessors, (226), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) Second operand has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-06 22:26:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:21,610 INFO L93 Difference]: Finished difference Result 418 states and 789 transitions. [2023-11-06 22:26:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:26:21,616 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) Word has length 441 [2023-11-06 22:26:21,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:21,628 INFO L225 Difference]: With dead ends: 418 [2023-11-06 22:26:21,631 INFO L226 Difference]: Without dead ends: 208 [2023-11-06 22:26:21,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 440 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 22:26:21,648 INFO L413 NwaCegarLoop]: 352 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, 352 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 22:26:21,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:26:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-06 22:26:21,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2023-11-06 22:26:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 137 states have (on average 1.562043795620438) internal successors, (214), 137 states have internal predecessors, (214), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-06 22:26:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 352 transitions. [2023-11-06 22:26:21,727 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 352 transitions. Word has length 441 [2023-11-06 22:26:21,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:21,728 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 352 transitions. [2023-11-06 22:26:21,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-06 22:26:21,728 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 352 transitions. [2023-11-06 22:26:21,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-06 22:26:21,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:21,743 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:21,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:21,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:26:21,951 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:21,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:21,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2139685707, now seen corresponding path program 1 times [2023-11-06 22:26:21,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:21,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413701835] [2023-11-06 22:26:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:21,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:22,128 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:22,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509049220] [2023-11-06 22:26:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:22,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:22,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:22,142 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:22,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:26:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:22,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:26:22,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:26:22,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:22,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:22,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413701835] [2023-11-06 22:26:22,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:22,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509049220] [2023-11-06 22:26:22,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509049220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:22,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:22,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:26:22,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301229706] [2023-11-06 22:26:22,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:22,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:22,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:22,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:22,768 INFO L87 Difference]: Start difference. First operand 208 states and 352 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:26:22,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:22,867 INFO L93 Difference]: Finished difference Result 532 states and 908 transitions. [2023-11-06 22:26:22,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:22,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 441 [2023-11-06 22:26:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:22,875 INFO L225 Difference]: With dead ends: 532 [2023-11-06 22:26:22,875 INFO L226 Difference]: Without dead ends: 327 [2023-11-06 22:26:22,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 439 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 22:26:22,878 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 199 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:22,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 863 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:26:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-11-06 22:26:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 324. [2023-11-06 22:26:22,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 237 states have (on average 1.6329113924050633) internal successors, (387), 238 states have internal predecessors, (387), 84 states have call successors, (84), 2 states have call predecessors, (84), 2 states have return successors, (84), 83 states have call predecessors, (84), 84 states have call successors, (84) [2023-11-06 22:26:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 555 transitions. [2023-11-06 22:26:22,934 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 555 transitions. Word has length 441 [2023-11-06 22:26:22,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:22,936 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 555 transitions. [2023-11-06 22:26:22,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:26:22,937 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 555 transitions. [2023-11-06 22:26:22,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-06 22:26:22,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:22,949 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:22,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:23,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:23,157 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:23,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:23,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1263666701, now seen corresponding path program 1 times [2023-11-06 22:26:23,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:23,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633347518] [2023-11-06 22:26:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:23,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:23,298 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:23,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788195819] [2023-11-06 22:26:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:23,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:23,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:23,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:23,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:26:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:23,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:26:23,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:26:23,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:23,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:23,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633347518] [2023-11-06 22:26:23,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:23,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788195819] [2023-11-06 22:26:23,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788195819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:23,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:23,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:26:23,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183238394] [2023-11-06 22:26:23,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:23,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:23,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:23,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:23,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:23,752 INFO L87 Difference]: Start difference. First operand 324 states and 555 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:26:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:23,852 INFO L93 Difference]: Finished difference Result 960 states and 1647 transitions. [2023-11-06 22:26:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:23,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 441 [2023-11-06 22:26:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:23,863 INFO L225 Difference]: With dead ends: 960 [2023-11-06 22:26:23,863 INFO L226 Difference]: Without dead ends: 639 [2023-11-06 22:26:23,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 439 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 22:26:23,866 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 319 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:23,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 927 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:26:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2023-11-06 22:26:23,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 637. [2023-11-06 22:26:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 464 states have (on average 1.6077586206896552) internal successors, (746), 466 states have internal predecessors, (746), 168 states have call successors, (168), 4 states have call predecessors, (168), 4 states have return successors, (168), 166 states have call predecessors, (168), 168 states have call successors, (168) [2023-11-06 22:26:23,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1082 transitions. [2023-11-06 22:26:23,972 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1082 transitions. Word has length 441 [2023-11-06 22:26:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:23,975 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 1082 transitions. [2023-11-06 22:26:23,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:26:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1082 transitions. [2023-11-06 22:26:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-06 22:26:23,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:23,980 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:23,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:24,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:24,189 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:24,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:24,189 INFO L85 PathProgramCache]: Analyzing trace with hash -651787853, now seen corresponding path program 1 times [2023-11-06 22:26:24,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:24,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173214578] [2023-11-06 22:26:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:24,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:24,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:24,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582100292] [2023-11-06 22:26:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:24,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:24,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:24,294 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:24,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:26:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:24,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:26:24,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:26:25,407 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:25,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:25,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173214578] [2023-11-06 22:26:25,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:25,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582100292] [2023-11-06 22:26:25,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582100292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:25,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:25,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:26:25,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454319694] [2023-11-06 22:26:25,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:25,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:26:25,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:25,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:26:25,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:26:25,411 INFO L87 Difference]: Start difference. First operand 637 states and 1082 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:26:25,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:25,917 INFO L93 Difference]: Finished difference Result 1691 states and 2888 transitions. [2023-11-06 22:26:25,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:26:25,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 441 [2023-11-06 22:26:25,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:25,927 INFO L225 Difference]: With dead ends: 1691 [2023-11-06 22:26:25,928 INFO L226 Difference]: Without dead ends: 1057 [2023-11-06 22:26:25,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 437 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 22:26:25,931 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 331 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:25,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1239 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:26:25,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2023-11-06 22:26:26,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 983. [2023-11-06 22:26:26,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 740 states have (on average 1.645945945945946) internal successors, (1218), 742 states have internal predecessors, (1218), 237 states have call successors, (237), 5 states have call predecessors, (237), 5 states have return successors, (237), 235 states have call predecessors, (237), 237 states have call successors, (237) [2023-11-06 22:26:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1692 transitions. [2023-11-06 22:26:26,090 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1692 transitions. Word has length 441 [2023-11-06 22:26:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:26,091 INFO L495 AbstractCegarLoop]: Abstraction has 983 states and 1692 transitions. [2023-11-06 22:26:26,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:26:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1692 transitions. [2023-11-06 22:26:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-06 22:26:26,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:26,096 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:26,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:26,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:26,310 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:26,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:26,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1662905103, now seen corresponding path program 1 times [2023-11-06 22:26:26,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:26,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242887609] [2023-11-06 22:26:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:26,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:26,394 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:26,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039859587] [2023-11-06 22:26:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:26,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:26,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:26,396 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:26,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:26:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:26,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:26:26,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4754 proven. 105 refuted. 0 times theorem prover too weak. 4525 trivial. 0 not checked. [2023-11-06 22:26:27,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 99 proven. 105 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-06 22:26:27,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:27,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242887609] [2023-11-06 22:26:27,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:27,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039859587] [2023-11-06 22:26:27,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039859587] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:27,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:26:27,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:26:27,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280726179] [2023-11-06 22:26:27,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:27,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:26:27,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:27,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:26:27,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:26:27,513 INFO L87 Difference]: Start difference. First operand 983 states and 1692 transitions. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-11-06 22:26:28,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:28,033 INFO L93 Difference]: Finished difference Result 1673 states and 2846 transitions. [2023-11-06 22:26:28,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:26:28,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) Word has length 441 [2023-11-06 22:26:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:28,042 INFO L225 Difference]: With dead ends: 1673 [2023-11-06 22:26:28,043 INFO L226 Difference]: Without dead ends: 985 [2023-11-06 22:26:28,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 874 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 22:26:28,077 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 336 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:28,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 639 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:26:28,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2023-11-06 22:26:28,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 975. [2023-11-06 22:26:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 729 states have (on average 1.6227709190672153) internal successors, (1183), 731 states have internal predecessors, (1183), 237 states have call successors, (237), 8 states have call predecessors, (237), 8 states have return successors, (237), 235 states have call predecessors, (237), 237 states have call successors, (237) [2023-11-06 22:26:28,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1657 transitions. [2023-11-06 22:26:28,195 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1657 transitions. Word has length 441 [2023-11-06 22:26:28,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:28,197 INFO L495 AbstractCegarLoop]: Abstraction has 975 states and 1657 transitions. [2023-11-06 22:26:28,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-11-06 22:26:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1657 transitions. [2023-11-06 22:26:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-06 22:26:28,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:28,203 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:28,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:28,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:28,411 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:28,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1793747555, now seen corresponding path program 1 times [2023-11-06 22:26:28,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:28,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508691421] [2023-11-06 22:26:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:28,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:28,492 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:28,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388123593] [2023-11-06 22:26:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:28,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:28,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:28,494 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:28,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:26:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:28,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:26:28,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 5408 proven. 84 refuted. 0 times theorem prover too weak. 3892 trivial. 0 not checked. [2023-11-06 22:26:29,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 120 proven. 84 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-06 22:26:30,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:30,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508691421] [2023-11-06 22:26:30,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:30,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388123593] [2023-11-06 22:26:30,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388123593] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:30,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:26:30,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-06 22:26:30,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642958859] [2023-11-06 22:26:30,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:30,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:26:30,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:26:30,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:26:30,330 INFO L87 Difference]: Start difference. First operand 975 states and 1657 transitions. Second operand has 18 states, 18 states have (on average 8.444444444444445) internal successors, (152), 18 states have internal predecessors, (152), 5 states have call successors, (97), 3 states have call predecessors, (97), 5 states have return successors, (98), 5 states have call predecessors, (98), 5 states have call successors, (98) [2023-11-06 22:26:41,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:41,683 INFO L93 Difference]: Finished difference Result 11592 states and 19389 transitions. [2023-11-06 22:26:41,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-11-06 22:26:41,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.444444444444445) internal successors, (152), 18 states have internal predecessors, (152), 5 states have call successors, (97), 3 states have call predecessors, (97), 5 states have return successors, (98), 5 states have call predecessors, (98), 5 states have call successors, (98) Word has length 441 [2023-11-06 22:26:41,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:41,771 INFO L225 Difference]: With dead ends: 11592 [2023-11-06 22:26:41,771 INFO L226 Difference]: Without dead ends: 10868 [2023-11-06 22:26:41,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 883 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5273 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3127, Invalid=11393, Unknown=0, NotChecked=0, Total=14520 [2023-11-06 22:26:41,787 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 4659 mSDsluCounter, 4551 mSDsCounter, 0 mSdLazyCounter, 4314 mSolverCounterSat, 2169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4728 SdHoareTripleChecker+Valid, 4973 SdHoareTripleChecker+Invalid, 6483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2169 IncrementalHoareTripleChecker+Valid, 4314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:41,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4728 Valid, 4973 Invalid, 6483 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2169 Valid, 4314 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-11-06 22:26:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10868 states. [2023-11-06 22:26:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10868 to 6449. [2023-11-06 22:26:42,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6449 states, 5214 states have (on average 1.6595703874184886) internal successors, (8653), 5250 states have internal predecessors, (8653), 1163 states have call successors, (1163), 71 states have call predecessors, (1163), 71 states have return successors, (1163), 1127 states have call predecessors, (1163), 1163 states have call successors, (1163) [2023-11-06 22:26:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6449 states to 6449 states and 10979 transitions. [2023-11-06 22:26:42,706 INFO L78 Accepts]: Start accepts. Automaton has 6449 states and 10979 transitions. Word has length 441 [2023-11-06 22:26:42,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:42,707 INFO L495 AbstractCegarLoop]: Abstraction has 6449 states and 10979 transitions. [2023-11-06 22:26:42,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.444444444444445) internal successors, (152), 18 states have internal predecessors, (152), 5 states have call successors, (97), 3 states have call predecessors, (97), 5 states have return successors, (98), 5 states have call predecessors, (98), 5 states have call successors, (98) [2023-11-06 22:26:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 6449 states and 10979 transitions. [2023-11-06 22:26:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-06 22:26:42,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:42,717 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:42,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:42,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:42,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:42,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:42,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1799619867, now seen corresponding path program 1 times [2023-11-06 22:26:42,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:42,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433051461] [2023-11-06 22:26:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:42,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:43,003 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:43,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777900233] [2023-11-06 22:26:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:43,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:43,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:43,005 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:43,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:26:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:43,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:26:43,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 1898 proven. 21 refuted. 0 times theorem prover too weak. 7465 trivial. 0 not checked. [2023-11-06 22:26:44,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:45,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:45,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433051461] [2023-11-06 22:26:45,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:45,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777900233] [2023-11-06 22:26:45,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777900233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:45,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:26:45,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-11-06 22:26:45,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105063315] [2023-11-06 22:26:45,282 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:45,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:26:45,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:45,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:26:45,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:26:45,285 INFO L87 Difference]: Start difference. First operand 6449 states and 10979 transitions. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 6 states have internal predecessors, (105), 2 states have call successors, (69), 2 states have call predecessors, (69), 3 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-06 22:26:47,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:47,168 INFO L93 Difference]: Finished difference Result 16941 states and 28549 transitions. [2023-11-06 22:26:47,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:26:47,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 6 states have internal predecessors, (105), 2 states have call successors, (69), 2 states have call predecessors, (69), 3 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 441 [2023-11-06 22:26:47,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:47,245 INFO L225 Difference]: With dead ends: 16941 [2023-11-06 22:26:47,246 INFO L226 Difference]: Without dead ends: 12063 [2023-11-06 22:26:47,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:26:47,261 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 349 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:47,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 1426 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:26:47,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12063 states. [2023-11-06 22:26:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12063 to 11957. [2023-11-06 22:26:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11957 states, 9559 states have (on average 1.6448373260801339) internal successors, (15723), 9631 states have internal predecessors, (15723), 2257 states have call successors, (2257), 140 states have call predecessors, (2257), 140 states have return successors, (2257), 2185 states have call predecessors, (2257), 2257 states have call successors, (2257) [2023-11-06 22:26:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11957 states to 11957 states and 20237 transitions. [2023-11-06 22:26:48,770 INFO L78 Accepts]: Start accepts. Automaton has 11957 states and 20237 transitions. Word has length 441 [2023-11-06 22:26:48,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:48,772 INFO L495 AbstractCegarLoop]: Abstraction has 11957 states and 20237 transitions. [2023-11-06 22:26:48,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 6 states have internal predecessors, (105), 2 states have call successors, (69), 2 states have call predecessors, (69), 3 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-06 22:26:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 11957 states and 20237 transitions. [2023-11-06 22:26:48,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-11-06 22:26:48,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:48,783 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:48,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:48,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:48,992 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:48,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:48,992 INFO L85 PathProgramCache]: Analyzing trace with hash -17998817, now seen corresponding path program 1 times [2023-11-06 22:26:48,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:48,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124937638] [2023-11-06 22:26:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:48,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:49,068 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:49,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191625899] [2023-11-06 22:26:49,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:49,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:49,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:49,070 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:49,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:26:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:49,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:26:49,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 5043 proven. 231 refuted. 0 times theorem prover too weak. 4110 trivial. 0 not checked. [2023-11-06 22:26:50,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 93 proven. 111 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-06 22:26:51,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:51,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124937638] [2023-11-06 22:26:51,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:51,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191625899] [2023-11-06 22:26:51,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191625899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:51,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:26:51,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-11-06 22:26:51,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725565353] [2023-11-06 22:26:51,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:51,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:26:51,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:26:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:26:51,163 INFO L87 Difference]: Start difference. First operand 11957 states and 20237 transitions. Second operand has 13 states, 13 states have (on average 12.692307692307692) internal successors, (165), 13 states have internal predecessors, (165), 4 states have call successors, (110), 3 states have call predecessors, (110), 6 states have return successors, (111), 4 states have call predecessors, (111), 4 states have call successors, (111) [2023-11-06 22:26:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:56,128 INFO L93 Difference]: Finished difference Result 44726 states and 74209 transitions. [2023-11-06 22:26:56,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 22:26:56,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.692307692307692) internal successors, (165), 13 states have internal predecessors, (165), 4 states have call successors, (110), 3 states have call predecessors, (110), 6 states have return successors, (111), 4 states have call predecessors, (111), 4 states have call successors, (111) Word has length 442 [2023-11-06 22:26:56,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:56,239 INFO L225 Difference]: With dead ends: 44726 [2023-11-06 22:26:56,239 INFO L226 Difference]: Without dead ends: 32973 [2023-11-06 22:26:56,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 873 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=642, Invalid=1908, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 22:26:56,270 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 1016 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:56,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 1531 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 22:26:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32973 states. [2023-11-06 22:27:00,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32973 to 31283. [2023-11-06 22:27:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31283 states, 24606 states have (on average 1.5796147281150938) internal successors, (38868), 24798 states have internal predecessors, (38868), 6089 states have call successors, (6089), 587 states have call predecessors, (6089), 587 states have return successors, (6089), 5897 states have call predecessors, (6089), 6089 states have call successors, (6089) [2023-11-06 22:27:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31283 states to 31283 states and 51046 transitions. [2023-11-06 22:27:00,425 INFO L78 Accepts]: Start accepts. Automaton has 31283 states and 51046 transitions. Word has length 442 [2023-11-06 22:27:00,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:27:00,426 INFO L495 AbstractCegarLoop]: Abstraction has 31283 states and 51046 transitions. [2023-11-06 22:27:00,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.692307692307692) internal successors, (165), 13 states have internal predecessors, (165), 4 states have call successors, (110), 3 states have call predecessors, (110), 6 states have return successors, (111), 4 states have call predecessors, (111), 4 states have call successors, (111) [2023-11-06 22:27:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 31283 states and 51046 transitions. [2023-11-06 22:27:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-11-06 22:27:00,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:27:00,442 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:00,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:00,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:00,649 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:27:00,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:00,650 INFO L85 PathProgramCache]: Analyzing trace with hash 256760797, now seen corresponding path program 1 times [2023-11-06 22:27:00,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:00,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353247037] [2023-11-06 22:27:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:00,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:00,709 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:27:00,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441924031] [2023-11-06 22:27:00,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:00,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:00,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:00,711 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:00,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:27:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:01,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:27:01,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 1898 proven. 21 refuted. 0 times theorem prover too weak. 7465 trivial. 0 not checked. [2023-11-06 22:27:04,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:25,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:25,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353247037] [2023-11-06 22:27:25,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:27:25,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441924031] [2023-11-06 22:27:25,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441924031] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:25,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:27:25,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-11-06 22:27:25,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296832966] [2023-11-06 22:27:25,504 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:25,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:27:25,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:25,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:27:25,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:27:25,506 INFO L87 Difference]: Start difference. First operand 31283 states and 51046 transitions. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 2 states have call successors, (69), 2 states have call predecessors, (69), 3 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-06 22:27:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:27:29,306 INFO L93 Difference]: Finished difference Result 54225 states and 87252 transitions. [2023-11-06 22:27:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:27:29,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 2 states have call successors, (69), 2 states have call predecessors, (69), 3 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 442 [2023-11-06 22:27:29,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:27:29,469 INFO L225 Difference]: With dead ends: 54225 [2023-11-06 22:27:29,469 INFO L226 Difference]: Without dead ends: 40397 [2023-11-06 22:27:29,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:27:29,532 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 534 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:27:29,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 1495 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:27:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40397 states. [2023-11-06 22:27:33,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40397 to 39451. [2023-11-06 22:27:33,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39451 states, 30375 states have (on average 1.5592427983539094) internal successors, (47362), 30621 states have internal predecessors, (47362), 8193 states have call successors, (8193), 882 states have call predecessors, (8193), 882 states have return successors, (8193), 7947 states have call predecessors, (8193), 8193 states have call successors, (8193) [2023-11-06 22:27:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39451 states to 39451 states and 63748 transitions. [2023-11-06 22:27:33,682 INFO L78 Accepts]: Start accepts. Automaton has 39451 states and 63748 transitions. Word has length 442 [2023-11-06 22:27:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:27:33,684 INFO L495 AbstractCegarLoop]: Abstraction has 39451 states and 63748 transitions. [2023-11-06 22:27:33,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 2 states have call successors, (69), 2 states have call predecessors, (69), 3 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-06 22:27:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 39451 states and 63748 transitions. [2023-11-06 22:27:33,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-11-06 22:27:33,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:27:33,702 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:33,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:33,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:33,910 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:27:33,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:33,911 INFO L85 PathProgramCache]: Analyzing trace with hash -882726277, now seen corresponding path program 1 times [2023-11-06 22:27:33,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:33,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92217688] [2023-11-06 22:27:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:33,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:33,975 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:27:33,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526893058] [2023-11-06 22:27:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:33,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:33,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:33,977 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:34,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:27:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:34,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:27:34,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4380 proven. 72 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2023-11-06 22:27:34,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 132 proven. 72 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-06 22:27:35,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:35,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92217688] [2023-11-06 22:27:35,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:27:35,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526893058] [2023-11-06 22:27:35,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526893058] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:35,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:27:35,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-06 22:27:35,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655597618] [2023-11-06 22:27:35,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:35,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:27:35,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:27:35,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:27:35,139 INFO L87 Difference]: Start difference. First operand 39451 states and 63748 transitions. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 2 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) [2023-11-06 22:27:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:27:38,342 INFO L93 Difference]: Finished difference Result 59702 states and 96549 transitions. [2023-11-06 22:27:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:27:38,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 2 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) Word has length 442 [2023-11-06 22:27:38,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:27:38,407 INFO L225 Difference]: With dead ends: 59702 [2023-11-06 22:27:38,407 INFO L226 Difference]: Without dead ends: 20720 [2023-11-06 22:27:38,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 874 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:27:38,470 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 759 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:27:38,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 764 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:27:38,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20720 states. [2023-11-06 22:27:41,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20720 to 20248. [2023-11-06 22:27:41,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20248 states, 15631 states have (on average 1.500735717484486) internal successors, (23458), 15754 states have internal predecessors, (23458), 4131 states have call successors, (4131), 485 states have call predecessors, (4131), 485 states have return successors, (4131), 4008 states have call predecessors, (4131), 4131 states have call successors, (4131) [2023-11-06 22:27:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20248 states to 20248 states and 31720 transitions. [2023-11-06 22:27:41,195 INFO L78 Accepts]: Start accepts. Automaton has 20248 states and 31720 transitions. Word has length 442 [2023-11-06 22:27:41,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:27:41,196 INFO L495 AbstractCegarLoop]: Abstraction has 20248 states and 31720 transitions. [2023-11-06 22:27:41,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 2 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) [2023-11-06 22:27:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 20248 states and 31720 transitions. [2023-11-06 22:27:41,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-11-06 22:27:41,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:27:41,207 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:41,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:41,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:27:41,420 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:27:41,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:41,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1376671838, now seen corresponding path program 1 times [2023-11-06 22:27:41,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:41,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409657222] [2023-11-06 22:27:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:41,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:41,478 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:27:41,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106003934] [2023-11-06 22:27:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:41,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:41,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:41,480 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:41,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:27:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:41,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:27:41,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:27:41,889 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:27:41,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:41,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409657222] [2023-11-06 22:27:41,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:27:41,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106003934] [2023-11-06 22:27:41,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106003934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:41,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:27:41,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:27:41,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049435109] [2023-11-06 22:27:41,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:41,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:27:41,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:41,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:27:41,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:27:41,893 INFO L87 Difference]: Start difference. First operand 20248 states and 31720 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:27:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:27:43,801 INFO L93 Difference]: Finished difference Result 39512 states and 61886 transitions. [2023-11-06 22:27:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:27:43,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 444 [2023-11-06 22:27:43,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:27:43,857 INFO L225 Difference]: With dead ends: 39512 [2023-11-06 22:27:43,857 INFO L226 Difference]: Without dead ends: 20404 [2023-11-06 22:27:43,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 442 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 22:27:43,888 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 0 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:27:43,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 660 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:27:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20404 states. [2023-11-06 22:27:46,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20404 to 20386. [2023-11-06 22:27:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20386 states, 15769 states have (on average 1.49635360517471) internal successors, (23596), 15892 states have internal predecessors, (23596), 4131 states have call successors, (4131), 485 states have call predecessors, (4131), 485 states have return successors, (4131), 4008 states have call predecessors, (4131), 4131 states have call successors, (4131) [2023-11-06 22:27:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20386 states to 20386 states and 31858 transitions. [2023-11-06 22:27:46,104 INFO L78 Accepts]: Start accepts. Automaton has 20386 states and 31858 transitions. Word has length 444 [2023-11-06 22:27:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:27:46,105 INFO L495 AbstractCegarLoop]: Abstraction has 20386 states and 31858 transitions. [2023-11-06 22:27:46,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:27:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 20386 states and 31858 transitions. [2023-11-06 22:27:46,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2023-11-06 22:27:46,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:27:46,114 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:46,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:46,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:27:46,314 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:27:46,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:46,315 INFO L85 PathProgramCache]: Analyzing trace with hash -898265218, now seen corresponding path program 1 times [2023-11-06 22:27:46,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:46,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314483790] [2023-11-06 22:27:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:46,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:46,377 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:27:46,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545792145] [2023-11-06 22:27:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:46,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:46,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:46,379 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:46,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f258f0-8826-431b-9dde-5106535daf19/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:27:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:46,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:27:46,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 6456 proven. 390 refuted. 0 times theorem prover too weak. 2538 trivial. 0 not checked. [2023-11-06 22:27:51,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:28:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 306 proven. 297 refuted. 0 times theorem prover too weak. 8781 trivial. 0 not checked. [2023-11-06 22:28:47,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:28:47,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314483790] [2023-11-06 22:28:47,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:28:47,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545792145] [2023-11-06 22:28:47,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545792145] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:28:47,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:28:47,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2023-11-06 22:28:47,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136265520] [2023-11-06 22:28:47,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:28:47,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 22:28:47,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:28:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 22:28:47,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:28:47,399 INFO L87 Difference]: Start difference. First operand 20386 states and 31858 transitions. Second operand has 36 states, 35 states have (on average 5.628571428571429) internal successors, (197), 33 states have internal predecessors, (197), 9 states have call successors, (119), 6 states have call predecessors, (119), 11 states have return successors, (119), 9 states have call predecessors, (119), 9 states have call successors, (119)