./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-91.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-91.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 44a99e37bd4c1789c639eeb1fddddb52ff04b95cd337cf1d9ec2d82c2bdc4500 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:41:52,270 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:41:52,393 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:41:52,405 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:41:52,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:41:52,443 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:41:52,445 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:41:52,446 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:41:52,447 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:41:52,452 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:41:52,453 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:41:52,454 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:41:52,454 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:41:52,456 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:41:52,456 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:41:52,457 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:41:52,457 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:41:52,458 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:41:52,458 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:41:52,458 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:41:52,459 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:41:52,459 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:41:52,460 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:41:52,460 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:41:52,461 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:41:52,461 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:41:52,462 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:41:52,462 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:41:52,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:52,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:41:52,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:41:52,465 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:41:52,465 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:41:52,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:41:52,465 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:41:52,466 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:41:52,466 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:41:52,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:41:52,466 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:41:52,466 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_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44a99e37bd4c1789c639eeb1fddddb52ff04b95cd337cf1d9ec2d82c2bdc4500 [2023-11-19 07:41:52,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:41:52,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:41:52,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:41:52,792 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:41:52,792 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:41:52,794 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-91.i [2023-11-19 07:41:55,909 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:41:56,222 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:41:56,223 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-91.i [2023-11-19 07:41:56,243 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/data/03103096e/04deaaffcf614539b5beaf25e84559ab/FLAGcd03a36a1 [2023-11-19 07:41:56,262 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/data/03103096e/04deaaffcf614539b5beaf25e84559ab [2023-11-19 07:41:56,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:41:56,267 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:41:56,268 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:56,269 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:41:56,275 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:41:56,275 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:56" (1/1) ... [2023-11-19 07:41:56,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa90c30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:56, skipping insertion in model container [2023-11-19 07:41:56,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:56" (1/1) ... [2023-11-19 07:41:56,366 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:41:56,543 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_65ecdf25-c995-4af9-8fb8-a697cd6290be/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-91.i[916,929] [2023-11-19 07:41:56,844 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:56,871 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:41:56,890 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_65ecdf25-c995-4af9-8fb8-a697cd6290be/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-91.i[916,929] [2023-11-19 07:41:57,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:57,103 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:41:57,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:57 WrapperNode [2023-11-19 07:41:57,104 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:57,105 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:57,106 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:41:57,106 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:41:57,117 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:57" (1/1) ... [2023-11-19 07:41:57,153 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:57" (1/1) ... [2023-11-19 07:41:57,333 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 794 [2023-11-19 07:41:57,333 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:57,334 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:41:57,334 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:41:57,334 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:41:57,345 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:57" (1/1) ... [2023-11-19 07:41:57,345 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:57" (1/1) ... [2023-11-19 07:41:57,368 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:57" (1/1) ... [2023-11-19 07:41:57,372 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:57" (1/1) ... [2023-11-19 07:41:57,424 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:57" (1/1) ... [2023-11-19 07:41:57,433 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:57" (1/1) ... [2023-11-19 07:41:57,443 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:57" (1/1) ... [2023-11-19 07:41:57,454 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:57" (1/1) ... [2023-11-19 07:41:57,470 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:41:57,471 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:41:57,472 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:41:57,472 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:41:57,473 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:57" (1/1) ... [2023-11-19 07:41:57,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:57,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:57,505 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:57,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:41:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:41:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:41:57,558 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:41:57,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:41:57,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:41:57,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:41:57,754 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:41:57,756 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:41:59,202 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:41:59,222 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:41:59,223 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:41:59,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:59 BoogieIcfgContainer [2023-11-19 07:41:59,235 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:41:59,240 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:41:59,240 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:41:59,244 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:41:59,245 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:41:56" (1/3) ... [2023-11-19 07:41:59,246 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f1baa7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:59, skipping insertion in model container [2023-11-19 07:41:59,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:57" (2/3) ... [2023-11-19 07:41:59,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f1baa7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:59, skipping insertion in model container [2023-11-19 07:41:59,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:59" (3/3) ... [2023-11-19 07:41:59,249 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-91.i [2023-11-19 07:41:59,270 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:41:59,270 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:41:59,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:41:59,353 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=LoopHeads, 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;@43112ce5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:41:59,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:41:59,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 296 states, 227 states have (on average 1.5947136563876652) internal successors, (362), 228 states have internal predecessors, (362), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-19 07:41:59,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-19 07:41:59,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:59,395 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:59,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:59,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:59,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1990480499, now seen corresponding path program 1 times [2023-11-19 07:41:59,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:59,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152580423] [2023-11-19 07:41:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:59,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:59,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:59,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152580423] [2023-11-19 07:41:59,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:41:59,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355780075] [2023-11-19 07:41:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:59,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:59,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:59,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:59,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:42:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:00,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:42:00,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 8450 trivial. 0 not checked. [2023-11-19 07:42:00,568 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:00,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355780075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:00,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:00,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:42:00,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556270861] [2023-11-19 07:42:00,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:00,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:42:00,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:00,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:42:00,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:42:00,622 INFO L87 Difference]: Start difference. First operand has 296 states, 227 states have (on average 1.5947136563876652) internal successors, (362), 228 states have internal predecessors, (362), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) Second operand has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 2 states have call successors, (66) [2023-11-19 07:42:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:00,697 INFO L93 Difference]: Finished difference Result 584 states and 1046 transitions. [2023-11-19 07:42:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:42:00,700 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 2 states have call successors, (66) Word has length 471 [2023-11-19 07:42:00,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:00,713 INFO L225 Difference]: With dead ends: 584 [2023-11-19 07:42:00,713 INFO L226 Difference]: Without dead ends: 291 [2023-11-19 07:42:00,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:42:00,724 INFO L413 NwaCegarLoop]: 482 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, 482 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 [2023-11-19 07:42:00,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:42:00,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-11-19 07:42:00,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2023-11-19 07:42:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 223 states have (on average 1.5695067264573992) internal successors, (350), 223 states have internal predecessors, (350), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-19 07:42:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 482 transitions. [2023-11-19 07:42:00,826 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 482 transitions. Word has length 471 [2023-11-19 07:42:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:00,826 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 482 transitions. [2023-11-19 07:42:00,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 2 states have call successors, (66) [2023-11-19 07:42:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 482 transitions. [2023-11-19 07:42:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-19 07:42:00,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:00,840 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:00,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:42:01,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:42:01,065 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:01,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:01,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2069632931, now seen corresponding path program 1 times [2023-11-19 07:42:01,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:01,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697276674] [2023-11-19 07:42:01,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:01,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:01,296 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:01,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428964631] [2023-11-19 07:42:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:01,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:01,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:01,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:01,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:42:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:01,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:42:01,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-19 07:42:01,859 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:01,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:01,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697276674] [2023-11-19 07:42:01,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:01,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428964631] [2023-11-19 07:42:01,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428964631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:01,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:01,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:42:01,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415256938] [2023-11-19 07:42:01,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:01,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:01,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:01,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:01,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:01,867 INFO L87 Difference]: Start difference. First operand 291 states and 482 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:02,017 INFO L93 Difference]: Finished difference Result 864 states and 1434 transitions. [2023-11-19 07:42:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:02,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 471 [2023-11-19 07:42:02,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:02,029 INFO L225 Difference]: With dead ends: 864 [2023-11-19 07:42:02,030 INFO L226 Difference]: Without dead ends: 576 [2023-11-19 07:42:02,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:02,036 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 467 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:02,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 935 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:42:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2023-11-19 07:42:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 397. [2023-11-19 07:42:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 329 states have (on average 1.6261398176291793) internal successors, (535), 329 states have internal predecessors, (535), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-19 07:42:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 667 transitions. [2023-11-19 07:42:02,110 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 667 transitions. Word has length 471 [2023-11-19 07:42:02,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:02,117 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 667 transitions. [2023-11-19 07:42:02,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:02,118 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 667 transitions. [2023-11-19 07:42:02,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-19 07:42:02,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:02,135 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:02,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:02,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:02,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:02,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:02,363 INFO L85 PathProgramCache]: Analyzing trace with hash 238447073, now seen corresponding path program 1 times [2023-11-19 07:42:02,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:02,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508407428] [2023-11-19 07:42:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:02,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:02,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:02,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460096771] [2023-11-19 07:42:02,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:02,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:02,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:02,494 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:02,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:42:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:02,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:42:03,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-19 07:42:03,112 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:03,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:03,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508407428] [2023-11-19 07:42:03,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:03,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460096771] [2023-11-19 07:42:03,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460096771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:03,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:03,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:42:03,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751023022] [2023-11-19 07:42:03,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:03,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:03,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:03,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:03,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:03,121 INFO L87 Difference]: Start difference. First operand 397 states and 667 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:03,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:03,259 INFO L93 Difference]: Finished difference Result 1177 states and 1979 transitions. [2023-11-19 07:42:03,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:03,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 471 [2023-11-19 07:42:03,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:03,273 INFO L225 Difference]: With dead ends: 1177 [2023-11-19 07:42:03,273 INFO L226 Difference]: Without dead ends: 783 [2023-11-19 07:42:03,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:03,278 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 462 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:03,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 1108 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:42:03,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2023-11-19 07:42:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 449. [2023-11-19 07:42:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 381 states have (on average 1.6325459317585302) internal successors, (622), 381 states have internal predecessors, (622), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-19 07:42:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 754 transitions. [2023-11-19 07:42:03,367 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 754 transitions. Word has length 471 [2023-11-19 07:42:03,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:03,370 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 754 transitions. [2023-11-19 07:42:03,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:03,371 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 754 transitions. [2023-11-19 07:42:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-19 07:42:03,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:03,386 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:03,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:03,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:03,602 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:03,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:03,603 INFO L85 PathProgramCache]: Analyzing trace with hash -761277023, now seen corresponding path program 1 times [2023-11-19 07:42:03,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:03,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849516710] [2023-11-19 07:42:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:03,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:03,733 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:03,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667480407] [2023-11-19 07:42:03,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:03,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:03,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:03,736 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:03,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:42:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:04,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:42:04,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-19 07:42:04,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:04,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:04,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849516710] [2023-11-19 07:42:04,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:04,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667480407] [2023-11-19 07:42:04,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667480407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:04,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:04,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:42:04,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062172649] [2023-11-19 07:42:04,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:04,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:04,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:04,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:04,352 INFO L87 Difference]: Start difference. First operand 449 states and 754 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:04,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:04,449 INFO L93 Difference]: Finished difference Result 1219 states and 2051 transitions. [2023-11-19 07:42:04,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:04,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 471 [2023-11-19 07:42:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:04,461 INFO L225 Difference]: With dead ends: 1219 [2023-11-19 07:42:04,461 INFO L226 Difference]: Without dead ends: 773 [2023-11-19 07:42:04,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:04,466 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 286 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:04,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1172 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:42:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2023-11-19 07:42:04,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 770. [2023-11-19 07:42:04,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 671 states have (on average 1.639344262295082) internal successors, (1100), 672 states have internal predecessors, (1100), 96 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (96), 95 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-19 07:42:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1292 transitions. [2023-11-19 07:42:04,518 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1292 transitions. Word has length 471 [2023-11-19 07:42:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:04,519 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 1292 transitions. [2023-11-19 07:42:04,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:04,520 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1292 transitions. [2023-11-19 07:42:04,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-19 07:42:04,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:04,532 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:04,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:04,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:04,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:04,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:04,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1651726879, now seen corresponding path program 1 times [2023-11-19 07:42:04,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:04,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635578076] [2023-11-19 07:42:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:04,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:04,834 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:04,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620998034] [2023-11-19 07:42:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:04,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:04,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:04,836 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:04,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:42:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:05,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:42:05,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-19 07:42:05,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:05,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:05,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635578076] [2023-11-19 07:42:05,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:05,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620998034] [2023-11-19 07:42:05,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620998034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:05,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:05,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:42:05,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795839530] [2023-11-19 07:42:05,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:05,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:05,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:05,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:05,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:05,466 INFO L87 Difference]: Start difference. First operand 770 states and 1292 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:05,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:05,612 INFO L93 Difference]: Finished difference Result 2237 states and 3755 transitions. [2023-11-19 07:42:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:05,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 471 [2023-11-19 07:42:05,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:05,625 INFO L225 Difference]: With dead ends: 2237 [2023-11-19 07:42:05,625 INFO L226 Difference]: Without dead ends: 1470 [2023-11-19 07:42:05,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:05,629 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 321 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:05,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1151 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:42:05,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2023-11-19 07:42:05,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1467. [2023-11-19 07:42:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1302 states have (on average 1.6344086021505377) internal successors, (2128), 1305 states have internal predecessors, (2128), 160 states have call successors, (160), 4 states have call predecessors, (160), 4 states have return successors, (160), 157 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-19 07:42:05,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 2448 transitions. [2023-11-19 07:42:05,709 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 2448 transitions. Word has length 471 [2023-11-19 07:42:05,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:05,710 INFO L495 AbstractCegarLoop]: Abstraction has 1467 states and 2448 transitions. [2023-11-19 07:42:05,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 2448 transitions. [2023-11-19 07:42:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-19 07:42:05,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:05,723 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:05,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:05,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:05,946 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:05,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:05,946 INFO L85 PathProgramCache]: Analyzing trace with hash 802253917, now seen corresponding path program 1 times [2023-11-19 07:42:05,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:05,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736583420] [2023-11-19 07:42:05,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:05,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:06,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:06,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546292853] [2023-11-19 07:42:06,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:06,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:06,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:06,046 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:06,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:42:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:06,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:42:06,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-19 07:42:07,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:07,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:07,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736583420] [2023-11-19 07:42:07,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:07,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546292853] [2023-11-19 07:42:07,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546292853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:07,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:07,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-19 07:42:07,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696235496] [2023-11-19 07:42:07,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:07,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:42:07,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:07,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:42:07,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:42:07,548 INFO L87 Difference]: Start difference. First operand 1467 states and 2448 transitions. Second operand has 11 states, 11 states have (on average 13.090909090909092) internal successors, (144), 10 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:11,370 INFO L93 Difference]: Finished difference Result 11845 states and 19664 transitions. [2023-11-19 07:42:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 07:42:11,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.090909090909092) internal successors, (144), 10 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 471 [2023-11-19 07:42:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:11,436 INFO L225 Difference]: With dead ends: 11845 [2023-11-19 07:42:11,436 INFO L226 Difference]: Without dead ends: 10381 [2023-11-19 07:42:11,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2023-11-19 07:42:11,447 INFO L413 NwaCegarLoop]: 962 mSDtfsCounter, 2769 mSDsluCounter, 5091 mSDsCounter, 0 mSdLazyCounter, 2674 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2769 SdHoareTripleChecker+Valid, 6053 SdHoareTripleChecker+Invalid, 2780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:11,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2769 Valid, 6053 Invalid, 2780 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [106 Valid, 2674 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-19 07:42:11,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10381 states. [2023-11-19 07:42:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10381 to 7298. [2023-11-19 07:42:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7298 states, 6627 states have (on average 1.640108646446356) internal successors, (10869), 6652 states have internal predecessors, (10869), 642 states have call successors, (642), 28 states have call predecessors, (642), 28 states have return successors, (642), 617 states have call predecessors, (642), 642 states have call successors, (642) [2023-11-19 07:42:11,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7298 states to 7298 states and 12153 transitions. [2023-11-19 07:42:11,980 INFO L78 Accepts]: Start accepts. Automaton has 7298 states and 12153 transitions. Word has length 471 [2023-11-19 07:42:11,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:11,981 INFO L495 AbstractCegarLoop]: Abstraction has 7298 states and 12153 transitions. [2023-11-19 07:42:11,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.090909090909092) internal successors, (144), 10 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:11,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7298 states and 12153 transitions. [2023-11-19 07:42:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-19 07:42:11,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:11,995 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:12,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:12,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:42:12,206 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:12,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:12,206 INFO L85 PathProgramCache]: Analyzing trace with hash 321173659, now seen corresponding path program 1 times [2023-11-19 07:42:12,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:12,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599477743] [2023-11-19 07:42:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:12,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:12,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:12,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039481723] [2023-11-19 07:42:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:12,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:12,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:12,305 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:12,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:42:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:12,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:42:12,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 2375 proven. 30 refuted. 0 times theorem prover too weak. 6175 trivial. 0 not checked. [2023-11-19 07:42:13,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 165 proven. 30 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-11-19 07:42:13,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:13,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599477743] [2023-11-19 07:42:13,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:13,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039481723] [2023-11-19 07:42:13,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039481723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:13,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:13,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:42:13,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667973307] [2023-11-19 07:42:13,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:13,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:42:13,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:13,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:42:13,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:42:13,494 INFO L87 Difference]: Start difference. First operand 7298 states and 12153 transitions. Second operand has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-19 07:42:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:14,217 INFO L93 Difference]: Finished difference Result 14637 states and 24344 transitions. [2023-11-19 07:42:14,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:42:14,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 471 [2023-11-19 07:42:14,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:14,270 INFO L225 Difference]: With dead ends: 14637 [2023-11-19 07:42:14,270 INFO L226 Difference]: Without dead ends: 7342 [2023-11-19 07:42:14,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:42:14,287 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 592 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:14,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 1077 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:42:14,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7342 states. [2023-11-19 07:42:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7342 to 7310. [2023-11-19 07:42:14,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7310 states, 6636 states have (on average 1.630801687763713) internal successors, (10822), 6661 states have internal predecessors, (10822), 642 states have call successors, (642), 31 states have call predecessors, (642), 31 states have return successors, (642), 617 states have call predecessors, (642), 642 states have call successors, (642) [2023-11-19 07:42:14,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7310 states to 7310 states and 12106 transitions. [2023-11-19 07:42:14,743 INFO L78 Accepts]: Start accepts. Automaton has 7310 states and 12106 transitions. Word has length 471 [2023-11-19 07:42:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:14,744 INFO L495 AbstractCegarLoop]: Abstraction has 7310 states and 12106 transitions. [2023-11-19 07:42:14,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-19 07:42:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 7310 states and 12106 transitions. [2023-11-19 07:42:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2023-11-19 07:42:14,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:14,758 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:14,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:14,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:42:14,986 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:14,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:14,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1781325798, now seen corresponding path program 1 times [2023-11-19 07:42:14,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:14,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570528566] [2023-11-19 07:42:14,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:14,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:15,074 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:15,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996030944] [2023-11-19 07:42:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:15,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:15,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:15,079 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:15,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:42:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:15,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:42:15,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-19 07:42:17,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:17,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:17,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570528566] [2023-11-19 07:42:17,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:17,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996030944] [2023-11-19 07:42:17,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996030944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:17,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:17,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:42:17,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117187726] [2023-11-19 07:42:17,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:17,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:42:17,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:17,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:42:17,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:42:17,189 INFO L87 Difference]: Start difference. First operand 7310 states and 12106 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:18,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:18,028 INFO L93 Difference]: Finished difference Result 21085 states and 34827 transitions. [2023-11-19 07:42:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:42:18,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 472 [2023-11-19 07:42:18,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:18,102 INFO L225 Difference]: With dead ends: 21085 [2023-11-19 07:42:18,102 INFO L226 Difference]: Without dead ends: 13778 [2023-11-19 07:42:18,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:42:18,119 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 812 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:18,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 1950 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:42:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13778 states. [2023-11-19 07:42:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13778 to 13630. [2023-11-19 07:42:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13630 states, 12614 states have (on average 1.6226415094339623) internal successors, (20468), 12649 states have internal predecessors, (20468), 970 states have call successors, (970), 45 states have call predecessors, (970), 45 states have return successors, (970), 935 states have call predecessors, (970), 970 states have call successors, (970) [2023-11-19 07:42:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13630 states to 13630 states and 22408 transitions. [2023-11-19 07:42:18,897 INFO L78 Accepts]: Start accepts. Automaton has 13630 states and 22408 transitions. Word has length 472 [2023-11-19 07:42:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:18,897 INFO L495 AbstractCegarLoop]: Abstraction has 13630 states and 22408 transitions. [2023-11-19 07:42:18,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 13630 states and 22408 transitions. [2023-11-19 07:42:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-19 07:42:18,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:18,915 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:18,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-19 07:42:19,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:19,134 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:19,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:19,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2039378434, now seen corresponding path program 1 times [2023-11-19 07:42:19,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:19,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763968280] [2023-11-19 07:42:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:19,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:19,288 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:19,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776874772] [2023-11-19 07:42:19,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:19,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:19,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:19,290 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:19,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:42:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:19,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:42:19,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-19 07:42:21,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:21,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:21,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763968280] [2023-11-19 07:42:21,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:21,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776874772] [2023-11-19 07:42:21,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776874772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:21,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:21,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:42:21,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538958045] [2023-11-19 07:42:21,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:21,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:42:21,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:21,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:42:21,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:42:21,312 INFO L87 Difference]: Start difference. First operand 13630 states and 22408 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:22,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:22,011 INFO L93 Difference]: Finished difference Result 32939 states and 54021 transitions. [2023-11-19 07:42:22,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:42:22,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 473 [2023-11-19 07:42:22,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:22,066 INFO L225 Difference]: With dead ends: 32939 [2023-11-19 07:42:22,066 INFO L226 Difference]: Without dead ends: 19312 [2023-11-19 07:42:22,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:42:22,095 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 391 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:22,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1388 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:42:22,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19312 states. [2023-11-19 07:42:22,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19312 to 13746. [2023-11-19 07:42:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13746 states, 12662 states have (on average 1.6202811562154478) internal successors, (20516), 12697 states have internal predecessors, (20516), 1036 states have call successors, (1036), 47 states have call predecessors, (1036), 47 states have return successors, (1036), 1001 states have call predecessors, (1036), 1036 states have call successors, (1036) [2023-11-19 07:42:23,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13746 states to 13746 states and 22588 transitions. [2023-11-19 07:42:23,143 INFO L78 Accepts]: Start accepts. Automaton has 13746 states and 22588 transitions. Word has length 473 [2023-11-19 07:42:23,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:23,146 INFO L495 AbstractCegarLoop]: Abstraction has 13746 states and 22588 transitions. [2023-11-19 07:42:23,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:23,147 INFO L276 IsEmpty]: Start isEmpty. Operand 13746 states and 22588 transitions. [2023-11-19 07:42:23,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-19 07:42:23,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:23,172 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:23,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:23,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:23,394 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:23,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:23,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1008337536, now seen corresponding path program 1 times [2023-11-19 07:42:23,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:23,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566307658] [2023-11-19 07:42:23,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:23,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:23,473 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:23,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042565118] [2023-11-19 07:42:23,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:23,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:23,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:23,475 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:23,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:42:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:23,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:42:23,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-19 07:42:24,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:24,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:24,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566307658] [2023-11-19 07:42:24,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:24,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042565118] [2023-11-19 07:42:24,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042565118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:24,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:24,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:42:24,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423598959] [2023-11-19 07:42:24,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:24,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:42:24,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:24,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:42:24,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:42:24,185 INFO L87 Difference]: Start difference. First operand 13746 states and 22588 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:25,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:25,081 INFO L93 Difference]: Finished difference Result 28480 states and 46804 transitions. [2023-11-19 07:42:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:42:25,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 473 [2023-11-19 07:42:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:25,120 INFO L225 Difference]: With dead ends: 28480 [2023-11-19 07:42:25,120 INFO L226 Difference]: Without dead ends: 14853 [2023-11-19 07:42:25,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:42:25,142 INFO L413 NwaCegarLoop]: 906 mSDtfsCounter, 742 mSDsluCounter, 1922 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:25,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 2828 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:42:25,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14853 states. [2023-11-19 07:42:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14853 to 11610. [2023-11-19 07:42:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11610 states, 10710 states have (on average 1.6103641456582634) internal successors, (17247), 10735 states have internal predecessors, (17247), 848 states have call successors, (848), 51 states have call predecessors, (848), 51 states have return successors, (848), 823 states have call predecessors, (848), 848 states have call successors, (848) [2023-11-19 07:42:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11610 states to 11610 states and 18943 transitions. [2023-11-19 07:42:25,715 INFO L78 Accepts]: Start accepts. Automaton has 11610 states and 18943 transitions. Word has length 473 [2023-11-19 07:42:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:25,716 INFO L495 AbstractCegarLoop]: Abstraction has 11610 states and 18943 transitions. [2023-11-19 07:42:25,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 11610 states and 18943 transitions. [2023-11-19 07:42:25,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-19 07:42:25,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:25,729 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:25,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:25,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:42:25,958 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:25,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1329072984, now seen corresponding path program 1 times [2023-11-19 07:42:25,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:25,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813532288] [2023-11-19 07:42:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:25,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:26,043 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:26,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614321663] [2023-11-19 07:42:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:26,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:26,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:26,045 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:26,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:42:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:26,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:42:26,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-19 07:42:26,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:26,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:26,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813532288] [2023-11-19 07:42:26,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:26,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614321663] [2023-11-19 07:42:26,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614321663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:26,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:26,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:42:26,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758258925] [2023-11-19 07:42:26,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:26,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:42:26,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:26,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:42:26,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:42:26,701 INFO L87 Difference]: Start difference. First operand 11610 states and 18943 transitions. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:28,369 INFO L93 Difference]: Finished difference Result 27709 states and 45244 transitions. [2023-11-19 07:42:28,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:42:28,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 474 [2023-11-19 07:42:28,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:28,415 INFO L225 Difference]: With dead ends: 27709 [2023-11-19 07:42:28,415 INFO L226 Difference]: Without dead ends: 20743 [2023-11-19 07:42:28,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:42:28,432 INFO L413 NwaCegarLoop]: 870 mSDtfsCounter, 1421 mSDsluCounter, 4235 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 5105 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:28,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1421 Valid, 5105 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 07:42:28,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20743 states. [2023-11-19 07:42:29,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20743 to 17100. [2023-11-19 07:42:29,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17100 states, 16037 states have (on average 1.619629606534888) internal successors, (25974), 16073 states have internal predecessors, (25974), 996 states have call successors, (996), 66 states have call predecessors, (996), 66 states have return successors, (996), 960 states have call predecessors, (996), 996 states have call successors, (996) [2023-11-19 07:42:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17100 states to 17100 states and 27966 transitions. [2023-11-19 07:42:29,334 INFO L78 Accepts]: Start accepts. Automaton has 17100 states and 27966 transitions. Word has length 474 [2023-11-19 07:42:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:29,336 INFO L495 AbstractCegarLoop]: Abstraction has 17100 states and 27966 transitions. [2023-11-19 07:42:29,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-19 07:42:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand 17100 states and 27966 transitions. [2023-11-19 07:42:29,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-19 07:42:29,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:29,363 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:29,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:29,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:29,578 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:29,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:29,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1177518364, now seen corresponding path program 1 times [2023-11-19 07:42:29,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:29,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504531320] [2023-11-19 07:42:29,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:29,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:29,681 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:29,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977574326] [2023-11-19 07:42:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:29,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:29,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:29,684 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:29,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:42:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:30,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:42:30,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 3779 proven. 3 refuted. 0 times theorem prover too weak. 4798 trivial. 0 not checked. [2023-11-19 07:42:31,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 192 proven. 3 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-11-19 07:42:32,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:32,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504531320] [2023-11-19 07:42:32,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:32,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977574326] [2023-11-19 07:42:32,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977574326] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:32,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:32,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-19 07:42:32,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402399289] [2023-11-19 07:42:32,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:32,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:42:32,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:32,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:42:32,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:42:32,064 INFO L87 Difference]: Start difference. First operand 17100 states and 27966 transitions. Second operand has 14 states, 14 states have (on average 15.142857142857142) internal successors, (212), 14 states have internal predecessors, (212), 6 states have call successors, (132), 4 states have call predecessors, (132), 6 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) [2023-11-19 07:42:34,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:34,649 INFO L93 Difference]: Finished difference Result 57307 states and 93683 transitions. [2023-11-19 07:42:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:42:34,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 15.142857142857142) internal successors, (212), 14 states have internal predecessors, (212), 6 states have call successors, (132), 4 states have call predecessors, (132), 6 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) Word has length 474 [2023-11-19 07:42:34,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:34,713 INFO L225 Difference]: With dead ends: 57307 [2023-11-19 07:42:34,713 INFO L226 Difference]: Without dead ends: 40334 [2023-11-19 07:42:34,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 936 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:42:34,727 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 1940 mSDsluCounter, 3484 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 3853 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:34,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1959 Valid, 3853 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 1640 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-19 07:42:34,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40334 states. [2023-11-19 07:42:35,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40334 to 17120. [2023-11-19 07:42:35,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17120 states, 16056 states have (on average 1.6196437468858993) internal successors, (26005), 16092 states have internal predecessors, (26005), 996 states have call successors, (996), 67 states have call predecessors, (996), 67 states have return successors, (996), 960 states have call predecessors, (996), 996 states have call successors, (996) [2023-11-19 07:42:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17120 states to 17120 states and 27997 transitions. [2023-11-19 07:42:35,670 INFO L78 Accepts]: Start accepts. Automaton has 17120 states and 27997 transitions. Word has length 474 [2023-11-19 07:42:35,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:35,671 INFO L495 AbstractCegarLoop]: Abstraction has 17120 states and 27997 transitions. [2023-11-19 07:42:35,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.142857142857142) internal successors, (212), 14 states have internal predecessors, (212), 6 states have call successors, (132), 4 states have call predecessors, (132), 6 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) [2023-11-19 07:42:35,672 INFO L276 IsEmpty]: Start isEmpty. Operand 17120 states and 27997 transitions. [2023-11-19 07:42:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-19 07:42:35,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:35,691 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:35,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:35,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:35,919 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:35,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:35,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2145932667, now seen corresponding path program 1 times [2023-11-19 07:42:35,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:35,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758565223] [2023-11-19 07:42:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:35,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:36,004 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:36,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059160983] [2023-11-19 07:42:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:36,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:36,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:36,006 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:36,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65ecdf25-c995-4af9-8fb8-a697cd6290be/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:42:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:36,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 1251 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:42:36,577 INFO L285 TraceCheckSpWp]: Computing forward predicates...