./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-70.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/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_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-70.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/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_536615cd-c9f5-4299-8bb9-fae7484ceeb3/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 7ce47381267ee67677a133028db906aae8ff01d6ab9cce9bbfb67fc1f629a942 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:35:14,283 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:35:14,358 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:35:14,373 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:35:14,373 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:35:14,414 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:35:14,416 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:35:14,416 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:35:14,418 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:35:14,423 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:35:14,424 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:35:14,425 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:35:14,426 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:35:14,428 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:35:14,429 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:35:14,429 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:35:14,430 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:35:14,430 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:35:14,431 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:35:14,431 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:35:14,431 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:35:14,432 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:35:14,433 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:35:14,433 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:35:14,434 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:35:14,436 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:35:14,436 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:35:14,437 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:35:14,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:14,438 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:35:14,440 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:35:14,440 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:35:14,440 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:35:14,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:35:14,441 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:35:14,441 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:35:14,441 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:35:14,441 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:35:14,442 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:35:14,442 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_536615cd-c9f5-4299-8bb9-fae7484ceeb3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ce47381267ee67677a133028db906aae8ff01d6ab9cce9bbfb67fc1f629a942 [2023-11-19 07:35:14,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:35:14,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:35:14,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:35:14,766 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:35:14,766 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:35:14,768 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-70.i [2023-11-19 07:35:18,108 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:35:18,481 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:35:18,482 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-70.i [2023-11-19 07:35:18,515 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/data/87af60f87/4077a899696e4af2824c2d0815732f1d/FLAG22c2a9757 [2023-11-19 07:35:18,531 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/data/87af60f87/4077a899696e4af2824c2d0815732f1d [2023-11-19 07:35:18,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:35:18,535 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:35:18,537 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:18,538 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:35:18,545 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:35:18,546 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:18" (1/1) ... [2023-11-19 07:35:18,548 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50bb4559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:18, skipping insertion in model container [2023-11-19 07:35:18,548 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:18" (1/1) ... [2023-11-19 07:35:18,628 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:35:18,792 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_536615cd-c9f5-4299-8bb9-fae7484ceeb3/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-70.i[916,929] [2023-11-19 07:35:19,144 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:19,162 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:35:19,175 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_536615cd-c9f5-4299-8bb9-fae7484ceeb3/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-70.i[916,929] [2023-11-19 07:35:19,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:19,389 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:35:19,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:19 WrapperNode [2023-11-19 07:35:19,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:19,391 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:19,392 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:35:19,392 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:35:19,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:19" (1/1) ... [2023-11-19 07:35:19,448 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:19" (1/1) ... [2023-11-19 07:35:19,648 INFO L138 Inliner]: procedures = 26, calls = 73, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 699 [2023-11-19 07:35:19,648 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:19,649 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:35:19,649 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:35:19,650 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:35:19,670 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:19" (1/1) ... [2023-11-19 07:35:19,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:19" (1/1) ... [2023-11-19 07:35:19,701 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:19" (1/1) ... [2023-11-19 07:35:19,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:19" (1/1) ... [2023-11-19 07:35:19,770 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:19" (1/1) ... [2023-11-19 07:35:19,792 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:19" (1/1) ... [2023-11-19 07:35:19,823 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:19" (1/1) ... [2023-11-19 07:35:19,835 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:19" (1/1) ... [2023-11-19 07:35:19,870 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:35:19,872 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:35:19,872 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:35:19,872 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:35:19,873 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:19" (1/1) ... [2023-11-19 07:35:19,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:19,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:19,907 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:35:19,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:35:19,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:35:19,993 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:35:19,993 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:35:19,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:35:19,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:35:19,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:35:20,202 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:35:20,204 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:35:21,710 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:35:21,723 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:35:21,724 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:35:21,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:21 BoogieIcfgContainer [2023-11-19 07:35:21,731 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:35:21,734 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:35:21,734 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:35:21,738 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:35:21,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:35:18" (1/3) ... [2023-11-19 07:35:21,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4b3d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:21, skipping insertion in model container [2023-11-19 07:35:21,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:19" (2/3) ... [2023-11-19 07:35:21,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4b3d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:21, skipping insertion in model container [2023-11-19 07:35:21,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:21" (3/3) ... [2023-11-19 07:35:21,744 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-70.i [2023-11-19 07:35:21,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:35:21,770 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:35:21,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:21,892 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;@380cfd80, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:21,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:35:21,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 271 states, 208 states have (on average 1.5817307692307692) internal successors, (329), 209 states have internal predecessors, (329), 60 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-19 07:35:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-19 07:35:21,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:21,960 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:21,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:21,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:21,971 INFO L85 PathProgramCache]: Analyzing trace with hash 270350749, now seen corresponding path program 1 times [2023-11-19 07:35:21,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:21,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295551387] [2023-11-19 07:35:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:21,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:22,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:22,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295551387] [2023-11-19 07:35:22,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:35:22,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971016403] [2023-11-19 07:35:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:22,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:22,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:22,540 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:22,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:35:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:23,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:35:23,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 6962 trivial. 0 not checked. [2023-11-19 07:35:23,140 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:23,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971016403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:23,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:23,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:35:23,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258788092] [2023-11-19 07:35:23,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:23,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:35:23,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:23,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:35:23,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:35:23,189 INFO L87 Difference]: Start difference. First operand has 271 states, 208 states have (on average 1.5817307692307692) internal successors, (329), 209 states have internal predecessors, (329), 60 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) Second operand has 2 states, 2 states have (on average 68.5) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 2 states have call successors, (60) [2023-11-19 07:35:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:23,252 INFO L93 Difference]: Finished difference Result 533 states and 948 transitions. [2023-11-19 07:35:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:35:23,255 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 68.5) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 2 states have call successors, (60) Word has length 432 [2023-11-19 07:35:23,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:23,268 INFO L225 Difference]: With dead ends: 533 [2023-11-19 07:35:23,268 INFO L226 Difference]: Without dead ends: 265 [2023-11-19 07:35:23,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 431 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 07:35:23,281 INFO L413 NwaCegarLoop]: 437 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, 437 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 07:35:23,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:35:23,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-11-19 07:35:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2023-11-19 07:35:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 203 states have (on average 1.561576354679803) internal successors, (317), 203 states have internal predecessors, (317), 60 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-19 07:35:23,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 437 transitions. [2023-11-19 07:35:23,371 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 437 transitions. Word has length 432 [2023-11-19 07:35:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:23,372 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 437 transitions. [2023-11-19 07:35:23,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 68.5) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 2 states have call successors, (60) [2023-11-19 07:35:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 437 transitions. [2023-11-19 07:35:23,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-19 07:35:23,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:23,385 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:23,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:23,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:35:23,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:23,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1650871445, now seen corresponding path program 1 times [2023-11-19 07:35:23,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:23,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785315107] [2023-11-19 07:35:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:23,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:23,753 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:23,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299864999] [2023-11-19 07:35:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:23,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:23,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:23,755 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:23,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:35:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:24,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:35:24,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-19 07:35:24,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:24,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:24,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785315107] [2023-11-19 07:35:24,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:24,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299864999] [2023-11-19 07:35:24,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299864999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:24,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:24,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:35:24,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452883699] [2023-11-19 07:35:24,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:24,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:24,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:24,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:24,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:24,320 INFO L87 Difference]: Start difference. First operand 265 states and 437 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:24,469 INFO L93 Difference]: Finished difference Result 733 states and 1213 transitions. [2023-11-19 07:35:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:24,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 432 [2023-11-19 07:35:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:24,481 INFO L225 Difference]: With dead ends: 733 [2023-11-19 07:35:24,485 INFO L226 Difference]: Without dead ends: 471 [2023-11-19 07:35:24,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 430 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 07:35:24,493 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 335 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:24,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 847 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:35:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-11-19 07:35:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 468. [2023-11-19 07:35:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 370 states have (on average 1.5810810810810811) internal successors, (585), 371 states have internal predecessors, (585), 95 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-19 07:35:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 775 transitions. [2023-11-19 07:35:24,573 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 775 transitions. Word has length 432 [2023-11-19 07:35:24,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:24,576 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 775 transitions. [2023-11-19 07:35:24,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 775 transitions. [2023-11-19 07:35:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-19 07:35:24,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:24,588 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:24,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:24,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:24,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:24,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:24,804 INFO L85 PathProgramCache]: Analyzing trace with hash -260171113, now seen corresponding path program 1 times [2023-11-19 07:35:24,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:24,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885571376] [2023-11-19 07:35:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:24,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:24,918 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:24,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771024811] [2023-11-19 07:35:24,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:24,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:24,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:24,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:24,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:35:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:25,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:35:25,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-19 07:35:25,450 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:25,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:25,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885571376] [2023-11-19 07:35:25,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:25,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771024811] [2023-11-19 07:35:25,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771024811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:25,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:25,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:35:25,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230634548] [2023-11-19 07:35:25,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:25,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:25,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:25,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:25,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:25,456 INFO L87 Difference]: Start difference. First operand 468 states and 775 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:25,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:25,662 INFO L93 Difference]: Finished difference Result 1368 states and 2263 transitions. [2023-11-19 07:35:25,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 432 [2023-11-19 07:35:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:25,675 INFO L225 Difference]: With dead ends: 1368 [2023-11-19 07:35:25,675 INFO L226 Difference]: Without dead ends: 903 [2023-11-19 07:35:25,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 430 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 07:35:25,679 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 380 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:25,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 872 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:35:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2023-11-19 07:35:25,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 664. [2023-11-19 07:35:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 566 states have (on average 1.627208480565371) internal successors, (921), 567 states have internal predecessors, (921), 95 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-19 07:35:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1111 transitions. [2023-11-19 07:35:25,769 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1111 transitions. Word has length 432 [2023-11-19 07:35:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:25,771 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 1111 transitions. [2023-11-19 07:35:25,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1111 transitions. [2023-11-19 07:35:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-19 07:35:25,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:25,784 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:25,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:25,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:26,000 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:26,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:26,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1646956523, now seen corresponding path program 1 times [2023-11-19 07:35:26,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:26,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531785306] [2023-11-19 07:35:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:26,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:26,103 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:26,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267489056] [2023-11-19 07:35:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:26,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:26,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:26,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:26,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:35:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:26,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:35:26,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-19 07:35:26,649 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:26,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:26,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531785306] [2023-11-19 07:35:26,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:26,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267489056] [2023-11-19 07:35:26,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267489056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:26,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:26,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:35:26,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100915654] [2023-11-19 07:35:26,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:26,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:26,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:26,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:26,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:26,654 INFO L87 Difference]: Start difference. First operand 664 states and 1111 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:26,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:26,791 INFO L93 Difference]: Finished difference Result 1972 states and 3302 transitions. [2023-11-19 07:35:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:26,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 432 [2023-11-19 07:35:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:26,803 INFO L225 Difference]: With dead ends: 1972 [2023-11-19 07:35:26,803 INFO L226 Difference]: Without dead ends: 1311 [2023-11-19 07:35:26,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 430 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 07:35:26,806 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 408 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:26,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 1021 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:35:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2023-11-19 07:35:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 728. [2023-11-19 07:35:26,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 630 states have (on average 1.6365079365079365) internal successors, (1031), 631 states have internal predecessors, (1031), 95 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-19 07:35:26,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1221 transitions. [2023-11-19 07:35:26,877 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1221 transitions. Word has length 432 [2023-11-19 07:35:26,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:26,879 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 1221 transitions. [2023-11-19 07:35:26,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:26,879 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1221 transitions. [2023-11-19 07:35:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-19 07:35:26,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:26,885 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:26,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:27,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-19 07:35:27,099 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:27,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:27,100 INFO L85 PathProgramCache]: Analyzing trace with hash -588348081, now seen corresponding path program 1 times [2023-11-19 07:35:27,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:27,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301230901] [2023-11-19 07:35:27,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:27,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:27,191 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:27,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744134497] [2023-11-19 07:35:27,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:27,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:27,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:27,194 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:27,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:35:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:27,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:35:27,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-19 07:35:27,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:27,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:27,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301230901] [2023-11-19 07:35:27,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:27,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744134497] [2023-11-19 07:35:27,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744134497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:27,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:27,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:35:27,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432599074] [2023-11-19 07:35:27,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:27,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:27,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:27,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:27,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:27,788 INFO L87 Difference]: Start difference. First operand 728 states and 1221 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:27,929 INFO L93 Difference]: Finished difference Result 2166 states and 3633 transitions. [2023-11-19 07:35:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:27,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 432 [2023-11-19 07:35:27,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:27,942 INFO L225 Difference]: With dead ends: 2166 [2023-11-19 07:35:27,942 INFO L226 Difference]: Without dead ends: 1441 [2023-11-19 07:35:27,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 430 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 07:35:27,945 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 414 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:27,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 959 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:35:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2023-11-19 07:35:28,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 840. [2023-11-19 07:35:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 742 states have (on average 1.6455525606469004) internal successors, (1221), 743 states have internal predecessors, (1221), 95 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-19 07:35:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1411 transitions. [2023-11-19 07:35:28,022 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1411 transitions. Word has length 432 [2023-11-19 07:35:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:28,023 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 1411 transitions. [2023-11-19 07:35:28,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1411 transitions. [2023-11-19 07:35:28,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-19 07:35:28,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:28,029 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:28,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:28,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:28,255 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:28,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:28,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1617707379, now seen corresponding path program 1 times [2023-11-19 07:35:28,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:28,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334830519] [2023-11-19 07:35:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:28,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:28,358 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:28,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843781371] [2023-11-19 07:35:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:28,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:28,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:28,360 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:28,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:35:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:28,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:35:28,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-19 07:35:29,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:29,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:29,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334830519] [2023-11-19 07:35:29,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:29,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843781371] [2023-11-19 07:35:29,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843781371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:29,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:29,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:35:29,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690387127] [2023-11-19 07:35:29,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:29,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:29,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:29,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:29,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:29,007 INFO L87 Difference]: Start difference. First operand 840 states and 1411 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:29,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:29,179 INFO L93 Difference]: Finished difference Result 2482 states and 4163 transitions. [2023-11-19 07:35:29,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:29,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 432 [2023-11-19 07:35:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:29,193 INFO L225 Difference]: With dead ends: 2482 [2023-11-19 07:35:29,194 INFO L226 Difference]: Without dead ends: 1645 [2023-11-19 07:35:29,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 430 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 07:35:29,197 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 380 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:29,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 825 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:35:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2023-11-19 07:35:29,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1262. [2023-11-19 07:35:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1164 states have (on average 1.6348797250859106) internal successors, (1903), 1165 states have internal predecessors, (1903), 95 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-19 07:35:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 2093 transitions. [2023-11-19 07:35:29,285 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 2093 transitions. Word has length 432 [2023-11-19 07:35:29,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:29,286 INFO L495 AbstractCegarLoop]: Abstraction has 1262 states and 2093 transitions. [2023-11-19 07:35:29,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:29,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 2093 transitions. [2023-11-19 07:35:29,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-11-19 07:35:29,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:29,294 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:29,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:29,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:29,519 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:29,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:29,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2080779227, now seen corresponding path program 1 times [2023-11-19 07:35:29,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:29,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377535709] [2023-11-19 07:35:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:29,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:29,631 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:29,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502488565] [2023-11-19 07:35:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:29,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:29,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:29,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:29,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:35:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:30,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:35:30,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-19 07:35:30,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:30,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:30,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377535709] [2023-11-19 07:35:30,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:30,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502488565] [2023-11-19 07:35:30,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502488565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:30,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:30,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:35:30,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906377610] [2023-11-19 07:35:30,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:30,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:35:30,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:30,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:35:30,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:35:30,804 INFO L87 Difference]: Start difference. First operand 1262 states and 2093 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:31,799 INFO L93 Difference]: Finished difference Result 7287 states and 12114 transitions. [2023-11-19 07:35:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:35:31,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 433 [2023-11-19 07:35:31,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:31,835 INFO L225 Difference]: With dead ends: 7287 [2023-11-19 07:35:31,835 INFO L226 Difference]: Without dead ends: 6028 [2023-11-19 07:35:31,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:35:31,840 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 2245 mSDsluCounter, 2436 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2245 SdHoareTripleChecker+Valid, 3002 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:31,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2245 Valid, 3002 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:35:31,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2023-11-19 07:35:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 2982. [2023-11-19 07:35:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2703 states have (on average 1.6045135035146134) internal successors, (4337), 2708 states have internal predecessors, (4337), 268 states have call successors, (268), 10 states have call predecessors, (268), 10 states have return successors, (268), 263 states have call predecessors, (268), 268 states have call successors, (268) [2023-11-19 07:35:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 4873 transitions. [2023-11-19 07:35:32,042 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 4873 transitions. Word has length 433 [2023-11-19 07:35:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:32,043 INFO L495 AbstractCegarLoop]: Abstraction has 2982 states and 4873 transitions. [2023-11-19 07:35:32,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:32,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 4873 transitions. [2023-11-19 07:35:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-11-19 07:35:32,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:32,053 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:32,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:32,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:32,275 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:32,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:32,275 INFO L85 PathProgramCache]: Analyzing trace with hash 238108445, now seen corresponding path program 1 times [2023-11-19 07:35:32,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:32,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560355668] [2023-11-19 07:35:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:32,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:32,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:32,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58571956] [2023-11-19 07:35:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:32,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:32,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:32,365 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:32,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:35:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:32,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:35:32,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-19 07:35:33,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:33,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:33,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560355668] [2023-11-19 07:35:33,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:33,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58571956] [2023-11-19 07:35:33,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58571956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:33,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:33,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:35:33,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588726493] [2023-11-19 07:35:33,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:33,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:35:33,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:33,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:35:33,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:35:33,457 INFO L87 Difference]: Start difference. First operand 2982 states and 4873 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:34,512 INFO L93 Difference]: Finished difference Result 16429 states and 27012 transitions. [2023-11-19 07:35:34,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:35:34,513 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 433 [2023-11-19 07:35:34,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:34,602 INFO L225 Difference]: With dead ends: 16429 [2023-11-19 07:35:34,603 INFO L226 Difference]: Without dead ends: 13569 [2023-11-19 07:35:34,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:35:34,611 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 2211 mSDsluCounter, 3137 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2211 SdHoareTripleChecker+Valid, 3778 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:34,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2211 Valid, 3778 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:35:34,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13569 states. [2023-11-19 07:35:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13569 to 6729. [2023-11-19 07:35:34,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6729 states, 6261 states have (on average 1.609647021242613) internal successors, (10078), 6276 states have internal predecessors, (10078), 443 states have call successors, (443), 24 states have call predecessors, (443), 24 states have return successors, (443), 428 states have call predecessors, (443), 443 states have call successors, (443) [2023-11-19 07:35:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 10964 transitions. [2023-11-19 07:35:35,011 INFO L78 Accepts]: Start accepts. Automaton has 6729 states and 10964 transitions. Word has length 433 [2023-11-19 07:35:35,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:35,012 INFO L495 AbstractCegarLoop]: Abstraction has 6729 states and 10964 transitions. [2023-11-19 07:35:35,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 6729 states and 10964 transitions. [2023-11-19 07:35:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-11-19 07:35:35,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:35,032 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:35,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:35,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:35,243 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:35,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1175072197, now seen corresponding path program 1 times [2023-11-19 07:35:35,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:35,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464697519] [2023-11-19 07:35:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:35,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:35,361 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:35,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918582785] [2023-11-19 07:35:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:35,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:35,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:35,363 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:35,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:35:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:35,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:35:35,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-19 07:35:36,514 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:36,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:36,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464697519] [2023-11-19 07:35:36,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:36,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918582785] [2023-11-19 07:35:36,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918582785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:36,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:36,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:35:36,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609414424] [2023-11-19 07:35:36,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:36,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:35:36,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:36,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:35:36,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:35:36,521 INFO L87 Difference]: Start difference. First operand 6729 states and 10964 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:37,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:37,832 INFO L93 Difference]: Finished difference Result 26891 states and 43975 transitions. [2023-11-19 07:35:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:35:37,833 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 433 [2023-11-19 07:35:37,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:37,884 INFO L225 Difference]: With dead ends: 26891 [2023-11-19 07:35:37,884 INFO L226 Difference]: Without dead ends: 20284 [2023-11-19 07:35:37,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:35:37,901 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 2174 mSDsluCounter, 2251 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2174 SdHoareTripleChecker+Valid, 2807 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:37,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2174 Valid, 2807 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [475 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:35:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20284 states. [2023-11-19 07:35:38,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20284 to 7353. [2023-11-19 07:35:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7353 states, 6885 states have (on average 1.6159767610748004) internal successors, (11126), 6900 states have internal predecessors, (11126), 443 states have call successors, (443), 24 states have call predecessors, (443), 24 states have return successors, (443), 428 states have call predecessors, (443), 443 states have call successors, (443) [2023-11-19 07:35:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7353 states to 7353 states and 12012 transitions. [2023-11-19 07:35:38,407 INFO L78 Accepts]: Start accepts. Automaton has 7353 states and 12012 transitions. Word has length 433 [2023-11-19 07:35:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:38,408 INFO L495 AbstractCegarLoop]: Abstraction has 7353 states and 12012 transitions. [2023-11-19 07:35:38,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 7353 states and 12012 transitions. [2023-11-19 07:35:38,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-11-19 07:35:38,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:38,429 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:38,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:38,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:38,653 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:38,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:38,654 INFO L85 PathProgramCache]: Analyzing trace with hash -196735101, now seen corresponding path program 1 times [2023-11-19 07:35:38,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:38,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57643654] [2023-11-19 07:35:38,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:38,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:38,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:38,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464113169] [2023-11-19 07:35:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:38,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:38,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:38,731 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:38,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:35:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:39,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:35:39,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-19 07:35:40,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:40,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:40,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57643654] [2023-11-19 07:35:40,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:40,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464113169] [2023-11-19 07:35:40,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464113169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:40,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:40,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:35:40,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34395086] [2023-11-19 07:35:40,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:40,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:35:40,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:40,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:35:40,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:35:40,710 INFO L87 Difference]: Start difference. First operand 7353 states and 12012 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:41,450 INFO L93 Difference]: Finished difference Result 21102 states and 34579 transitions. [2023-11-19 07:35:41,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:35:41,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 433 [2023-11-19 07:35:41,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:41,490 INFO L225 Difference]: With dead ends: 21102 [2023-11-19 07:35:41,491 INFO L226 Difference]: Without dead ends: 13870 [2023-11-19 07:35:41,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:35:41,509 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 518 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:41,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1686 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:35:41,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13870 states. [2023-11-19 07:35:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13870 to 7352. [2023-11-19 07:35:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7352 states, 6884 states have (on average 1.6159209761766415) internal successors, (11124), 6899 states have internal predecessors, (11124), 443 states have call successors, (443), 24 states have call predecessors, (443), 24 states have return successors, (443), 428 states have call predecessors, (443), 443 states have call successors, (443) [2023-11-19 07:35:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7352 states to 7352 states and 12010 transitions. [2023-11-19 07:35:41,857 INFO L78 Accepts]: Start accepts. Automaton has 7352 states and 12010 transitions. Word has length 433 [2023-11-19 07:35:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:41,858 INFO L495 AbstractCegarLoop]: Abstraction has 7352 states and 12010 transitions. [2023-11-19 07:35:41,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 7352 states and 12010 transitions. [2023-11-19 07:35:41,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-11-19 07:35:41,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:41,904 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:41,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:42,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:42,136 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:42,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:42,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1121710211, now seen corresponding path program 1 times [2023-11-19 07:35:42,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:42,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504483139] [2023-11-19 07:35:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:42,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:42,205 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:42,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131617420] [2023-11-19 07:35:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:42,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:42,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:42,207 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:42,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:35:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:42,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:35:42,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-19 07:35:43,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:43,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:43,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504483139] [2023-11-19 07:35:43,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:43,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131617420] [2023-11-19 07:35:43,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131617420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:43,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:43,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:35:43,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124434190] [2023-11-19 07:35:43,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:43,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:35:43,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:43,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:35:43,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:35:43,141 INFO L87 Difference]: Start difference. First operand 7352 states and 12010 transitions. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:44,449 INFO L93 Difference]: Finished difference Result 19475 states and 31610 transitions. [2023-11-19 07:35:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:35:44,449 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 433 [2023-11-19 07:35:44,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:44,476 INFO L225 Difference]: With dead ends: 19475 [2023-11-19 07:35:44,477 INFO L226 Difference]: Without dead ends: 12244 [2023-11-19 07:35:44,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:35:44,486 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 2636 mSDsluCounter, 2344 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2636 SdHoareTripleChecker+Valid, 2854 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:44,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2636 Valid, 2854 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:35:44,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12244 states. [2023-11-19 07:35:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12244 to 5373. [2023-11-19 07:35:44,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5373 states, 5084 states have (on average 1.5877261998426435) internal successors, (8072), 5089 states have internal predecessors, (8072), 272 states have call successors, (272), 16 states have call predecessors, (272), 16 states have return successors, (272), 267 states have call predecessors, (272), 272 states have call successors, (272) [2023-11-19 07:35:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5373 states to 5373 states and 8616 transitions. [2023-11-19 07:35:44,748 INFO L78 Accepts]: Start accepts. Automaton has 5373 states and 8616 transitions. Word has length 433 [2023-11-19 07:35:44,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:44,749 INFO L495 AbstractCegarLoop]: Abstraction has 5373 states and 8616 transitions. [2023-11-19 07:35:44,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 5373 states and 8616 transitions. [2023-11-19 07:35:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-11-19 07:35:44,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:44,763 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:44,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:44,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:35:44,987 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:44,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:44,988 INFO L85 PathProgramCache]: Analyzing trace with hash 167770053, now seen corresponding path program 1 times [2023-11-19 07:35:44,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:44,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595307572] [2023-11-19 07:35:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:44,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:45,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:45,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558963924] [2023-11-19 07:35:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:45,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:45,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:45,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:45,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:35:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:45,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:35:45,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3293 proven. 114 refuted. 0 times theorem prover too weak. 3673 trivial. 0 not checked. [2023-11-19 07:35:46,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-19 07:35:46,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:46,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595307572] [2023-11-19 07:35:46,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:46,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558963924] [2023-11-19 07:35:46,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558963924] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:46,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:35:46,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:35:46,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573816022] [2023-11-19 07:35:46,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:46,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:35:46,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:46,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:35:46,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:35:46,650 INFO L87 Difference]: Start difference. First operand 5373 states and 8616 transitions. Second operand has 8 states, 8 states have (on average 27.375) internal successors, (219), 8 states have internal predecessors, (219), 3 states have call successors, (98), 2 states have call predecessors, (98), 4 states have return successors, (99), 3 states have call predecessors, (99), 3 states have call successors, (99) [2023-11-19 07:35:47,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:47,252 INFO L93 Difference]: Finished difference Result 10677 states and 17094 transitions. [2023-11-19 07:35:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:35:47,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.375) internal successors, (219), 8 states have internal predecessors, (219), 3 states have call successors, (98), 2 states have call predecessors, (98), 4 states have return successors, (99), 3 states have call predecessors, (99), 3 states have call successors, (99) Word has length 433 [2023-11-19 07:35:47,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:47,266 INFO L225 Difference]: With dead ends: 10677 [2023-11-19 07:35:47,266 INFO L226 Difference]: Without dead ends: 5425 [2023-11-19 07:35:47,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 858 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 07:35:47,275 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 496 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:47,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 961 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:35:47,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5425 states. [2023-11-19 07:35:47,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5425 to 5393. [2023-11-19 07:35:47,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5393 states, 5099 states have (on average 1.5699156697391645) internal successors, (8005), 5104 states have internal predecessors, (8005), 272 states have call successors, (272), 21 states have call predecessors, (272), 21 states have return successors, (272), 267 states have call predecessors, (272), 272 states have call successors, (272) [2023-11-19 07:35:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5393 states to 5393 states and 8549 transitions. [2023-11-19 07:35:47,574 INFO L78 Accepts]: Start accepts. Automaton has 5393 states and 8549 transitions. Word has length 433 [2023-11-19 07:35:47,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:47,575 INFO L495 AbstractCegarLoop]: Abstraction has 5393 states and 8549 transitions. [2023-11-19 07:35:47,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.375) internal successors, (219), 8 states have internal predecessors, (219), 3 states have call successors, (98), 2 states have call predecessors, (98), 4 states have return successors, (99), 3 states have call predecessors, (99), 3 states have call successors, (99) [2023-11-19 07:35:47,576 INFO L276 IsEmpty]: Start isEmpty. Operand 5393 states and 8549 transitions. [2023-11-19 07:35:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-11-19 07:35:47,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:47,593 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:47,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:47,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:35:47,807 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:47,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:47,808 INFO L85 PathProgramCache]: Analyzing trace with hash -326722951, now seen corresponding path program 1 times [2023-11-19 07:35:47,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:47,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652250308] [2023-11-19 07:35:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:47,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:47,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:47,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461991895] [2023-11-19 07:35:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:47,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:47,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:47,901 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:47,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:35:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:48,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:35:48,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 2477 proven. 138 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2023-11-19 07:35:49,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 39 proven. 138 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-19 07:35:49,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:49,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652250308] [2023-11-19 07:35:49,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:49,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461991895] [2023-11-19 07:35:49,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461991895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:49,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:35:49,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-19 07:35:49,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897709548] [2023-11-19 07:35:49,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:49,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:35:49,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:49,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:35:49,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:35:49,976 INFO L87 Difference]: Start difference. First operand 5393 states and 8549 transitions. Second operand has 15 states, 15 states have (on average 12.333333333333334) internal successors, (185), 15 states have internal predecessors, (185), 2 states have call successors, (106), 2 states have call predecessors, (106), 4 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2023-11-19 07:35:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:54,632 INFO L93 Difference]: Finished difference Result 18163 states and 28752 transitions. [2023-11-19 07:35:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-19 07:35:54,633 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 12.333333333333334) internal successors, (185), 15 states have internal predecessors, (185), 2 states have call successors, (106), 2 states have call predecessors, (106), 4 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) Word has length 434 [2023-11-19 07:35:54,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:54,667 INFO L225 Difference]: With dead ends: 18163 [2023-11-19 07:35:54,667 INFO L226 Difference]: Without dead ends: 12895 [2023-11-19 07:35:54,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 860 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1180, Invalid=4672, Unknown=0, NotChecked=0, Total=5852 [2023-11-19 07:35:54,678 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 5389 mSDsluCounter, 3251 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 1103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5417 SdHoareTripleChecker+Valid, 3831 SdHoareTripleChecker+Invalid, 2751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1103 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:54,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5417 Valid, 3831 Invalid, 2751 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1103 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-19 07:35:54,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12895 states. [2023-11-19 07:35:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12895 to 6517. [2023-11-19 07:35:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6517 states, 6153 states have (on average 1.5522509345034943) internal successors, (9551), 6162 states have internal predecessors, (9551), 324 states have call successors, (324), 39 states have call predecessors, (324), 39 states have return successors, (324), 315 states have call predecessors, (324), 324 states have call successors, (324) [2023-11-19 07:35:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6517 states to 6517 states and 10199 transitions. [2023-11-19 07:35:55,057 INFO L78 Accepts]: Start accepts. Automaton has 6517 states and 10199 transitions. Word has length 434 [2023-11-19 07:35:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:55,058 INFO L495 AbstractCegarLoop]: Abstraction has 6517 states and 10199 transitions. [2023-11-19 07:35:55,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.333333333333334) internal successors, (185), 15 states have internal predecessors, (185), 2 states have call successors, (106), 2 states have call predecessors, (106), 4 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2023-11-19 07:35:55,059 INFO L276 IsEmpty]: Start isEmpty. Operand 6517 states and 10199 transitions. [2023-11-19 07:35:55,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-11-19 07:35:55,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:55,077 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:55,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:55,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:35:55,291 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:55,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:55,292 INFO L85 PathProgramCache]: Analyzing trace with hash -339689625, now seen corresponding path program 1 times [2023-11-19 07:35:55,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:55,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508467850] [2023-11-19 07:35:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:55,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:55,381 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:55,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008103982] [2023-11-19 07:35:55,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:55,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:55,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:55,383 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:55,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:35:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:56,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:35:56,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-19 07:35:56,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:56,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:56,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508467850] [2023-11-19 07:35:56,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:56,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008103982] [2023-11-19 07:35:56,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008103982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:56,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:56,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:35:56,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670455284] [2023-11-19 07:35:56,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:56,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:56,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:56,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:56,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:56,160 INFO L87 Difference]: Start difference. First operand 6517 states and 10199 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:56,440 INFO L93 Difference]: Finished difference Result 10725 states and 16701 transitions. [2023-11-19 07:35:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:56,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 434 [2023-11-19 07:35:56,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:56,456 INFO L225 Difference]: With dead ends: 10725 [2023-11-19 07:35:56,456 INFO L226 Difference]: Without dead ends: 4341 [2023-11-19 07:35:56,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 432 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 07:35:56,465 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 199 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:56,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1031 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:35:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4341 states. [2023-11-19 07:35:56,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4341 to 4183. [2023-11-19 07:35:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 3873 states have (on average 1.5194939323521817) internal successors, (5885), 3878 states have internal predecessors, (5885), 276 states have call successors, (276), 33 states have call predecessors, (276), 33 states have return successors, (276), 271 states have call predecessors, (276), 276 states have call successors, (276) [2023-11-19 07:35:56,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 6437 transitions. [2023-11-19 07:35:56,672 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 6437 transitions. Word has length 434 [2023-11-19 07:35:56,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:56,674 INFO L495 AbstractCegarLoop]: Abstraction has 4183 states and 6437 transitions. [2023-11-19 07:35:56,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-19 07:35:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 6437 transitions. [2023-11-19 07:35:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2023-11-19 07:35:56,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:56,686 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:56,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:56,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:56,903 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:56,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:56,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1761640406, now seen corresponding path program 1 times [2023-11-19 07:35:56,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:56,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534357678] [2023-11-19 07:35:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:56,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:56,991 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:56,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762818146] [2023-11-19 07:35:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:56,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:56,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:56,994 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:57,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 07:35:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:57,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:35:57,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 2339 proven. 141 refuted. 0 times theorem prover too weak. 4600 trivial. 0 not checked. [2023-11-19 07:35:58,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 36 proven. 141 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-19 07:35:58,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:58,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534357678] [2023-11-19 07:35:58,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:58,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762818146] [2023-11-19 07:35:58,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762818146] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:58,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:35:58,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:35:58,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423994270] [2023-11-19 07:35:58,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:58,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:35:58,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:58,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:35:58,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:35:58,523 INFO L87 Difference]: Start difference. First operand 4183 states and 6437 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) [2023-11-19 07:35:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:59,124 INFO L93 Difference]: Finished difference Result 6276 states and 9706 transitions. [2023-11-19 07:35:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:35:59,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) Word has length 435 [2023-11-19 07:35:59,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:59,134 INFO L225 Difference]: With dead ends: 6276 [2023-11-19 07:35:59,134 INFO L226 Difference]: Without dead ends: 2226 [2023-11-19 07:35:59,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 862 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:35:59,142 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 517 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:59,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 939 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:35:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2023-11-19 07:35:59,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2202. [2023-11-19 07:35:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2028 states have (on average 1.541913214990138) internal successors, (3127), 2029 states have internal predecessors, (3127), 155 states have call successors, (155), 18 states have call predecessors, (155), 18 states have return successors, (155), 154 states have call predecessors, (155), 155 states have call successors, (155) [2023-11-19 07:35:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 3437 transitions. [2023-11-19 07:35:59,292 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 3437 transitions. Word has length 435 [2023-11-19 07:35:59,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:59,293 INFO L495 AbstractCegarLoop]: Abstraction has 2202 states and 3437 transitions. [2023-11-19 07:35:59,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) [2023-11-19 07:35:59,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 3437 transitions. [2023-11-19 07:35:59,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-19 07:35:59,307 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:59,307 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:59,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:59,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:35:59,531 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:59,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash -147278399, now seen corresponding path program 1 times [2023-11-19 07:35:59,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:59,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341972840] [2023-11-19 07:35:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:59,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:59,615 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:59,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708237627] [2023-11-19 07:35:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:59,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:59,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:59,617 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:59,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536615cd-c9f5-4299-8bb9-fae7484ceeb3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process