./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-75.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-75.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39440d444684353bf21e24f176d5fedee371419507f0ad109966d3b62ac38d18 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:30:35,810 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:30:35,881 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:30:35,888 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:30:35,888 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:30:35,922 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:30:35,927 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:30:35,927 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:30:35,928 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:30:35,930 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:30:35,931 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:30:35,932 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:30:35,932 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:30:35,933 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:30:35,934 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:30:35,934 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:30:35,934 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:30:35,935 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:30:35,935 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:30:35,936 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:30:35,936 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:30:35,943 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:30:35,944 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:30:35,944 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:30:35,945 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:30:35,945 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:30:35,946 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:30:35,946 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:30:35,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:30:35,947 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:30:35,949 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:30:35,949 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:30:35,950 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:30:35,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:30:35,950 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:30:35,951 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:30:35,951 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:30:35,951 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:30:35,951 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:30:35,952 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_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39440d444684353bf21e24f176d5fedee371419507f0ad109966d3b62ac38d18 [2023-11-06 22:30:36,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:30:36,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:30:36,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:30:36,302 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:30:36,303 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:30:36,305 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-75.i [2023-11-06 22:30:39,517 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:30:39,831 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:30:39,832 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-75.i [2023-11-06 22:30:39,849 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/data/74a10b9cd/9e71f42bd31748738928bf5330fd7792/FLAGcf0d3f3d7 [2023-11-06 22:30:39,868 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/data/74a10b9cd/9e71f42bd31748738928bf5330fd7792 [2023-11-06 22:30:39,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:30:39,873 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:30:39,875 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:30:39,875 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:30:39,886 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:30:39,887 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:39" (1/1) ... [2023-11-06 22:30:39,890 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d7282e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:39, skipping insertion in model container [2023-11-06 22:30:39,891 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:39" (1/1) ... [2023-11-06 22:30:39,994 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:30:40,134 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_ac4a323d-c054-44b9-9672-cdf2c702fba6/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-75.i[916,929] [2023-11-06 22:30:40,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:30:40,546 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:30:40,565 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_ac4a323d-c054-44b9-9672-cdf2c702fba6/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-75.i[916,929] [2023-11-06 22:30:40,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:30:40,850 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:30:40,850 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40 WrapperNode [2023-11-06 22:30:40,850 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:30:40,852 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:30:40,852 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:30:40,853 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:30:40,862 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2023-11-06 22:30:40,904 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2023-11-06 22:30:41,041 INFO L138 Inliner]: procedures = 26, calls = 89, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 716 [2023-11-06 22:30:41,041 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:30:41,042 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:30:41,042 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:30:41,043 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:30:41,052 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2023-11-06 22:30:41,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2023-11-06 22:30:41,068 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2023-11-06 22:30:41,069 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2023-11-06 22:30:41,112 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2023-11-06 22:30:41,119 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2023-11-06 22:30:41,132 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2023-11-06 22:30:41,146 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2023-11-06 22:30:41,168 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:30:41,169 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:30:41,169 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:30:41,169 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:30:41,171 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2023-11-06 22:30:41,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:30:41,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:41,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:30:41,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:30:41,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:30:41,257 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:30:41,257 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:30:41,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:30:41,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:30:41,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:30:41,445 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:30:41,447 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:30:42,774 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:30:42,795 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:30:42,795 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:30:42,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:42 BoogieIcfgContainer [2023-11-06 22:30:42,799 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:30:42,804 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:30:42,804 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:30:42,808 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:30:42,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:30:39" (1/3) ... [2023-11-06 22:30:42,809 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73fce59b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:42, skipping insertion in model container [2023-11-06 22:30:42,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (2/3) ... [2023-11-06 22:30:42,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73fce59b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:42, skipping insertion in model container [2023-11-06 22:30:42,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:42" (3/3) ... [2023-11-06 22:30:42,812 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-75.i [2023-11-06 22:30:42,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:30:42,832 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:30:42,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:30:42,909 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6fbcb02e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:30:42,909 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:30:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 287 states, 208 states have (on average 1.5288461538461537) internal successors, (318), 209 states have internal predecessors, (318), 76 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-06 22:30:42,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-11-06 22:30:42,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:42,952 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:42,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:42,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:42,958 INFO L85 PathProgramCache]: Analyzing trace with hash -141600771, now seen corresponding path program 1 times [2023-11-06 22:30:42,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:42,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674753320] [2023-11-06 22:30:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:42,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:43,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:43,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674753320] [2023-11-06 22:30:43,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:30:43,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555695105] [2023-11-06 22:30:43,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:43,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:43,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:43,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:43,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:30:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:44,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:30:44,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 11250 trivial. 0 not checked. [2023-11-06 22:30:44,150 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:44,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555695105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:44,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:44,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:30:44,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526140150] [2023-11-06 22:30:44,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:44,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:30:44,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:44,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:30:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:30:44,224 INFO L87 Difference]: Start difference. First operand has 287 states, 208 states have (on average 1.5288461538461537) internal successors, (318), 209 states have internal predecessors, (318), 76 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) Second operand has 2 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (76), 2 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 2 states have call successors, (76) [2023-11-06 22:30:44,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:44,330 INFO L93 Difference]: Finished difference Result 567 states and 1010 transitions. [2023-11-06 22:30:44,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:30:44,332 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (76), 2 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 2 states have call successors, (76) Word has length 520 [2023-11-06 22:30:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:44,354 INFO L225 Difference]: With dead ends: 567 [2023-11-06 22:30:44,354 INFO L226 Difference]: Without dead ends: 283 [2023-11-06 22:30:44,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:30:44,364 INFO L413 NwaCegarLoop]: 463 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, 463 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:44,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:30:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-06 22:30:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2023-11-06 22:30:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 205 states have (on average 1.5170731707317073) internal successors, (311), 205 states have internal predecessors, (311), 76 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-06 22:30:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 463 transitions. [2023-11-06 22:30:44,468 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 463 transitions. Word has length 520 [2023-11-06 22:30:44,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:44,469 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 463 transitions. [2023-11-06 22:30:44,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (76), 2 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 2 states have call successors, (76) [2023-11-06 22:30:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 463 transitions. [2023-11-06 22:30:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-11-06 22:30:44,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:44,488 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:44,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:30:44,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:30:44,697 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:44,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:44,698 INFO L85 PathProgramCache]: Analyzing trace with hash -383642807, now seen corresponding path program 1 times [2023-11-06 22:30:44,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:44,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143059208] [2023-11-06 22:30:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:44,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:44,929 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:44,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193678535] [2023-11-06 22:30:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:44,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:44,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:44,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:44,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:30:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:45,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:30:45,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-06 22:30:45,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:45,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:45,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143059208] [2023-11-06 22:30:45,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:45,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193678535] [2023-11-06 22:30:45,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193678535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:45,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:45,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:30:45,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089369511] [2023-11-06 22:30:45,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:45,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:45,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:45,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:45,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:45,565 INFO L87 Difference]: Start difference. First operand 283 states and 463 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:30:45,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:45,693 INFO L93 Difference]: Finished difference Result 744 states and 1218 transitions. [2023-11-06 22:30:45,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:30:45,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 520 [2023-11-06 22:30:45,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:45,702 INFO L225 Difference]: With dead ends: 744 [2023-11-06 22:30:45,702 INFO L226 Difference]: Without dead ends: 464 [2023-11-06 22:30:45,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:45,705 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 292 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:45,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 891 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:30:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-11-06 22:30:45,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 461. [2023-11-06 22:30:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 349 states have (on average 1.5300859598853869) internal successors, (534), 350 states have internal predecessors, (534), 109 states have call successors, (109), 2 states have call predecessors, (109), 2 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-06 22:30:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 752 transitions. [2023-11-06 22:30:45,780 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 752 transitions. Word has length 520 [2023-11-06 22:30:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:45,785 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 752 transitions. [2023-11-06 22:30:45,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:30:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 752 transitions. [2023-11-06 22:30:45,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-11-06 22:30:45,792 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:45,793 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:45,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:46,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:46,001 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:46,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:46,002 INFO L85 PathProgramCache]: Analyzing trace with hash 217861703, now seen corresponding path program 1 times [2023-11-06 22:30:46,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:46,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173066459] [2023-11-06 22:30:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:46,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:46,164 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:46,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229785474] [2023-11-06 22:30:46,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:46,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:46,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:46,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:46,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:30:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:46,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:30:46,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-06 22:30:46,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:46,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:46,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173066459] [2023-11-06 22:30:46,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:46,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229785474] [2023-11-06 22:30:46,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229785474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:46,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:46,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:30:46,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206051679] [2023-11-06 22:30:46,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:46,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:46,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:46,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:46,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:46,756 INFO L87 Difference]: Start difference. First operand 461 states and 752 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:30:46,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:46,893 INFO L93 Difference]: Finished difference Result 1363 states and 2227 transitions. [2023-11-06 22:30:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:30:46,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 520 [2023-11-06 22:30:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:46,907 INFO L225 Difference]: With dead ends: 1363 [2023-11-06 22:30:46,907 INFO L226 Difference]: Without dead ends: 905 [2023-11-06 22:30:46,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:46,913 INFO L413 NwaCegarLoop]: 713 mSDtfsCounter, 444 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:46,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 1163 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:30:46,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2023-11-06 22:30:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 467. [2023-11-06 22:30:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 355 states have (on average 1.5267605633802817) internal successors, (542), 356 states have internal predecessors, (542), 109 states have call successors, (109), 2 states have call predecessors, (109), 2 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-06 22:30:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 760 transitions. [2023-11-06 22:30:47,018 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 760 transitions. Word has length 520 [2023-11-06 22:30:47,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:47,023 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 760 transitions. [2023-11-06 22:30:47,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:30:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 760 transitions. [2023-11-06 22:30:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-11-06 22:30:47,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:47,032 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:47,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:47,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:47,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:47,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:47,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2115530935, now seen corresponding path program 1 times [2023-11-06 22:30:47,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:47,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139137982] [2023-11-06 22:30:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:47,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:47,382 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:47,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410138221] [2023-11-06 22:30:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:47,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:47,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:47,384 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:47,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:30:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:47,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:30:47,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-06 22:30:47,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:47,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:47,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139137982] [2023-11-06 22:30:47,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:47,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410138221] [2023-11-06 22:30:47,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410138221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:47,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:48,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:30:48,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195681740] [2023-11-06 22:30:48,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:48,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:48,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:48,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:48,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:48,004 INFO L87 Difference]: Start difference. First operand 467 states and 760 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:30:48,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:48,111 INFO L93 Difference]: Finished difference Result 1395 states and 2274 transitions. [2023-11-06 22:30:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:30:48,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 520 [2023-11-06 22:30:48,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:48,123 INFO L225 Difference]: With dead ends: 1395 [2023-11-06 22:30:48,123 INFO L226 Difference]: Without dead ends: 931 [2023-11-06 22:30:48,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:48,132 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 442 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:48,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 1181 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:30:48,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-11-06 22:30:48,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2023-11-06 22:30:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 706 states have (on average 1.5212464589235128) internal successors, (1074), 708 states have internal predecessors, (1074), 218 states have call successors, (218), 4 states have call predecessors, (218), 4 states have return successors, (218), 216 states have call predecessors, (218), 218 states have call successors, (218) [2023-11-06 22:30:48,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1510 transitions. [2023-11-06 22:30:48,263 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1510 transitions. Word has length 520 [2023-11-06 22:30:48,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:48,265 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1510 transitions. [2023-11-06 22:30:48,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:30:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1510 transitions. [2023-11-06 22:30:48,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-11-06 22:30:48,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:48,271 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:48,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:48,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:48,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:48,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:48,481 INFO L85 PathProgramCache]: Analyzing trace with hash -187258233, now seen corresponding path program 1 times [2023-11-06 22:30:48,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:48,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396366795] [2023-11-06 22:30:48,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:48,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:48,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:48,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651549296] [2023-11-06 22:30:48,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:48,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:48,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:48,571 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:48,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:30:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:49,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 1351 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:30:49,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-06 22:30:49,216 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:49,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:49,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396366795] [2023-11-06 22:30:49,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:49,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651549296] [2023-11-06 22:30:49,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651549296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:49,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:49,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:30:49,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574137408] [2023-11-06 22:30:49,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:49,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:49,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:49,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:49,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:49,221 INFO L87 Difference]: Start difference. First operand 929 states and 1510 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:30:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:49,378 INFO L93 Difference]: Finished difference Result 2765 states and 4494 transitions. [2023-11-06 22:30:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:30:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 520 [2023-11-06 22:30:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:49,395 INFO L225 Difference]: With dead ends: 2765 [2023-11-06 22:30:49,395 INFO L226 Difference]: Without dead ends: 1839 [2023-11-06 22:30:49,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:49,400 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 409 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:49,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 894 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:30:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2023-11-06 22:30:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1123. [2023-11-06 22:30:49,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 900 states have (on average 1.531111111111111) internal successors, (1378), 902 states have internal predecessors, (1378), 218 states have call successors, (218), 4 states have call predecessors, (218), 4 states have return successors, (218), 216 states have call predecessors, (218), 218 states have call successors, (218) [2023-11-06 22:30:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1814 transitions. [2023-11-06 22:30:49,611 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1814 transitions. Word has length 520 [2023-11-06 22:30:49,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:49,613 INFO L495 AbstractCegarLoop]: Abstraction has 1123 states and 1814 transitions. [2023-11-06 22:30:49,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:30:49,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1814 transitions. [2023-11-06 22:30:49,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-11-06 22:30:49,620 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:49,620 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:49,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:49,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:49,829 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:49,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash 744694991, now seen corresponding path program 1 times [2023-11-06 22:30:49,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:49,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445451300] [2023-11-06 22:30:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:49,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:49,925 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:49,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674505479] [2023-11-06 22:30:49,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:49,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:49,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:49,927 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:49,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:30:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:50,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 1350 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:30:50,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-06 22:30:50,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:50,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:50,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445451300] [2023-11-06 22:30:50,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:50,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674505479] [2023-11-06 22:30:50,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674505479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:50,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:50,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:30:50,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708906030] [2023-11-06 22:30:50,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:50,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:30:50,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:50,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:30:50,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:30:50,521 INFO L87 Difference]: Start difference. First operand 1123 states and 1814 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:30:50,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:50,742 INFO L93 Difference]: Finished difference Result 3157 states and 5146 transitions. [2023-11-06 22:30:50,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:30:50,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 520 [2023-11-06 22:30:50,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:50,760 INFO L225 Difference]: With dead ends: 3157 [2023-11-06 22:30:50,760 INFO L226 Difference]: Without dead ends: 2037 [2023-11-06 22:30:50,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:30:50,766 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 574 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:50,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 1560 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:30:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2023-11-06 22:30:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1123. [2023-11-06 22:30:50,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 900 states have (on average 1.5266666666666666) internal successors, (1374), 902 states have internal predecessors, (1374), 218 states have call successors, (218), 4 states have call predecessors, (218), 4 states have return successors, (218), 216 states have call predecessors, (218), 218 states have call successors, (218) [2023-11-06 22:30:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1810 transitions. [2023-11-06 22:30:50,992 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1810 transitions. Word has length 520 [2023-11-06 22:30:50,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:50,993 INFO L495 AbstractCegarLoop]: Abstraction has 1123 states and 1810 transitions. [2023-11-06 22:30:50,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:30:50,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1810 transitions. [2023-11-06 22:30:51,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-11-06 22:30:51,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:51,000 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:51,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:51,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:51,210 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:51,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:51,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1379499717, now seen corresponding path program 1 times [2023-11-06 22:30:51,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:51,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111871359] [2023-11-06 22:30:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:51,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:51,309 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:51,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75206903] [2023-11-06 22:30:51,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:51,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:51,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:51,312 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:51,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:30:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:51,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 1352 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:30:51,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-06 22:30:52,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:52,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:52,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111871359] [2023-11-06 22:30:52,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:52,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75206903] [2023-11-06 22:30:52,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75206903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:52,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:52,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:30:52,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527403054] [2023-11-06 22:30:52,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:52,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:52,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:52,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:52,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:52,021 INFO L87 Difference]: Start difference. First operand 1123 states and 1810 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:30:52,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:52,242 INFO L93 Difference]: Finished difference Result 2959 states and 4786 transitions. [2023-11-06 22:30:52,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:30:52,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 520 [2023-11-06 22:30:52,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:52,259 INFO L225 Difference]: With dead ends: 2959 [2023-11-06 22:30:52,259 INFO L226 Difference]: Without dead ends: 1839 [2023-11-06 22:30:52,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:52,265 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 391 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:52,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1259 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:30:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2023-11-06 22:30:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1321. [2023-11-06 22:30:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1098 states have (on average 1.5610200364298725) internal successors, (1714), 1100 states have internal predecessors, (1714), 218 states have call successors, (218), 4 states have call predecessors, (218), 4 states have return successors, (218), 216 states have call predecessors, (218), 218 states have call successors, (218) [2023-11-06 22:30:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 2150 transitions. [2023-11-06 22:30:52,426 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 2150 transitions. Word has length 520 [2023-11-06 22:30:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:52,428 INFO L495 AbstractCegarLoop]: Abstraction has 1321 states and 2150 transitions. [2023-11-06 22:30:52,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:30:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 2150 transitions. [2023-11-06 22:30:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-11-06 22:30:52,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:52,435 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:52,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:52,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:52,644 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:52,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:52,645 INFO L85 PathProgramCache]: Analyzing trace with hash 69467507, now seen corresponding path program 1 times [2023-11-06 22:30:52,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:52,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462306758] [2023-11-06 22:30:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:52,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:52,751 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:52,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893067932] [2023-11-06 22:30:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:52,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:52,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:52,753 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:52,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:30:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:53,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:30:53,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-06 22:30:53,425 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:53,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:53,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462306758] [2023-11-06 22:30:53,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:53,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893067932] [2023-11-06 22:30:53,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893067932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:53,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:53,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:30:53,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211425394] [2023-11-06 22:30:53,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:53,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:30:53,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:53,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:30:53,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:30:53,429 INFO L87 Difference]: Start difference. First operand 1321 states and 2150 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:30:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:55,268 INFO L93 Difference]: Finished difference Result 4025 states and 6539 transitions. [2023-11-06 22:30:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:30:55,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 521 [2023-11-06 22:30:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:55,288 INFO L225 Difference]: With dead ends: 4025 [2023-11-06 22:30:55,288 INFO L226 Difference]: Without dead ends: 2707 [2023-11-06 22:30:55,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:30:55,294 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 2149 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2149 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:55,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2149 Valid, 1371 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:30:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2707 states. [2023-11-06 22:30:55,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2707 to 2041. [2023-11-06 22:30:55,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 1641 states have (on average 1.530164533820841) internal successors, (2511), 1646 states have internal predecessors, (2511), 389 states have call successors, (389), 10 states have call predecessors, (389), 10 states have return successors, (389), 384 states have call predecessors, (389), 389 states have call successors, (389) [2023-11-06 22:30:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 3289 transitions. [2023-11-06 22:30:55,553 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 3289 transitions. Word has length 521 [2023-11-06 22:30:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:55,554 INFO L495 AbstractCegarLoop]: Abstraction has 2041 states and 3289 transitions. [2023-11-06 22:30:55,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:30:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 3289 transitions. [2023-11-06 22:30:55,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-11-06 22:30:55,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:55,562 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:55,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:55,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:30:55,771 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:55,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:55,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2100881935, now seen corresponding path program 1 times [2023-11-06 22:30:55,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:55,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460686130] [2023-11-06 22:30:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:55,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:55,861 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:55,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999719073] [2023-11-06 22:30:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:55,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:55,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:55,863 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:55,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:30:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:56,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:30:56,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 4053 proven. 174 refuted. 0 times theorem prover too weak. 7173 trivial. 0 not checked. [2023-11-06 22:30:57,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 51 proven. 174 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-11-06 22:30:57,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:57,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460686130] [2023-11-06 22:30:57,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:30:57,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999719073] [2023-11-06 22:30:57,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999719073] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:57,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:30:57,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:30:57,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19827135] [2023-11-06 22:30:57,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:57,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:30:57,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:57,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:30:57,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:30:57,806 INFO L87 Difference]: Start difference. First operand 2041 states and 3289 transitions. Second operand has 8 states, 8 states have (on average 30.75) internal successors, (246), 8 states have internal predecessors, (246), 3 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 3 states have call predecessors, (135), 3 states have call successors, (135) [2023-11-06 22:30:58,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:58,444 INFO L93 Difference]: Finished difference Result 4020 states and 6448 transitions. [2023-11-06 22:30:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:30:58,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.75) internal successors, (246), 8 states have internal predecessors, (246), 3 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 3 states have call predecessors, (135), 3 states have call successors, (135) Word has length 521 [2023-11-06 22:30:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:58,461 INFO L225 Difference]: With dead ends: 4020 [2023-11-06 22:30:58,461 INFO L226 Difference]: Without dead ends: 2085 [2023-11-06 22:30:58,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1034 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:30:58,468 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 235 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:58,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 986 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:30:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2023-11-06 22:30:58,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 2069. [2023-11-06 22:30:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 1662 states have (on average 1.516245487364621) internal successors, (2520), 1667 states have internal predecessors, (2520), 389 states have call successors, (389), 17 states have call predecessors, (389), 17 states have return successors, (389), 384 states have call predecessors, (389), 389 states have call successors, (389) [2023-11-06 22:30:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3298 transitions. [2023-11-06 22:30:58,787 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3298 transitions. Word has length 521 [2023-11-06 22:30:58,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:58,789 INFO L495 AbstractCegarLoop]: Abstraction has 2069 states and 3298 transitions. [2023-11-06 22:30:58,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.75) internal successors, (246), 8 states have internal predecessors, (246), 3 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 3 states have call predecessors, (135), 3 states have call successors, (135) [2023-11-06 22:30:58,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3298 transitions. [2023-11-06 22:30:58,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-11-06 22:30:58,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:58,798 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:58,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:59,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:30:59,011 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:59,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:59,012 INFO L85 PathProgramCache]: Analyzing trace with hash -49897937, now seen corresponding path program 1 times [2023-11-06 22:30:59,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:59,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045142304] [2023-11-06 22:30:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:59,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:59,106 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:30:59,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739777365] [2023-11-06 22:30:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:59,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:59,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:59,108 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:59,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:30:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:59,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:30:59,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5535 proven. 135 refuted. 0 times theorem prover too weak. 5730 trivial. 0 not checked. [2023-11-06 22:31:00,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 90 proven. 135 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-11-06 22:31:00,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:00,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045142304] [2023-11-06 22:31:00,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:00,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739777365] [2023-11-06 22:31:00,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739777365] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:00,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:00,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:31:00,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283267348] [2023-11-06 22:31:00,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:00,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:31:00,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:00,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:31:00,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:31:00,564 INFO L87 Difference]: Start difference. First operand 2069 states and 3298 transitions. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) [2023-11-06 22:31:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:01,213 INFO L93 Difference]: Finished difference Result 4084 states and 6473 transitions. [2023-11-06 22:31:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:31:01,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) Word has length 521 [2023-11-06 22:31:01,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:01,230 INFO L225 Difference]: With dead ends: 4084 [2023-11-06 22:31:01,230 INFO L226 Difference]: Without dead ends: 2125 [2023-11-06 22:31:01,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1034 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:31:01,236 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 308 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:01,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 946 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:31:01,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2023-11-06 22:31:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 2095. [2023-11-06 22:31:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 1681 states have (on average 1.4937537180249851) internal successors, (2511), 1686 states have internal predecessors, (2511), 389 states have call successors, (389), 24 states have call predecessors, (389), 24 states have return successors, (389), 384 states have call predecessors, (389), 389 states have call successors, (389) [2023-11-06 22:31:01,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 3289 transitions. [2023-11-06 22:31:01,472 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 3289 transitions. Word has length 521 [2023-11-06 22:31:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:01,473 INFO L495 AbstractCegarLoop]: Abstraction has 2095 states and 3289 transitions. [2023-11-06 22:31:01,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) [2023-11-06 22:31:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 3289 transitions. [2023-11-06 22:31:01,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-11-06 22:31:01,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:01,481 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:01,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:01,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:31:01,690 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:01,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash 428509598, now seen corresponding path program 1 times [2023-11-06 22:31:01,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:01,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678825775] [2023-11-06 22:31:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:01,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:01,806 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:01,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596477308] [2023-11-06 22:31:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:01,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:01,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:01,811 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:01,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:31:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:02,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 1352 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:31:02,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-06 22:31:02,579 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:31:02,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:02,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678825775] [2023-11-06 22:31:02,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:02,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596477308] [2023-11-06 22:31:02,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596477308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:02,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:31:02,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:31:02,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313625687] [2023-11-06 22:31:02,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:02,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:31:02,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:02,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:31:02,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:31:02,583 INFO L87 Difference]: Start difference. First operand 2095 states and 3289 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:31:04,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:04,471 INFO L93 Difference]: Finished difference Result 6182 states and 9755 transitions. [2023-11-06 22:31:04,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:31:04,481 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), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 524 [2023-11-06 22:31:04,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:04,519 INFO L225 Difference]: With dead ends: 6182 [2023-11-06 22:31:04,519 INFO L226 Difference]: Without dead ends: 4201 [2023-11-06 22:31:04,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:31:04,525 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 1615 mSDsluCounter, 2037 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 2799 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:04,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1615 Valid, 2799 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 22:31:04,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2023-11-06 22:31:04,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 1950. [2023-11-06 22:31:04,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1651 states have (on average 1.5051483949121744) internal successors, (2485), 1654 states have internal predecessors, (2485), 280 states have call successors, (280), 18 states have call predecessors, (280), 18 states have return successors, (280), 277 states have call predecessors, (280), 280 states have call successors, (280) [2023-11-06 22:31:04,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 3045 transitions. [2023-11-06 22:31:04,981 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 3045 transitions. Word has length 524 [2023-11-06 22:31:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:04,983 INFO L495 AbstractCegarLoop]: Abstraction has 1950 states and 3045 transitions. [2023-11-06 22:31:04,983 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), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:31:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 3045 transitions. [2023-11-06 22:31:04,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-06 22:31:04,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:04,993 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:05,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:05,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:05,203 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:05,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:05,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1776761869, now seen corresponding path program 1 times [2023-11-06 22:31:05,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:05,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225670836] [2023-11-06 22:31:05,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:05,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:05,296 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:05,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964638895] [2023-11-06 22:31:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:05,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:05,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:05,298 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:05,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:31:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:05,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 1352 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:31:05,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-06 22:31:06,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:31:06,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:06,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225670836] [2023-11-06 22:31:06,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:06,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964638895] [2023-11-06 22:31:06,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964638895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:06,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:31:06,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:31:06,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625119170] [2023-11-06 22:31:06,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:06,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:31:06,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:06,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:31:06,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:31:06,078 INFO L87 Difference]: Start difference. First operand 1950 states and 3045 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:31:07,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:07,203 INFO L93 Difference]: Finished difference Result 5592 states and 8724 transitions. [2023-11-06 22:31:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:31:07,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 525 [2023-11-06 22:31:07,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:07,235 INFO L225 Difference]: With dead ends: 5592 [2023-11-06 22:31:07,236 INFO L226 Difference]: Without dead ends: 3760 [2023-11-06 22:31:07,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:31:07,241 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 1187 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 2378 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:07,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1187 Valid, 2378 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:31:07,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2023-11-06 22:31:07,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3212. [2023-11-06 22:31:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 2748 states have (on average 1.517467248908297) internal successors, (4170), 2755 states have internal predecessors, (4170), 433 states have call successors, (433), 30 states have call predecessors, (433), 30 states have return successors, (433), 426 states have call predecessors, (433), 433 states have call successors, (433) [2023-11-06 22:31:07,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 5036 transitions. [2023-11-06 22:31:07,631 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 5036 transitions. Word has length 525 [2023-11-06 22:31:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:07,632 INFO L495 AbstractCegarLoop]: Abstraction has 3212 states and 5036 transitions. [2023-11-06 22:31:07,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-06 22:31:07,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 5036 transitions. [2023-11-06 22:31:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-06 22:31:07,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:07,672 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:07,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:07,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:31:07,873 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:07,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:07,874 INFO L85 PathProgramCache]: Analyzing trace with hash -404954571, now seen corresponding path program 1 times [2023-11-06 22:31:07,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:07,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806547782] [2023-11-06 22:31:07,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:07,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:07,949 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:07,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717708849] [2023-11-06 22:31:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:07,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:07,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:07,951 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:07,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:31:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:08,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 1350 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:31:08,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5643 proven. 129 refuted. 0 times theorem prover too weak. 5628 trivial. 0 not checked. [2023-11-06 22:31:09,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 96 proven. 129 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-11-06 22:31:09,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:09,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806547782] [2023-11-06 22:31:09,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:09,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717708849] [2023-11-06 22:31:09,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717708849] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:09,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:09,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-06 22:31:09,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774428302] [2023-11-06 22:31:09,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:09,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:31:09,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:09,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:31:09,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:31:09,660 INFO L87 Difference]: Start difference. First operand 3212 states and 5036 transitions. Second operand has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 2 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 2 states have call predecessors, (120), 2 states have call successors, (120) [2023-11-06 22:31:10,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:10,547 INFO L93 Difference]: Finished difference Result 4964 states and 7743 transitions. [2023-11-06 22:31:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:31:10,549 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 2 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 2 states have call predecessors, (120), 2 states have call successors, (120) Word has length 525 [2023-11-06 22:31:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:10,559 INFO L225 Difference]: With dead ends: 4964 [2023-11-06 22:31:10,559 INFO L226 Difference]: Without dead ends: 1824 [2023-11-06 22:31:10,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 1040 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:31:10,565 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 779 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:10,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 910 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:31:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2023-11-06 22:31:10,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1057. [2023-11-06 22:31:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 890 states have (on average 1.4707865168539327) internal successors, (1309), 890 states have internal predecessors, (1309), 152 states have call successors, (152), 14 states have call predecessors, (152), 14 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-06 22:31:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1613 transitions. [2023-11-06 22:31:10,722 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1613 transitions. Word has length 525 [2023-11-06 22:31:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:10,723 INFO L495 AbstractCegarLoop]: Abstraction has 1057 states and 1613 transitions. [2023-11-06 22:31:10,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 2 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 2 states have call predecessors, (120), 2 states have call successors, (120) [2023-11-06 22:31:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1613 transitions. [2023-11-06 22:31:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-06 22:31:10,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:10,730 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:10,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:10,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:10,939 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:10,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:10,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2037125169, now seen corresponding path program 1 times [2023-11-06 22:31:10,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:10,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913062608] [2023-11-06 22:31:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:10,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:11,012 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:11,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653190595] [2023-11-06 22:31:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:11,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:11,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:11,014 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:11,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:31:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:11,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 1349 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:31:11,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 3066 proven. 387 refuted. 0 times theorem prover too weak. 7947 trivial. 0 not checked. [2023-11-06 22:31:13,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 36 proven. 189 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-11-06 22:31:14,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:14,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913062608] [2023-11-06 22:31:14,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:14,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653190595] [2023-11-06 22:31:14,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653190595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:14,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:14,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-06 22:31:14,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897569486] [2023-11-06 22:31:14,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:14,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:31:14,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:14,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:31:14,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:31:14,079 INFO L87 Difference]: Start difference. First operand 1057 states and 1613 transitions. Second operand has 15 states, 15 states have (on average 14.866666666666667) internal successors, (223), 15 states have internal predecessors, (223), 4 states have call successors, (143), 3 states have call predecessors, (143), 6 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-11-06 22:31:16,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:16,625 INFO L93 Difference]: Finished difference Result 4829 states and 7478 transitions. [2023-11-06 22:31:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:31:16,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 14.866666666666667) internal successors, (223), 15 states have internal predecessors, (223), 4 states have call successors, (143), 3 states have call predecessors, (143), 6 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) Word has length 525 [2023-11-06 22:31:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:16,638 INFO L225 Difference]: With dead ends: 4829 [2023-11-06 22:31:16,638 INFO L226 Difference]: Without dead ends: 3775 [2023-11-06 22:31:16,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:31:16,642 INFO L413 NwaCegarLoop]: 867 mSDtfsCounter, 838 mSDsluCounter, 4000 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 4867 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:16,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 4867 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-06 22:31:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2023-11-06 22:31:16,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 1081. [2023-11-06 22:31:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 908 states have (on average 1.4570484581497798) internal successors, (1323), 908 states have internal predecessors, (1323), 152 states have call successors, (152), 20 states have call predecessors, (152), 20 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-06 22:31:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1627 transitions. [2023-11-06 22:31:16,781 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1627 transitions. Word has length 525 [2023-11-06 22:31:16,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:16,782 INFO L495 AbstractCegarLoop]: Abstraction has 1081 states and 1627 transitions. [2023-11-06 22:31:16,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.866666666666667) internal successors, (223), 15 states have internal predecessors, (223), 4 states have call successors, (143), 3 states have call predecessors, (143), 6 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-11-06 22:31:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1627 transitions. [2023-11-06 22:31:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-06 22:31:16,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:16,789 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:16,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:16,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:31:16,998 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:16,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:16,999 INFO L85 PathProgramCache]: Analyzing trace with hash 979287091, now seen corresponding path program 1 times [2023-11-06 22:31:16,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:16,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227857721] [2023-11-06 22:31:17,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:17,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:17,098 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:17,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480438385] [2023-11-06 22:31:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:17,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:17,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:17,100 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:17,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:31:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:17,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:31:17,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 6326 proven. 456 refuted. 0 times theorem prover too weak. 4618 trivial. 0 not checked. [2023-11-06 22:31:19,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 201 proven. 465 refuted. 0 times theorem prover too weak. 10734 trivial. 0 not checked. [2023-11-06 22:31:20,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:20,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227857721] [2023-11-06 22:31:20,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:20,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480438385] [2023-11-06 22:31:20,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480438385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:20,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:20,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-11-06 22:31:20,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145840643] [2023-11-06 22:31:20,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:20,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:31:20,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:20,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:31:20,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:31:20,808 INFO L87 Difference]: Start difference. First operand 1081 states and 1627 transitions. Second operand has 22 states, 22 states have (on average 11.954545454545455) internal successors, (263), 22 states have internal predecessors, (263), 7 states have call successors, (148), 4 states have call predecessors, (148), 10 states have return successors, (149), 7 states have call predecessors, (149), 7 states have call successors, (149) [2023-11-06 22:31:21,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:21,950 INFO L93 Difference]: Finished difference Result 2219 states and 3303 transitions. [2023-11-06 22:31:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:31:21,951 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 11.954545454545455) internal successors, (263), 22 states have internal predecessors, (263), 7 states have call successors, (148), 4 states have call predecessors, (148), 10 states have return successors, (149), 7 states have call predecessors, (149), 7 states have call successors, (149) Word has length 525 [2023-11-06 22:31:21,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:21,956 INFO L225 Difference]: With dead ends: 2219 [2023-11-06 22:31:21,957 INFO L226 Difference]: Without dead ends: 1141 [2023-11-06 22:31:21,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1057 GetRequests, 1028 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:31:21,960 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 441 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:21,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 1062 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:31:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2023-11-06 22:31:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1113. [2023-11-06 22:31:22,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 932 states have (on average 1.4366952789699572) internal successors, (1339), 932 states have internal predecessors, (1339), 152 states have call successors, (152), 28 states have call predecessors, (152), 28 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-06 22:31:22,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1643 transitions. [2023-11-06 22:31:22,126 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1643 transitions. Word has length 525 [2023-11-06 22:31:22,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:22,127 INFO L495 AbstractCegarLoop]: Abstraction has 1113 states and 1643 transitions. [2023-11-06 22:31:22,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.954545454545455) internal successors, (263), 22 states have internal predecessors, (263), 7 states have call successors, (148), 4 states have call predecessors, (148), 10 states have return successors, (149), 7 states have call predecessors, (149), 7 states have call successors, (149) [2023-11-06 22:31:22,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1643 transitions. [2023-11-06 22:31:22,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-06 22:31:22,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:22,133 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:22,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:22,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:31:22,342 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:22,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:22,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1777340175, now seen corresponding path program 1 times [2023-11-06 22:31:22,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:22,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116466872] [2023-11-06 22:31:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:22,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:22,410 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:22,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850326023] [2023-11-06 22:31:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:22,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:22,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:22,412 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:22,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:31:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:23,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:31:23,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 7588 proven. 69 refuted. 0 times theorem prover too weak. 3743 trivial. 0 not checked. [2023-11-06 22:31:25,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-11-06 22:31:26,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:26,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116466872] [2023-11-06 22:31:26,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:26,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850326023] [2023-11-06 22:31:26,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850326023] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:26,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:26,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 19 [2023-11-06 22:31:26,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812024506] [2023-11-06 22:31:26,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:26,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:31:26,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:26,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:31:26,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:31:26,710 INFO L87 Difference]: Start difference. First operand 1113 states and 1643 transitions. Second operand has 19 states, 18 states have (on average 16.333333333333332) internal successors, (294), 19 states have internal predecessors, (294), 7 states have call successors, (152), 4 states have call predecessors, (152), 6 states have return successors, (152), 6 states have call predecessors, (152), 7 states have call successors, (152) [2023-11-06 22:31:29,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:29,919 INFO L93 Difference]: Finished difference Result 3850 states and 5723 transitions. [2023-11-06 22:31:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:31:29,920 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 16.333333333333332) internal successors, (294), 19 states have internal predecessors, (294), 7 states have call successors, (152), 4 states have call predecessors, (152), 6 states have return successors, (152), 6 states have call predecessors, (152), 7 states have call successors, (152) Word has length 525 [2023-11-06 22:31:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:29,928 INFO L225 Difference]: With dead ends: 3850 [2023-11-06 22:31:29,929 INFO L226 Difference]: Without dead ends: 2740 [2023-11-06 22:31:29,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1068 GetRequests, 1033 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=366, Invalid=966, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:31:29,933 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 2856 mSDsluCounter, 3603 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2900 SdHoareTripleChecker+Valid, 3955 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:29,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2900 Valid, 3955 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 1876 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-06 22:31:29,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2023-11-06 22:31:30,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1305. [2023-11-06 22:31:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1032 states have (on average 1.3982558139534884) internal successors, (1443), 1032 states have internal predecessors, (1443), 228 states have call successors, (228), 44 states have call predecessors, (228), 44 states have return successors, (228), 228 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-06 22:31:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 1899 transitions. [2023-11-06 22:31:30,227 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 1899 transitions. Word has length 525 [2023-11-06 22:31:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:30,228 INFO L495 AbstractCegarLoop]: Abstraction has 1305 states and 1899 transitions. [2023-11-06 22:31:30,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 16.333333333333332) internal successors, (294), 19 states have internal predecessors, (294), 7 states have call successors, (152), 4 states have call predecessors, (152), 6 states have return successors, (152), 6 states have call predecessors, (152), 7 states have call successors, (152) [2023-11-06 22:31:30,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 1899 transitions. [2023-11-06 22:31:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-11-06 22:31:30,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:30,234 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:30,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:30,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:31:30,443 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:30,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:30,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1011799180, now seen corresponding path program 1 times [2023-11-06 22:31:30,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:30,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139988849] [2023-11-06 22:31:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:30,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:30,531 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:30,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854622914] [2023-11-06 22:31:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:30,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:30,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:30,533 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:30,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:31:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:31,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:31:31,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 75 proven. 225 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-06 22:31:32,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-11-06 22:31:33,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:33,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139988849] [2023-11-06 22:31:33,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:33,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854622914] [2023-11-06 22:31:33,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854622914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:33,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:33,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-06 22:31:33,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935556484] [2023-11-06 22:31:33,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:33,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:31:33,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:33,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:31:33,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:31:33,597 INFO L87 Difference]: Start difference. First operand 1305 states and 1899 transitions. Second operand has 12 states, 12 states have (on average 21.916666666666668) internal successors, (263), 12 states have internal predecessors, (263), 4 states have call successors, (152), 3 states have call predecessors, (152), 4 states have return successors, (152), 2 states have call predecessors, (152), 4 states have call successors, (152) [2023-11-06 22:31:34,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:34,565 INFO L93 Difference]: Finished difference Result 3025 states and 4472 transitions. [2023-11-06 22:31:34,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:31:34,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.916666666666668) internal successors, (263), 12 states have internal predecessors, (263), 4 states have call successors, (152), 3 states have call predecessors, (152), 4 states have return successors, (152), 2 states have call predecessors, (152), 4 states have call successors, (152) Word has length 526 [2023-11-06 22:31:34,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:34,573 INFO L225 Difference]: With dead ends: 3025 [2023-11-06 22:31:34,573 INFO L226 Difference]: Without dead ends: 1915 [2023-11-06 22:31:34,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1040 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:31:34,577 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 2000 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2000 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:34,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2000 Valid, 1224 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:31:34,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2023-11-06 22:31:34,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1375. [2023-11-06 22:31:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1099 states have (on average 1.3812556869881711) internal successors, (1518), 1099 states have internal predecessors, (1518), 228 states have call successors, (228), 47 states have call predecessors, (228), 47 states have return successors, (228), 228 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-06 22:31:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 1974 transitions. [2023-11-06 22:31:34,858 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 1974 transitions. Word has length 526 [2023-11-06 22:31:34,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:34,859 INFO L495 AbstractCegarLoop]: Abstraction has 1375 states and 1974 transitions. [2023-11-06 22:31:34,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.916666666666668) internal successors, (263), 12 states have internal predecessors, (263), 4 states have call successors, (152), 3 states have call predecessors, (152), 4 states have return successors, (152), 2 states have call predecessors, (152), 4 states have call successors, (152) [2023-11-06 22:31:34,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 1974 transitions. [2023-11-06 22:31:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-11-06 22:31:34,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:34,868 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:34,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:35,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:31:35,078 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:35,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:35,079 INFO L85 PathProgramCache]: Analyzing trace with hash -763652686, now seen corresponding path program 1 times [2023-11-06 22:31:35,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:35,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914324525] [2023-11-06 22:31:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:35,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:35,171 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:35,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221639150] [2023-11-06 22:31:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:35,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:35,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:35,174 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:35,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:31:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:36,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:31:36,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 4369 proven. 168 refuted. 0 times theorem prover too weak. 6863 trivial. 0 not checked. [2023-11-06 22:31:38,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 57 proven. 168 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-11-06 22:31:39,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:39,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914324525] [2023-11-06 22:31:39,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:39,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221639150] [2023-11-06 22:31:39,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221639150] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:39,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:39,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 22:31:39,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461292591] [2023-11-06 22:31:39,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:39,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:31:39,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:39,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:31:39,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:31:39,714 INFO L87 Difference]: Start difference. First operand 1375 states and 1974 transitions. Second operand has 14 states, 14 states have (on average 19.642857142857142) internal successors, (275), 14 states have internal predecessors, (275), 4 states have call successors, (152), 3 states have call predecessors, (152), 5 states have return successors, (152), 4 states have call predecessors, (152), 4 states have call successors, (152) [2023-11-06 22:31:44,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:44,056 INFO L93 Difference]: Finished difference Result 6726 states and 9886 transitions. [2023-11-06 22:31:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:31:44,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.642857142857142) internal successors, (275), 14 states have internal predecessors, (275), 4 states have call successors, (152), 3 states have call predecessors, (152), 5 states have return successors, (152), 4 states have call predecessors, (152), 4 states have call successors, (152) Word has length 526 [2023-11-06 22:31:44,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:44,070 INFO L225 Difference]: With dead ends: 6726 [2023-11-06 22:31:44,070 INFO L226 Difference]: Without dead ends: 5550 [2023-11-06 22:31:44,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1079 GetRequests, 1044 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=926, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:31:44,075 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 3560 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 2477 mSolverCounterSat, 908 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3635 SdHoareTripleChecker+Valid, 3756 SdHoareTripleChecker+Invalid, 3385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 908 IncrementalHoareTripleChecker+Valid, 2477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:44,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3635 Valid, 3756 Invalid, 3385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [908 Valid, 2477 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-06 22:31:44,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2023-11-06 22:31:44,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 2841. [2023-11-06 22:31:44,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2380 states have (on average 1.4126050420168068) internal successors, (3362), 2380 states have internal predecessors, (3362), 380 states have call successors, (380), 80 states have call predecessors, (380), 80 states have return successors, (380), 380 states have call predecessors, (380), 380 states have call successors, (380) [2023-11-06 22:31:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 4122 transitions. [2023-11-06 22:31:44,748 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 4122 transitions. Word has length 526 [2023-11-06 22:31:44,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:44,749 INFO L495 AbstractCegarLoop]: Abstraction has 2841 states and 4122 transitions. [2023-11-06 22:31:44,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.642857142857142) internal successors, (275), 14 states have internal predecessors, (275), 4 states have call successors, (152), 3 states have call predecessors, (152), 5 states have return successors, (152), 4 states have call predecessors, (152), 4 states have call successors, (152) [2023-11-06 22:31:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 4122 transitions. [2023-11-06 22:31:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-11-06 22:31:44,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:44,756 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:44,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:44,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:31:44,966 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:44,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:44,967 INFO L85 PathProgramCache]: Analyzing trace with hash -836039244, now seen corresponding path program 1 times [2023-11-06 22:31:44,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:44,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089251222] [2023-11-06 22:31:44,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:44,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:45,040 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:45,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946174800] [2023-11-06 22:31:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:45,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:45,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:45,042 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:45,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:31:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:45,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 1343 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:31:45,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 6050 proven. 486 refuted. 0 times theorem prover too weak. 4864 trivial. 0 not checked. [2023-11-06 22:31:50,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 162 proven. 285 refuted. 0 times theorem prover too weak. 10953 trivial. 0 not checked. [2023-11-06 22:32:31,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:31,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089251222] [2023-11-06 22:32:31,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:32:31,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946174800] [2023-11-06 22:32:31,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946174800] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:31,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:32:31,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2023-11-06 22:32:31,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706469900] [2023-11-06 22:32:31,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:31,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:32:31,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:31,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:32:31,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=548, Unknown=1, NotChecked=0, Total=702 [2023-11-06 22:32:31,629 INFO L87 Difference]: Start difference. First operand 2841 states and 4122 transitions. Second operand has 27 states, 26 states have (on average 11.5) internal successors, (299), 25 states have internal predecessors, (299), 9 states have call successors, (152), 6 states have call predecessors, (152), 10 states have return successors, (152), 9 states have call predecessors, (152), 9 states have call successors, (152) [2023-11-06 22:32:38,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:32:40,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:32:43,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:32:45,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:32:48,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:32:50,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:32:56,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:32:58,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:01,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:03,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:06,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:11,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:15,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:17,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:21,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:26,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:28,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:31,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:34,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:36,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:38,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:42,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:44,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:46,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:50,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:52,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:55,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:56,746 INFO L93 Difference]: Finished difference Result 16281 states and 23850 transitions. [2023-11-06 22:33:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-06 22:33:56,747 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 11.5) internal successors, (299), 25 states have internal predecessors, (299), 9 states have call successors, (152), 6 states have call predecessors, (152), 10 states have return successors, (152), 9 states have call predecessors, (152), 9 states have call successors, (152) Word has length 526 [2023-11-06 22:33:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:56,778 INFO L225 Difference]: With dead ends: 16281 [2023-11-06 22:33:56,778 INFO L226 Difference]: Without dead ends: 13643 [2023-11-06 22:33:56,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1133 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3170 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=2143, Invalid=7362, Unknown=1, NotChecked=0, Total=9506 [2023-11-06 22:33:56,788 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 3626 mSDsluCounter, 6021 mSDsCounter, 0 mSdLazyCounter, 5613 mSolverCounterSat, 878 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3661 SdHoareTripleChecker+Valid, 6578 SdHoareTripleChecker+Invalid, 6510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 5613 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:33:56,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3661 Valid, 6578 Invalid, 6510 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [878 Valid, 5613 Invalid, 19 Unknown, 0 Unchecked, 76.6s Time] [2023-11-06 22:33:56,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13643 states. [2023-11-06 22:33:58,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13643 to 11721. [2023-11-06 22:33:58,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11721 states, 10212 states have (on average 1.427144535840188) internal successors, (14574), 10220 states have internal predecessors, (14574), 1204 states have call successors, (1204), 304 states have call predecessors, (1204), 304 states have return successors, (1204), 1196 states have call predecessors, (1204), 1204 states have call successors, (1204) [2023-11-06 22:33:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11721 states to 11721 states and 16982 transitions. [2023-11-06 22:33:58,806 INFO L78 Accepts]: Start accepts. Automaton has 11721 states and 16982 transitions. Word has length 526 [2023-11-06 22:33:58,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:58,807 INFO L495 AbstractCegarLoop]: Abstraction has 11721 states and 16982 transitions. [2023-11-06 22:33:58,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 11.5) internal successors, (299), 25 states have internal predecessors, (299), 9 states have call successors, (152), 6 states have call predecessors, (152), 10 states have return successors, (152), 9 states have call predecessors, (152), 9 states have call successors, (152) [2023-11-06 22:33:58,807 INFO L276 IsEmpty]: Start isEmpty. Operand 11721 states and 16982 transitions. [2023-11-06 22:33:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-11-06 22:33:58,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:58,817 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:58,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-06 22:33:59,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:59,028 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:33:59,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:59,028 INFO L85 PathProgramCache]: Analyzing trace with hash -970052750, now seen corresponding path program 1 times [2023-11-06 22:33:59,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:59,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541709378] [2023-11-06 22:33:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:59,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:59,109 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:33:59,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911512905] [2023-11-06 22:33:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:59,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:59,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:59,111 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:59,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac4a323d-c054-44b9-9672-cdf2c702fba6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process