./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-28.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-28.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1759abcdcdacb11ff4424134b4ed938cccdebafbf4e21a4bd94aebb869ddee2f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:40:21,770 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:40:21,901 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:40:21,911 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:40:21,912 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:40:21,942 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:40:21,942 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:40:21,943 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:40:21,944 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:40:21,946 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:40:21,947 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:40:21,948 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:40:21,948 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:40:21,949 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:40:21,949 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:40:21,950 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:40:21,950 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:40:21,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:40:21,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:40:21,952 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:40:21,952 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:40:21,953 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:40:21,954 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:40:21,954 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:40:21,955 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:40:21,955 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:40:21,956 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:40:21,956 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:40:21,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:21,957 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:40:21,958 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:40:21,958 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:40:21,959 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:40:21,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:40:21,960 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:40:21,960 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:40:21,961 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:40:21,961 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:40:21,962 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:40:21,962 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_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1759abcdcdacb11ff4424134b4ed938cccdebafbf4e21a4bd94aebb869ddee2f [2023-11-19 07:40:22,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:40:22,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:40:22,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:40:22,255 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:40:22,255 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:40:22,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-28.i [2023-11-19 07:40:25,436 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:40:25,771 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:40:25,772 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-28.i [2023-11-19 07:40:25,790 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/data/1606c3bbe/af48cf2b178f4fe7a0472dde64864d5e/FLAGf121f3cd4 [2023-11-19 07:40:25,806 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/data/1606c3bbe/af48cf2b178f4fe7a0472dde64864d5e [2023-11-19 07:40:25,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:40:25,811 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:40:25,812 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:25,812 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:40:25,818 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:40:25,819 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:25" (1/1) ... [2023-11-19 07:40:25,820 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13148e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:25, skipping insertion in model container [2023-11-19 07:40:25,821 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:25" (1/1) ... [2023-11-19 07:40:25,896 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:40:26,064 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_0f661845-8135-4128-9968-14ff3f4c2430/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-28.i[916,929] [2023-11-19 07:40:26,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:26,445 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:40:26,457 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_0f661845-8135-4128-9968-14ff3f4c2430/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-28.i[916,929] [2023-11-19 07:40:26,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:26,762 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:40:26,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:26 WrapperNode [2023-11-19 07:40:26,763 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:26,765 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:26,765 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:40:26,765 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:40:26,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:26" (1/1) ... [2023-11-19 07:40:26,830 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:26" (1/1) ... [2023-11-19 07:40:27,011 INFO L138 Inliner]: procedures = 26, calls = 84, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 866 [2023-11-19 07:40:27,012 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:27,013 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:40:27,013 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:40:27,013 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:40:27,024 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:26" (1/1) ... [2023-11-19 07:40:27,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:26" (1/1) ... [2023-11-19 07:40:27,050 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:26" (1/1) ... [2023-11-19 07:40:27,050 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:26" (1/1) ... [2023-11-19 07:40:27,129 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:26" (1/1) ... [2023-11-19 07:40:27,151 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:26" (1/1) ... [2023-11-19 07:40:27,181 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:26" (1/1) ... [2023-11-19 07:40:27,193 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:26" (1/1) ... [2023-11-19 07:40:27,235 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:40:27,237 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:40:27,237 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:40:27,237 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:40:27,238 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:26" (1/1) ... [2023-11-19 07:40:27,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:27,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:27,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:40:27,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:40:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:40:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:40:27,323 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:40:27,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:40:27,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:40:27,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:40:27,502 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:40:27,505 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:40:29,277 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:40:29,298 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:40:29,298 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:40:29,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:29 BoogieIcfgContainer [2023-11-19 07:40:29,310 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:40:29,314 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:40:29,314 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:40:29,319 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:40:29,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:40:25" (1/3) ... [2023-11-19 07:40:29,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13cd693b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:29, skipping insertion in model container [2023-11-19 07:40:29,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:26" (2/3) ... [2023-11-19 07:40:29,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13cd693b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:29, skipping insertion in model container [2023-11-19 07:40:29,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:29" (3/3) ... [2023-11-19 07:40:29,324 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-28.i [2023-11-19 07:40:29,343 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:40:29,343 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:40:29,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:29,430 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4c436015, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:29,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:40:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 335 states, 261 states have (on average 1.5747126436781609) internal successors, (411), 262 states have internal predecessors, (411), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-19 07:40:29,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2023-11-19 07:40:29,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:29,496 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:29,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:29,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1585181985, now seen corresponding path program 1 times [2023-11-19 07:40:29,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:29,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058728844] [2023-11-19 07:40:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:29,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:30,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:30,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058728844] [2023-11-19 07:40:30,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:40:30,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633299529] [2023-11-19 07:40:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:30,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:30,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:30,050 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:30,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:40:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:30,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:40:30,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 9800 trivial. 0 not checked. [2023-11-19 07:40:30,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:30,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633299529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:30,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:30,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:30,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098575531] [2023-11-19 07:40:30,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:30,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:40:30,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:30,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:40:30,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:40:30,734 INFO L87 Difference]: Start difference. First operand has 335 states, 261 states have (on average 1.5747126436781609) internal successors, (411), 262 states have internal predecessors, (411), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) Second operand has 2 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 2 states have call successors, (71) [2023-11-19 07:40:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:30,854 INFO L93 Difference]: Finished difference Result 662 states and 1169 transitions. [2023-11-19 07:40:30,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:40:30,857 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 2 states have call successors, (71) Word has length 502 [2023-11-19 07:40:30,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:30,874 INFO L225 Difference]: With dead ends: 662 [2023-11-19 07:40:30,874 INFO L226 Difference]: Without dead ends: 330 [2023-11-19 07:40:30,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:40:30,887 INFO L413 NwaCegarLoop]: 540 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, 540 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:30,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-11-19 07:40:30,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2023-11-19 07:40:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 257 states have (on average 1.54863813229572) internal successors, (398), 257 states have internal predecessors, (398), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-19 07:40:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 540 transitions. [2023-11-19 07:40:30,981 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 540 transitions. Word has length 502 [2023-11-19 07:40:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:30,982 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 540 transitions. [2023-11-19 07:40:30,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 2 states have call successors, (71) [2023-11-19 07:40:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 540 transitions. [2023-11-19 07:40:30,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2023-11-19 07:40:30,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:30,998 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:31,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:31,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:40:31,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:31,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:31,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1761132841, now seen corresponding path program 1 times [2023-11-19 07:40:31,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:31,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271966285] [2023-11-19 07:40:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:31,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:31,401 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:31,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794156979] [2023-11-19 07:40:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:31,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:31,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:31,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:31,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:40:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:31,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:40:31,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-19 07:40:32,089 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:32,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:32,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271966285] [2023-11-19 07:40:32,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:32,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794156979] [2023-11-19 07:40:32,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794156979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:32,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:32,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:32,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122508840] [2023-11-19 07:40:32,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:32,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:32,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:32,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:32,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:32,102 INFO L87 Difference]: Start difference. First operand 330 states and 540 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:32,246 INFO L93 Difference]: Finished difference Result 657 states and 1077 transitions. [2023-11-19 07:40:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:32,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 502 [2023-11-19 07:40:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:32,257 INFO L225 Difference]: With dead ends: 657 [2023-11-19 07:40:32,257 INFO L226 Difference]: Without dead ends: 330 [2023-11-19 07:40:32,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:40:32,261 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 645 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:32,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 1060 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:32,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-11-19 07:40:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2023-11-19 07:40:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 257 states have (on average 1.5447470817120623) internal successors, (397), 257 states have internal predecessors, (397), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-19 07:40:32,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 539 transitions. [2023-11-19 07:40:32,325 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 539 transitions. Word has length 502 [2023-11-19 07:40:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:32,330 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 539 transitions. [2023-11-19 07:40:32,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 539 transitions. [2023-11-19 07:40:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2023-11-19 07:40:32,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:32,347 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:32,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:32,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 07:40:32,560 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:32,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:32,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1854562201, now seen corresponding path program 1 times [2023-11-19 07:40:32,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:32,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371043556] [2023-11-19 07:40:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:32,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:32,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:32,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778942517] [2023-11-19 07:40:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:32,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:32,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:32,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:32,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:40:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:33,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:40:33,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-19 07:40:33,205 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:33,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:33,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371043556] [2023-11-19 07:40:33,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:33,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778942517] [2023-11-19 07:40:33,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778942517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:33,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:33,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:40:33,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870758097] [2023-11-19 07:40:33,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:33,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:33,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:33,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:33,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:33,210 INFO L87 Difference]: Start difference. First operand 330 states and 539 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:33,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:33,241 INFO L93 Difference]: Finished difference Result 657 states and 1075 transitions. [2023-11-19 07:40:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:33,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 502 [2023-11-19 07:40:33,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:33,246 INFO L225 Difference]: With dead ends: 657 [2023-11-19 07:40:33,246 INFO L226 Difference]: Without dead ends: 330 [2023-11-19 07:40:33,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:33,249 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 89 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:33,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 983 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:33,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-11-19 07:40:33,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2023-11-19 07:40:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 257 states have (on average 1.5408560311284047) internal successors, (396), 257 states have internal predecessors, (396), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-19 07:40:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 538 transitions. [2023-11-19 07:40:33,279 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 538 transitions. Word has length 502 [2023-11-19 07:40:33,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:33,281 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 538 transitions. [2023-11-19 07:40:33,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:33,281 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 538 transitions. [2023-11-19 07:40:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2023-11-19 07:40:33,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:33,292 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:33,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:33,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:33,512 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:33,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1593217665, now seen corresponding path program 1 times [2023-11-19 07:40:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:33,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138348532] [2023-11-19 07:40:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:33,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:33,634 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:33,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867154814] [2023-11-19 07:40:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:33,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:33,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:33,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:33,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:40:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:34,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:40:34,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-19 07:40:34,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:34,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:34,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138348532] [2023-11-19 07:40:34,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:34,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867154814] [2023-11-19 07:40:34,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867154814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:34,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:34,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:40:34,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146862104] [2023-11-19 07:40:34,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:34,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:34,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:34,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:34,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:34,185 INFO L87 Difference]: Start difference. First operand 330 states and 538 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:34,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:34,254 INFO L93 Difference]: Finished difference Result 851 states and 1392 transitions. [2023-11-19 07:40:34,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:34,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 504 [2023-11-19 07:40:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:34,261 INFO L225 Difference]: With dead ends: 851 [2023-11-19 07:40:34,261 INFO L226 Difference]: Without dead ends: 524 [2023-11-19 07:40:34,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:34,263 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 314 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:34,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1057 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-11-19 07:40:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 464. [2023-11-19 07:40:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 391 states have (on average 1.5959079283887467) internal successors, (624), 391 states have internal predecessors, (624), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-19 07:40:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 766 transitions. [2023-11-19 07:40:34,313 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 766 transitions. Word has length 504 [2023-11-19 07:40:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:34,315 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 766 transitions. [2023-11-19 07:40:34,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:34,316 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 766 transitions. [2023-11-19 07:40:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-19 07:40:34,327 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:34,327 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:34,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:34,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:34,552 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:34,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:34,553 INFO L85 PathProgramCache]: Analyzing trace with hash -28903982, now seen corresponding path program 1 times [2023-11-19 07:40:34,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:34,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447578645] [2023-11-19 07:40:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:34,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:34,697 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:34,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527717185] [2023-11-19 07:40:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:34,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:34,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:34,700 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:34,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:40:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:35,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:40:35,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-19 07:40:36,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:36,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:36,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447578645] [2023-11-19 07:40:36,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:36,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527717185] [2023-11-19 07:40:36,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527717185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:36,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:36,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:40:36,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302039914] [2023-11-19 07:40:36,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:36,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:40:36,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:36,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:40:36,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:40:36,837 INFO L87 Difference]: Start difference. First operand 464 states and 766 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:37,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:37,241 INFO L93 Difference]: Finished difference Result 1387 states and 2293 transitions. [2023-11-19 07:40:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:40:37,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 505 [2023-11-19 07:40:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:37,251 INFO L225 Difference]: With dead ends: 1387 [2023-11-19 07:40:37,251 INFO L226 Difference]: Without dead ends: 926 [2023-11-19 07:40:37,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:37,254 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 386 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:37,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 1582 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:40:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2023-11-19 07:40:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 602. [2023-11-19 07:40:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 457 states have (on average 1.5448577680525164) internal successors, (706), 457 states have internal predecessors, (706), 142 states have call successors, (142), 2 states have call predecessors, (142), 2 states have return successors, (142), 142 states have call predecessors, (142), 142 states have call successors, (142) [2023-11-19 07:40:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 990 transitions. [2023-11-19 07:40:37,347 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 990 transitions. Word has length 505 [2023-11-19 07:40:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:37,349 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 990 transitions. [2023-11-19 07:40:37,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:37,349 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 990 transitions. [2023-11-19 07:40:37,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-19 07:40:37,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:37,355 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:37,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:37,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:37,569 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:37,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:37,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1629975088, now seen corresponding path program 1 times [2023-11-19 07:40:37,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:37,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980971357] [2023-11-19 07:40:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:37,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:37,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:37,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712130507] [2023-11-19 07:40:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:37,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:37,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:37,687 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:37,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:40:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:38,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:38,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-19 07:40:38,985 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:38,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:38,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980971357] [2023-11-19 07:40:38,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:38,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712130507] [2023-11-19 07:40:38,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712130507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:38,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:38,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:40:38,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813703820] [2023-11-19 07:40:38,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:38,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:38,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:38,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:38,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:38,989 INFO L87 Difference]: Start difference. First operand 602 states and 990 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:39,947 INFO L93 Difference]: Finished difference Result 1817 states and 2991 transitions. [2023-11-19 07:40:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:40:39,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 505 [2023-11-19 07:40:39,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:39,960 INFO L225 Difference]: With dead ends: 1817 [2023-11-19 07:40:39,960 INFO L226 Difference]: Without dead ends: 1356 [2023-11-19 07:40:39,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:40:39,963 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 870 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:39,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 1876 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:40:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2023-11-19 07:40:40,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1131. [2023-11-19 07:40:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 914 states have (on average 1.5776805251641137) internal successors, (1442), 914 states have internal predecessors, (1442), 213 states have call successors, (213), 3 states have call predecessors, (213), 3 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2023-11-19 07:40:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1868 transitions. [2023-11-19 07:40:40,104 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1868 transitions. Word has length 505 [2023-11-19 07:40:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:40,105 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 1868 transitions. [2023-11-19 07:40:40,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1868 transitions. [2023-11-19 07:40:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-19 07:40:40,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:40,112 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:40,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:40,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:40,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:40,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:40,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1667984387, now seen corresponding path program 1 times [2023-11-19 07:40:40,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:40,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581031703] [2023-11-19 07:40:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:40,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:40,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:40,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138857592] [2023-11-19 07:40:40,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:40,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:40,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:40,419 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:40,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:40:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:40,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:40:40,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-19 07:40:41,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:41,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:41,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581031703] [2023-11-19 07:40:41,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:41,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138857592] [2023-11-19 07:40:41,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138857592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:41,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:41,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:40:41,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327411394] [2023-11-19 07:40:41,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:41,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:40:41,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:41,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:40:41,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:40:41,814 INFO L87 Difference]: Start difference. First operand 1131 states and 1868 transitions. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 6 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:43,383 INFO L93 Difference]: Finished difference Result 3956 states and 6524 transitions. [2023-11-19 07:40:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:40:43,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 6 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 505 [2023-11-19 07:40:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:43,404 INFO L225 Difference]: With dead ends: 3956 [2023-11-19 07:40:43,404 INFO L226 Difference]: Without dead ends: 2966 [2023-11-19 07:40:43,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:40:43,411 INFO L413 NwaCegarLoop]: 1103 mSDtfsCounter, 1656 mSDsluCounter, 2929 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1656 SdHoareTripleChecker+Valid, 4032 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:43,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1656 Valid, 4032 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 07:40:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2966 states. [2023-11-19 07:40:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2966 to 1304. [2023-11-19 07:40:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1087 states have (on average 1.5970561177552898) internal successors, (1736), 1087 states have internal predecessors, (1736), 213 states have call successors, (213), 3 states have call predecessors, (213), 3 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2023-11-19 07:40:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 2162 transitions. [2023-11-19 07:40:43,587 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 2162 transitions. Word has length 505 [2023-11-19 07:40:43,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:43,588 INFO L495 AbstractCegarLoop]: Abstraction has 1304 states and 2162 transitions. [2023-11-19 07:40:43,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 6 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:43,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 2162 transitions. [2023-11-19 07:40:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-19 07:40:43,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:43,594 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:43,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:43,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:40:43,814 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:43,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:43,815 INFO L85 PathProgramCache]: Analyzing trace with hash -698710207, now seen corresponding path program 1 times [2023-11-19 07:40:43,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:43,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090016371] [2023-11-19 07:40:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:43,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:43,900 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:43,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742211203] [2023-11-19 07:40:43,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:43,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:43,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:43,902 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:43,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:40:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:44,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:40:44,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-19 07:40:44,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:44,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:44,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090016371] [2023-11-19 07:40:44,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:44,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742211203] [2023-11-19 07:40:44,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742211203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:44,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:44,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:40:44,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361172336] [2023-11-19 07:40:44,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:44,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:44,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:44,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:44,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:44,457 INFO L87 Difference]: Start difference. First operand 1304 states and 2162 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:44,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:44,657 INFO L93 Difference]: Finished difference Result 3356 states and 5565 transitions. [2023-11-19 07:40:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:44,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 505 [2023-11-19 07:40:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:44,676 INFO L225 Difference]: With dead ends: 3356 [2023-11-19 07:40:44,677 INFO L226 Difference]: Without dead ends: 2331 [2023-11-19 07:40:44,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:44,681 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 532 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:44,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1063 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2023-11-19 07:40:44,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1318. [2023-11-19 07:40:44,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1101 states have (on average 1.589464123524069) internal successors, (1750), 1101 states have internal predecessors, (1750), 213 states have call successors, (213), 3 states have call predecessors, (213), 3 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2023-11-19 07:40:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 2176 transitions. [2023-11-19 07:40:44,863 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 2176 transitions. Word has length 505 [2023-11-19 07:40:44,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:44,864 INFO L495 AbstractCegarLoop]: Abstraction has 1318 states and 2176 transitions. [2023-11-19 07:40:44,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:44,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 2176 transitions. [2023-11-19 07:40:44,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-19 07:40:44,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:44,871 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:44,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:45,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:40:45,085 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:45,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:45,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1596103485, now seen corresponding path program 1 times [2023-11-19 07:40:45,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:45,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081172499] [2023-11-19 07:40:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:45,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:45,209 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:45,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094639] [2023-11-19 07:40:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:45,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:45,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:45,211 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:45,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:40:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:45,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:45,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 2490 proven. 180 refuted. 0 times theorem prover too weak. 7270 trivial. 0 not checked. [2023-11-19 07:40:46,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 9730 trivial. 0 not checked. [2023-11-19 07:40:46,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:46,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081172499] [2023-11-19 07:40:46,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:46,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094639] [2023-11-19 07:40:46,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094639] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:46,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:46,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:40:46,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313936732] [2023-11-19 07:40:46,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:46,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:40:46,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:46,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:40:46,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:46,961 INFO L87 Difference]: Start difference. First operand 1318 states and 2176 transitions. Second operand has 8 states, 8 states have (on average 31.5) internal successors, (252), 8 states have internal predecessors, (252), 3 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 3 states have call predecessors, (132), 3 states have call successors, (132) [2023-11-19 07:40:47,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:47,673 INFO L93 Difference]: Finished difference Result 2393 states and 3938 transitions. [2023-11-19 07:40:47,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:40:47,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 31.5) internal successors, (252), 8 states have internal predecessors, (252), 3 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 3 states have call predecessors, (132), 3 states have call successors, (132) Word has length 505 [2023-11-19 07:40:47,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:47,685 INFO L225 Difference]: With dead ends: 2393 [2023-11-19 07:40:47,685 INFO L226 Difference]: Without dead ends: 1336 [2023-11-19 07:40:47,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 1002 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:40:47,688 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 1215 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:47,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 1158 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:40:47,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2023-11-19 07:40:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1330. [2023-11-19 07:40:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1110 states have (on average 1.5774774774774776) internal successors, (1751), 1110 states have internal predecessors, (1751), 213 states have call successors, (213), 6 states have call predecessors, (213), 6 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2023-11-19 07:40:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 2177 transitions. [2023-11-19 07:40:47,841 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 2177 transitions. Word has length 505 [2023-11-19 07:40:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:47,842 INFO L495 AbstractCegarLoop]: Abstraction has 1330 states and 2177 transitions. [2023-11-19 07:40:47,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.5) internal successors, (252), 8 states have internal predecessors, (252), 3 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 3 states have call predecessors, (132), 3 states have call successors, (132) [2023-11-19 07:40:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 2177 transitions. [2023-11-19 07:40:47,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2023-11-19 07:40:47,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:47,849 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:47,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:48,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:48,065 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:48,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash -185479597, now seen corresponding path program 1 times [2023-11-19 07:40:48,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:48,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055430848] [2023-11-19 07:40:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:48,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:48,147 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:48,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313223252] [2023-11-19 07:40:48,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:48,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:48,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:48,149 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:48,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:40:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:48,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:40:48,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-19 07:40:48,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:48,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:48,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055430848] [2023-11-19 07:40:48,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:48,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313223252] [2023-11-19 07:40:48,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313223252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:48,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:48,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:48,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930545121] [2023-11-19 07:40:48,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:48,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:48,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:48,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:48,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:48,809 INFO L87 Difference]: Start difference. First operand 1330 states and 2177 transitions. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:49,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:49,090 INFO L93 Difference]: Finished difference Result 2969 states and 4889 transitions. [2023-11-19 07:40:49,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:49,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 506 [2023-11-19 07:40:49,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:49,105 INFO L225 Difference]: With dead ends: 2969 [2023-11-19 07:40:49,105 INFO L226 Difference]: Without dead ends: 1794 [2023-11-19 07:40:49,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:40:49,109 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 166 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 2090 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:49,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 2090 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2023-11-19 07:40:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1342. [2023-11-19 07:40:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1122 states have (on average 1.571301247771836) internal successors, (1763), 1122 states have internal predecessors, (1763), 213 states have call successors, (213), 6 states have call predecessors, (213), 6 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2023-11-19 07:40:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 2189 transitions. [2023-11-19 07:40:49,285 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 2189 transitions. Word has length 506 [2023-11-19 07:40:49,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:49,286 INFO L495 AbstractCegarLoop]: Abstraction has 1342 states and 2189 transitions. [2023-11-19 07:40:49,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:49,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 2189 transitions. [2023-11-19 07:40:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2023-11-19 07:40:49,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:49,293 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:49,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:49,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:49,517 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:49,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:49,518 INFO L85 PathProgramCache]: Analyzing trace with hash -864751851, now seen corresponding path program 1 times [2023-11-19 07:40:49,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:49,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603925087] [2023-11-19 07:40:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:49,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:49,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:49,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942572938] [2023-11-19 07:40:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:49,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:49,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:49,593 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:49,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:40:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:50,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:50,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 4110 proven. 150 refuted. 0 times theorem prover too weak. 5680 trivial. 0 not checked. [2023-11-19 07:40:50,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 60 proven. 150 refuted. 0 times theorem prover too weak. 9730 trivial. 0 not checked. [2023-11-19 07:40:51,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:51,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603925087] [2023-11-19 07:40:51,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:51,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942572938] [2023-11-19 07:40:51,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942572938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:51,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:51,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:40:51,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294260193] [2023-11-19 07:40:51,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:51,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:40:51,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:51,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:40:51,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:51,227 INFO L87 Difference]: Start difference. First operand 1342 states and 2189 transitions. Second operand has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) [2023-11-19 07:40:52,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:52,059 INFO L93 Difference]: Finished difference Result 2401 states and 3905 transitions. [2023-11-19 07:40:52,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:40:52,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) Word has length 506 [2023-11-19 07:40:52,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:52,070 INFO L225 Difference]: With dead ends: 2401 [2023-11-19 07:40:52,070 INFO L226 Difference]: Without dead ends: 1360 [2023-11-19 07:40:52,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 1004 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:40:52,073 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 599 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:52,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 1125 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:40:52,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2023-11-19 07:40:52,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1354. [2023-11-19 07:40:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1131 states have (on average 1.5587975243147656) internal successors, (1763), 1131 states have internal predecessors, (1763), 213 states have call successors, (213), 9 states have call predecessors, (213), 9 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2023-11-19 07:40:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 2189 transitions. [2023-11-19 07:40:52,269 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 2189 transitions. Word has length 506 [2023-11-19 07:40:52,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:52,271 INFO L495 AbstractCegarLoop]: Abstraction has 1354 states and 2189 transitions. [2023-11-19 07:40:52,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) [2023-11-19 07:40:52,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 2189 transitions. [2023-11-19 07:40:52,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2023-11-19 07:40:52,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:52,280 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:52,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:52,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:52,497 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:52,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:52,497 INFO L85 PathProgramCache]: Analyzing trace with hash 701649968, now seen corresponding path program 1 times [2023-11-19 07:40:52,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:52,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155411388] [2023-11-19 07:40:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:52,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:52,590 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:52,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025929607] [2023-11-19 07:40:52,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:52,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:52,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:52,592 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:52,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:40:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:53,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:40:53,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-19 07:40:53,812 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:53,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:53,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155411388] [2023-11-19 07:40:53,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:53,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025929607] [2023-11-19 07:40:53,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025929607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:53,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:53,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:40:53,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503894125] [2023-11-19 07:40:53,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:53,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:40:53,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:40:53,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:40:53,816 INFO L87 Difference]: Start difference. First operand 1354 states and 2189 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:54,329 INFO L93 Difference]: Finished difference Result 3742 states and 6050 transitions. [2023-11-19 07:40:54,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:40:54,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 507 [2023-11-19 07:40:54,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:54,347 INFO L225 Difference]: With dead ends: 3742 [2023-11-19 07:40:54,347 INFO L226 Difference]: Without dead ends: 2693 [2023-11-19 07:40:54,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:54,351 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 805 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:54,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 1568 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:40:54,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2023-11-19 07:40:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 2675. [2023-11-19 07:40:54,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2675 states, 2304 states have (on average 1.5668402777777777) internal successors, (3610), 2304 states have internal predecessors, (3610), 355 states have call successors, (355), 15 states have call predecessors, (355), 15 states have return successors, (355), 355 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-19 07:40:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2675 states to 2675 states and 4320 transitions. [2023-11-19 07:40:54,692 INFO L78 Accepts]: Start accepts. Automaton has 2675 states and 4320 transitions. Word has length 507 [2023-11-19 07:40:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:54,693 INFO L495 AbstractCegarLoop]: Abstraction has 2675 states and 4320 transitions. [2023-11-19 07:40:54,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:40:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2675 states and 4320 transitions. [2023-11-19 07:40:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-11-19 07:40:54,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:54,702 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:54,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:54,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:54,925 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:54,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:54,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1208930492, now seen corresponding path program 1 times [2023-11-19 07:40:54,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:54,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419301039] [2023-11-19 07:40:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:54,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:55,002 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:55,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677736922] [2023-11-19 07:40:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:55,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:55,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:55,004 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:55,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:40:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:55,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:55,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 3318 proven. 42 refuted. 0 times theorem prover too weak. 6580 trivial. 0 not checked. [2023-11-19 07:40:55,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 168 proven. 42 refuted. 0 times theorem prover too weak. 9730 trivial. 0 not checked. [2023-11-19 07:40:56,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:56,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419301039] [2023-11-19 07:40:56,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:56,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677736922] [2023-11-19 07:40:56,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677736922] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:56,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:56,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:40:56,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618441608] [2023-11-19 07:40:56,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:56,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:40:56,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:56,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:40:56,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:40:56,111 INFO L87 Difference]: Start difference. First operand 2675 states and 4320 transitions. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-19 07:40:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:56,805 INFO L93 Difference]: Finished difference Result 5232 states and 8428 transitions. [2023-11-19 07:40:56,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:40:56,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) Word has length 508 [2023-11-19 07:40:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:56,827 INFO L225 Difference]: With dead ends: 5232 [2023-11-19 07:40:56,827 INFO L226 Difference]: Without dead ends: 2715 [2023-11-19 07:40:56,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 1008 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:40:56,834 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 785 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:56,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 1201 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:40:56,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2023-11-19 07:40:57,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 2695. [2023-11-19 07:40:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2319 states have (on average 1.5592927986200948) internal successors, (3616), 2319 states have internal predecessors, (3616), 355 states have call successors, (355), 20 states have call predecessors, (355), 20 states have return successors, (355), 355 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-19 07:40:57,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 4326 transitions. [2023-11-19 07:40:57,175 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 4326 transitions. Word has length 508 [2023-11-19 07:40:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:57,176 INFO L495 AbstractCegarLoop]: Abstraction has 2695 states and 4326 transitions. [2023-11-19 07:40:57,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-19 07:40:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 4326 transitions. [2023-11-19 07:40:57,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-11-19 07:40:57,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:57,186 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:57,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-19 07:40:57,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:40:57,406 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:57,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:57,406 INFO L85 PathProgramCache]: Analyzing trace with hash 325421502, now seen corresponding path program 1 times [2023-11-19 07:40:57,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:57,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798008944] [2023-11-19 07:40:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:57,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:57,480 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:57,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362850413] [2023-11-19 07:40:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:57,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:57,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:57,482 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:57,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:40:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:58,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:58,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 2178 proven. 24 refuted. 0 times theorem prover too weak. 7738 trivial. 0 not checked. [2023-11-19 07:40:58,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 186 proven. 24 refuted. 0 times theorem prover too weak. 9730 trivial. 0 not checked. [2023-11-19 07:40:58,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:58,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798008944] [2023-11-19 07:40:58,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:58,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362850413] [2023-11-19 07:40:58,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362850413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:58,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:58,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:40:58,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630103667] [2023-11-19 07:40:58,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:58,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:40:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:58,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:40:58,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:40:58,419 INFO L87 Difference]: Start difference. First operand 2695 states and 4326 transitions. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 2 states have call successors, (79), 2 states have call predecessors, (79), 4 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-19 07:40:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:59,064 INFO L93 Difference]: Finished difference Result 5275 states and 8443 transitions. [2023-11-19 07:40:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:40:59,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 2 states have call successors, (79), 2 states have call predecessors, (79), 4 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) Word has length 508 [2023-11-19 07:40:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:59,085 INFO L225 Difference]: With dead ends: 5275 [2023-11-19 07:40:59,086 INFO L226 Difference]: Without dead ends: 2745 [2023-11-19 07:40:59,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 1008 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:40:59,093 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 429 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:59,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1211 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:40:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2023-11-19 07:40:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2715. [2023-11-19 07:40:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2334 states have (on average 1.5518423307626392) internal successors, (3622), 2334 states have internal predecessors, (3622), 355 states have call successors, (355), 25 states have call predecessors, (355), 25 states have return successors, (355), 355 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-19 07:40:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 4332 transitions. [2023-11-19 07:40:59,401 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 4332 transitions. Word has length 508 [2023-11-19 07:40:59,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:59,402 INFO L495 AbstractCegarLoop]: Abstraction has 2715 states and 4332 transitions. [2023-11-19 07:40:59,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 2 states have call successors, (79), 2 states have call predecessors, (79), 4 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-19 07:40:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 4332 transitions. [2023-11-19 07:40:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-11-19 07:40:59,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:59,410 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:59,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:59,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:59,625 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:59,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:59,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2092482564, now seen corresponding path program 1 times [2023-11-19 07:40:59,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:59,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122815002] [2023-11-19 07:40:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:59,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:59,731 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:59,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844062547] [2023-11-19 07:40:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:59,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:59,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:59,733 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:59,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 07:41:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:00,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:41:00,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 4950 proven. 90 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-19 07:41:00,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 120 proven. 90 refuted. 0 times theorem prover too weak. 9730 trivial. 0 not checked. [2023-11-19 07:41:00,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:00,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122815002] [2023-11-19 07:41:00,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:41:00,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844062547] [2023-11-19 07:41:00,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844062547] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:00,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:41:00,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:41:00,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551743316] [2023-11-19 07:41:00,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:00,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:41:00,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:00,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:41:00,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:41:00,967 INFO L87 Difference]: Start difference. First operand 2715 states and 4332 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 3 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2023-11-19 07:41:01,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:01,593 INFO L93 Difference]: Finished difference Result 5255 states and 8356 transitions. [2023-11-19 07:41:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:41:01,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 3 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) Word has length 508 [2023-11-19 07:41:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:01,613 INFO L225 Difference]: With dead ends: 5255 [2023-11-19 07:41:01,614 INFO L226 Difference]: Without dead ends: 2765 [2023-11-19 07:41:01,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 1008 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:41:01,620 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 373 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:01,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 1206 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:41:01,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2023-11-19 07:41:01,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2735. [2023-11-19 07:41:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2735 states, 2349 states have (on average 1.5440613026819923) internal successors, (3627), 2349 states have internal predecessors, (3627), 355 states have call successors, (355), 30 states have call predecessors, (355), 30 states have return successors, (355), 355 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-19 07:41:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 4337 transitions. [2023-11-19 07:41:01,902 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 4337 transitions. Word has length 508 [2023-11-19 07:41:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:01,903 INFO L495 AbstractCegarLoop]: Abstraction has 2735 states and 4337 transitions. [2023-11-19 07:41:01,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 3 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2023-11-19 07:41:01,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 4337 transitions. [2023-11-19 07:41:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2023-11-19 07:41:01,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:01,910 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:01,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:02,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:02,133 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:02,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:02,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1616166669, now seen corresponding path program 1 times [2023-11-19 07:41:02,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:02,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739760242] [2023-11-19 07:41:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:02,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:02,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:41:02,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844132305] [2023-11-19 07:41:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:02,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:02,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:02,249 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:02,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 07:41:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:02,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:41:02,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5010 proven. 96 refuted. 0 times theorem prover too weak. 4834 trivial. 0 not checked. [2023-11-19 07:41:03,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 114 proven. 96 refuted. 0 times theorem prover too weak. 9730 trivial. 0 not checked. [2023-11-19 07:41:03,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:03,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739760242] [2023-11-19 07:41:03,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:41:03,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844132305] [2023-11-19 07:41:03,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844132305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:03,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:41:03,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:41:03,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557694489] [2023-11-19 07:41:03,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:03,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:41:03,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:03,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:41:03,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:41:03,420 INFO L87 Difference]: Start difference. First operand 2735 states and 4337 transitions. Second operand has 8 states, 8 states have (on average 26.625) internal successors, (213), 8 states have internal predecessors, (213), 3 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) [2023-11-19 07:41:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:04,050 INFO L93 Difference]: Finished difference Result 5329 states and 8429 transitions. [2023-11-19 07:41:04,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:41:04,052 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.625) internal successors, (213), 8 states have internal predecessors, (213), 3 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) Word has length 509 [2023-11-19 07:41:04,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:04,066 INFO L225 Difference]: With dead ends: 5329 [2023-11-19 07:41:04,066 INFO L226 Difference]: Without dead ends: 2785 [2023-11-19 07:41:04,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 1010 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:41:04,072 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 717 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:04,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 1187 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:41:04,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-11-19 07:41:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2755. [2023-11-19 07:41:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2364 states have (on average 1.5363790186125212) internal successors, (3632), 2364 states have internal predecessors, (3632), 355 states have call successors, (355), 35 states have call predecessors, (355), 35 states have return successors, (355), 355 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-19 07:41:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4342 transitions. [2023-11-19 07:41:04,356 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4342 transitions. Word has length 509 [2023-11-19 07:41:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:04,357 INFO L495 AbstractCegarLoop]: Abstraction has 2755 states and 4342 transitions. [2023-11-19 07:41:04,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.625) internal successors, (213), 8 states have internal predecessors, (213), 3 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) [2023-11-19 07:41:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4342 transitions. [2023-11-19 07:41:04,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2023-11-19 07:41:04,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:04,365 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:04,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:04,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:41:04,589 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:04,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:04,589 INFO L85 PathProgramCache]: Analyzing trace with hash -977766993, now seen corresponding path program 1 times [2023-11-19 07:41:04,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:04,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605914900] [2023-11-19 07:41:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:04,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:04,664 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:41:04,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036626454] [2023-11-19 07:41:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:04,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:04,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:04,666 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:04,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 07:41:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:05,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 1299 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 07:41:05,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-19 07:41:06,108 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:41:06,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:06,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605914900] [2023-11-19 07:41:06,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:41:06,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036626454] [2023-11-19 07:41:06,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036626454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:06,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:06,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 07:41:06,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074471098] [2023-11-19 07:41:06,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:06,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:41:06,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:41:06,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:41:06,113 INFO L87 Difference]: Start difference. First operand 2755 states and 4342 transitions. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 9 states have internal predecessors, (158), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:41:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:08,306 INFO L93 Difference]: Finished difference Result 10794 states and 17036 transitions. [2023-11-19 07:41:08,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:41:08,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 9 states have internal predecessors, (158), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 510 [2023-11-19 07:41:08,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:08,333 INFO L225 Difference]: With dead ends: 10794 [2023-11-19 07:41:08,333 INFO L226 Difference]: Without dead ends: 8218 [2023-11-19 07:41:08,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:41:08,342 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 2806 mSDsluCounter, 3674 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2806 SdHoareTripleChecker+Valid, 4311 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:08,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2806 Valid, 4311 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 07:41:08,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8218 states. [2023-11-19 07:41:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8218 to 5762. [2023-11-19 07:41:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5762 states, 5138 states have (on average 1.5488516932658623) internal successors, (7958), 5142 states have internal predecessors, (7958), 567 states have call successors, (567), 56 states have call predecessors, (567), 56 states have return successors, (567), 563 states have call predecessors, (567), 567 states have call successors, (567) [2023-11-19 07:41:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5762 states to 5762 states and 9092 transitions. [2023-11-19 07:41:08,967 INFO L78 Accepts]: Start accepts. Automaton has 5762 states and 9092 transitions. Word has length 510 [2023-11-19 07:41:08,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:08,968 INFO L495 AbstractCegarLoop]: Abstraction has 5762 states and 9092 transitions. [2023-11-19 07:41:08,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 9 states have internal predecessors, (158), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-19 07:41:08,968 INFO L276 IsEmpty]: Start isEmpty. Operand 5762 states and 9092 transitions. [2023-11-19 07:41:08,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2023-11-19 07:41:08,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:08,981 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:09,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f661845-8135-4128-9968-14ff3f4c2430/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0