./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/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_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/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_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/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 c28ec531d32a995842654b11d319d79f5f6e1bd0d3e33d9bd3cc173d0787760c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:59:51,418 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:59:51,507 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:59:51,513 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:59:51,514 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:59:51,538 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:59:51,539 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:59:51,540 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:59:51,541 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:59:51,542 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:59:51,543 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:59:51,543 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:59:51,544 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:59:51,545 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:59:51,545 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:59:51,546 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:59:51,546 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:59:51,547 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:59:51,548 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:59:51,548 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:59:51,549 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:59:51,550 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:59:51,550 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:59:51,551 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:59:51,552 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:59:51,552 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:59:51,553 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:59:51,553 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:59:51,554 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:51,554 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:59:51,555 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:59:51,555 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:59:51,556 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:59:51,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:59:51,557 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:59:51,557 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:59:51,558 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:59:51,558 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:59:51,559 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:59:51,559 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_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c28ec531d32a995842654b11d319d79f5f6e1bd0d3e33d9bd3cc173d0787760c [2023-11-19 07:59:51,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:59:51,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:59:51,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:59:51,949 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:59:51,951 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:59:51,952 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-fpi/ifeqn3.c [2023-11-19 07:59:55,235 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:59:55,448 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:59:55,448 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/sv-benchmarks/c/array-fpi/ifeqn3.c [2023-11-19 07:59:55,456 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/data/c2c1f6d20/7011618507364ca5abcbef86d83ab4fb/FLAGa534d2872 [2023-11-19 07:59:55,470 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/data/c2c1f6d20/7011618507364ca5abcbef86d83ab4fb [2023-11-19 07:59:55,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:59:55,475 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:59:55,476 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:55,476 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:59:55,481 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:59:55,482 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,483 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5058c2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55, skipping insertion in model container [2023-11-19 07:59:55,483 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,504 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:59:55,668 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_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/sv-benchmarks/c/array-fpi/ifeqn3.c[589,602] [2023-11-19 07:59:55,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:55,708 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:59:55,722 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_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/sv-benchmarks/c/array-fpi/ifeqn3.c[589,602] [2023-11-19 07:59:55,733 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:55,749 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:59:55,750 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55 WrapperNode [2023-11-19 07:59:55,750 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:55,751 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:55,751 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:59:55,752 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:59:55,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,776 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,800 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-11-19 07:59:55,800 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:55,801 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:59:55,801 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:59:55,801 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:59:55,812 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,815 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,820 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,826 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,830 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,832 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,833 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,835 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:59:55,836 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:59:55,837 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:59:55,837 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:59:55,838 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:55,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:55,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:59:55,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:59:55,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:59:55,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:59:55,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:59:55,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:59:55,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:59:55,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:59:55,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:59:56,035 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:59:56,038 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:59:56,320 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:59:56,328 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:59:56,328 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:59:56,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:56 BoogieIcfgContainer [2023-11-19 07:59:56,332 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:59:56,335 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:59:56,335 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:59:56,339 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:59:56,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:59:55" (1/3) ... [2023-11-19 07:59:56,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c83afa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:56, skipping insertion in model container [2023-11-19 07:59:56,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55" (2/3) ... [2023-11-19 07:59:56,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c83afa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:56, skipping insertion in model container [2023-11-19 07:59:56,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:56" (3/3) ... [2023-11-19 07:59:56,342 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn3.c [2023-11-19 07:59:56,361 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:59:56,361 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:59:56,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:59:56,413 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;@40cf2776, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:59:56,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:59:56,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 07:59:56,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:56,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:56,429 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:56,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:56,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2023-11-19 07:59:56,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:56,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228494338] [2023-11-19 07:59:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:56,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:56,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:56,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228494338] [2023-11-19 07:59:56,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:59:56,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040722757] [2023-11-19 07:59:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:56,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:56,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:56,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:56,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:59:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:56,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:59:56,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:56,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:56,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040722757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:56,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:56,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:59:56,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885403363] [2023-11-19 07:59:56,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:56,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:59:56,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:56,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:59:56,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:59:56,801 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:56,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:56,816 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2023-11-19 07:59:56,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:59:56,818 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 07:59:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:56,825 INFO L225 Difference]: With dead ends: 42 [2023-11-19 07:59:56,825 INFO L226 Difference]: Without dead ends: 19 [2023-11-19 07:59:56,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 07:59:56,831 INFO L413 NwaCegarLoop]: 28 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, 28 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 07:59:56,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:59:56,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-19 07:59:56,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-19 07:59:56,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-19 07:59:56,864 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-11-19 07:59:56,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:56,864 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-19 07:59:56,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-19 07:59:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 07:59:56,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:56,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:56,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:57,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:57,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:57,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:57,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2023-11-19 07:59:57,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:57,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861907812] [2023-11-19 07:59:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:57,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:57,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:57,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861907812] [2023-11-19 07:59:57,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:59:57,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125129023] [2023-11-19 07:59:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:57,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:57,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:57,143 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:57,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:59:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:57,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:59:57,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:57,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:57,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125129023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:57,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:57,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:59:57,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482488555] [2023-11-19 07:59:57,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:57,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:59:57,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:57,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:59:57,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:59:57,310 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:57,398 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-11-19 07:59:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:59:57,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 07:59:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:57,400 INFO L225 Difference]: With dead ends: 42 [2023-11-19 07:59:57,400 INFO L226 Difference]: Without dead ends: 31 [2023-11-19 07:59:57,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:59:57,402 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:57,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:59:57,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-19 07:59:57,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2023-11-19 07:59:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-19 07:59:57,411 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-11-19 07:59:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:57,411 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-19 07:59:57,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-19 07:59:57,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:59:57,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:57,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:57,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 07:59:57,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:57,624 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:57,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:57,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2023-11-19 07:59:57,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:57,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692430364] [2023-11-19 07:59:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:57,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:57,667 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:59:57,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65307104] [2023-11-19 07:59:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:57,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:57,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:57,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:57,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:59:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:57,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:59:57,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:57,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 07:59:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:59:57,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:57,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:57,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692430364] [2023-11-19 07:59:57,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:59:57,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65307104] [2023-11-19 07:59:57,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65307104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:57,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:57,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:59:57,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304765557] [2023-11-19 07:59:57,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:57,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:59:57,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:57,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:59:57,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:59:57,940 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:58,069 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-11-19 07:59:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:59:58,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 07:59:58,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:58,071 INFO L225 Difference]: With dead ends: 37 [2023-11-19 07:59:58,071 INFO L226 Difference]: Without dead ends: 35 [2023-11-19 07:59:58,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:59:58,077 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:58,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 66 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:59:58,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-19 07:59:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2023-11-19 07:59:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-19 07:59:58,089 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2023-11-19 07:59:58,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:58,090 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-19 07:59:58,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-19 07:59:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:59:58,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:58,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:58,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:58,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 07:59:58,314 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:58,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:58,314 INFO L85 PathProgramCache]: Analyzing trace with hash -217194585, now seen corresponding path program 1 times [2023-11-19 07:59:58,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:58,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981446010] [2023-11-19 07:59:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:58,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:58,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:58,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981446010] [2023-11-19 07:59:58,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:59:58,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681514538] [2023-11-19 07:59:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:58,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:58,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:58,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:58,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:59:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:58,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:59:58,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:59:58,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:58,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681514538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:58,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:58,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:59:58,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925444640] [2023-11-19 07:59:58,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:58,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:58,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:58,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:58,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:58,484 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:58,542 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-11-19 07:59:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:58,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 07:59:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:58,548 INFO L225 Difference]: With dead ends: 55 [2023-11-19 07:59:58,549 INFO L226 Difference]: Without dead ends: 35 [2023-11-19 07:59:58,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 07:59:58,554 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:58,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:59:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-19 07:59:58,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2023-11-19 07:59:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-11-19 07:59:58,577 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2023-11-19 07:59:58,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:58,578 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-11-19 07:59:58,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,578 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-11-19 07:59:58,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 07:59:58,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:58,580 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:58,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:58,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:58,791 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:58,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:58,792 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2023-11-19 07:59:58,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:58,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421624487] [2023-11-19 07:59:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:58,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:58,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:59:58,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361195079] [2023-11-19 07:59:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:58,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:58,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:58,872 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:58,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:59:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:58,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:59:58,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:59,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:59,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:59,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421624487] [2023-11-19 07:59:59,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:59:59,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361195079] [2023-11-19 07:59:59,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361195079] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:59,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:59:59,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-19 07:59:59,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354011814] [2023-11-19 07:59:59,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:59,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:59:59,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:59,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:59:59,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:59:59,055 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:59,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:59,197 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2023-11-19 07:59:59,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:59:59,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-19 07:59:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:59,199 INFO L225 Difference]: With dead ends: 70 [2023-11-19 07:59:59,199 INFO L226 Difference]: Without dead ends: 43 [2023-11-19 07:59:59,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:59:59,201 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:59,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 38 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:59:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-19 07:59:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2023-11-19 07:59:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-11-19 07:59:59,208 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2023-11-19 07:59:59,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:59,208 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-11-19 07:59:59,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-11-19 07:59:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 07:59:59,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:59,209 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:59,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:59,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:59,424 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:59,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:59,425 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2023-11-19 07:59:59,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:59,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537520217] [2023-11-19 07:59:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:59,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:59,466 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:59:59,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546271222] [2023-11-19 07:59:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:59,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:59,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:59,477 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:59,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:59:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:59,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 07:59:59,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:59,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 07:59:59,686 INFO L349 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2023-11-19 07:59:59,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 39 [2023-11-19 07:59:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:59,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:00,673 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 08:00:00,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 1 [2023-11-19 08:00:00,687 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 08:00:00,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 1 [2023-11-19 08:00:00,702 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 08:00:00,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 1 [2023-11-19 08:00:00,720 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:00:00,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 117 [2023-11-19 08:00:00,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2023-11-19 08:00:00,785 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:00:00,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 109 [2023-11-19 08:00:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:00:00,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:00,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537520217] [2023-11-19 08:00:00,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:00,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546271222] [2023-11-19 08:00:00,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546271222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:00,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:00:00,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-19 08:00:00,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353206812] [2023-11-19 08:00:00,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:00,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:00:00,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:00,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:00:00,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:00:00,864 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:03,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 08:00:04,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:04,655 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2023-11-19 08:00:04,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 08:00:04,656 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-19 08:00:04,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:04,657 INFO L225 Difference]: With dead ends: 112 [2023-11-19 08:00:04,657 INFO L226 Difference]: Without dead ends: 92 [2023-11-19 08:00:04,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2023-11-19 08:00:04,659 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:04,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 119 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 230 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2023-11-19 08:00:04,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-19 08:00:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 40. [2023-11-19 08:00:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-11-19 08:00:04,674 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2023-11-19 08:00:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:04,675 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-11-19 08:00:04,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-11-19 08:00:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 08:00:04,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:04,677 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:04,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:04,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:04,890 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:04,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:04,891 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2023-11-19 08:00:04,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:04,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771138655] [2023-11-19 08:00:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:04,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:04,917 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:04,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989375770] [2023-11-19 08:00:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:04,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:04,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:04,919 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:04,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:00:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:05,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-19 08:00:05,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:05,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 08:00:05,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 08:00:05,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 08:00:05,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-19 08:00:05,386 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 08:00:05,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-19 08:00:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:05,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:06,250 WARN L854 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_main_~i~0#1| 0) (let ((.cse0 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (* .cse0 8))) (and (or (< 2147483647 .cse0) (forall ((v_ArrVal_124 (Array Int Int))) (or (not (= v_ArrVal_124 (let ((.cse2 (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse1 .cse2 (select v_ArrVal_124 .cse2))))) (= 6 (select (select (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_124))) (store .cse4 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse4 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (or (< .cse0 2147483648) (forall ((v_ArrVal_124 (Array Int Int))) (or (not (= v_ArrVal_124 (let ((.cse5 (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (store .cse1 .cse5 (select v_ArrVal_124 .cse5))))) (= 6 (select (select (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_124))) (store .cse6 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse6 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))))))))) is different from false [2023-11-19 08:00:06,362 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse7 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (or (let ((.cse4 (mod .cse7 4294967296))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (* .cse4 8))) (and (or (forall ((v_ArrVal_124 (Array Int Int))) (or (not (= v_ArrVal_124 (let ((.cse1 (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse0 .cse1 (select v_ArrVal_124 .cse1))))) (= 6 (select (select (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_124))) (store .cse3 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (< 2147483647 .cse4)) (or (forall ((v_ArrVal_124 (Array Int Int))) (or (not (= v_ArrVal_124 (let ((.cse5 (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (store .cse0 .cse5 (select v_ArrVal_124 .cse5))))) (= 6 (select (select (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_124))) (store .cse6 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse6 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (< .cse4 2147483648))))) (= .cse7 0))) is different from false [2023-11-19 08:00:06,404 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:00:06,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 92 [2023-11-19 08:00:06,456 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 08:00:06,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 90 [2023-11-19 08:00:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-19 08:00:06,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:06,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771138655] [2023-11-19 08:00:06,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:06,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989375770] [2023-11-19 08:00:06,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989375770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:06,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:00:06,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2023-11-19 08:00:06,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270097817] [2023-11-19 08:00:06,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:06,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 08:00:06,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:06,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 08:00:06,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=348, Unknown=2, NotChecked=78, Total=506 [2023-11-19 08:00:06,543 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:09,527 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2023-11-19 08:00:09,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-19 08:00:09,528 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-19 08:00:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:09,529 INFO L225 Difference]: With dead ends: 142 [2023-11-19 08:00:09,529 INFO L226 Difference]: Without dead ends: 140 [2023-11-19 08:00:09,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=451, Invalid=1535, Unknown=2, NotChecked=174, Total=2162 [2023-11-19 08:00:09,531 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 309 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:09,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 200 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 340 Invalid, 0 Unknown, 240 Unchecked, 0.7s Time] [2023-11-19 08:00:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-19 08:00:09,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 68. [2023-11-19 08:00:09,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:09,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2023-11-19 08:00:09,558 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 28 [2023-11-19 08:00:09,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:09,558 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2023-11-19 08:00:09,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:09,559 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2023-11-19 08:00:09,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 08:00:09,560 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:09,560 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:09,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-19 08:00:09,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:09,776 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:09,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:09,776 INFO L85 PathProgramCache]: Analyzing trace with hash 939270440, now seen corresponding path program 2 times [2023-11-19 08:00:09,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:09,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046139862] [2023-11-19 08:00:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:09,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:09,827 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:09,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606763011] [2023-11-19 08:00:09,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:00:09,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:09,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:09,834 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:09,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:00:09,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:00:09,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:09,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:09,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:00:10,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:00:10,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:10,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046139862] [2023-11-19 08:00:10,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:10,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606763011] [2023-11-19 08:00:10,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606763011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:10,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:00:10,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-19 08:00:10,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210019721] [2023-11-19 08:00:10,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:10,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:00:10,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:10,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:00:10,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:00:10,160 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:10,520 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2023-11-19 08:00:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:00:10,521 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-19 08:00:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:10,523 INFO L225 Difference]: With dead ends: 156 [2023-11-19 08:00:10,524 INFO L226 Difference]: Without dead ends: 95 [2023-11-19 08:00:10,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:00:10,527 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 72 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:10,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 104 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:00:10,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-19 08:00:10,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 58. [2023-11-19 08:00:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2023-11-19 08:00:10,562 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 31 [2023-11-19 08:00:10,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:10,563 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2023-11-19 08:00:10,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:10,563 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2023-11-19 08:00:10,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 08:00:10,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:10,571 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:10,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:10,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:10,797 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:10,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:10,797 INFO L85 PathProgramCache]: Analyzing trace with hash 877615566, now seen corresponding path program 3 times [2023-11-19 08:00:10,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:10,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721005878] [2023-11-19 08:00:10,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:10,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:10,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:10,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823117151] [2023-11-19 08:00:10,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:00:10,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:10,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:10,860 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:10,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:00:10,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 08:00:10,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:10,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:11,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:00:11,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:00:11,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:11,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721005878] [2023-11-19 08:00:11,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:11,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823117151] [2023-11-19 08:00:11,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823117151] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:11,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:00:11,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-19 08:00:11,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702381579] [2023-11-19 08:00:11,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:11,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:00:11,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:00:11,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:00:11,206 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:11,508 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2023-11-19 08:00:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:00:11,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-19 08:00:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:11,509 INFO L225 Difference]: With dead ends: 104 [2023-11-19 08:00:11,509 INFO L226 Difference]: Without dead ends: 62 [2023-11-19 08:00:11,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-19 08:00:11,511 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:11,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 57 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:00:11,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-19 08:00:11,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2023-11-19 08:00:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-11-19 08:00:11,525 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 32 [2023-11-19 08:00:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:11,526 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-11-19 08:00:11,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,526 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-11-19 08:00:11,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 08:00:11,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:11,527 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:11,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:11,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:11,733 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:11,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:11,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1646708229, now seen corresponding path program 4 times [2023-11-19 08:00:11,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:11,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420179498] [2023-11-19 08:00:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:11,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:11,763 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:11,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153972280] [2023-11-19 08:00:11,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:00:11,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:11,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:11,765 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:11,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:00:11,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:00:11,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:11,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-19 08:00:11,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:12,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 08:00:12,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 08:00:12,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 08:00:12,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 08:00:12,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-19 08:00:12,356 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 08:00:12,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-19 08:00:12,464 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-11-19 08:00:12,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 47 [2023-11-19 08:00:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:12,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:15,627 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (* .cse4 8))) (and (or (forall ((v_ArrVal_217 (Array Int Int))) (or (not (= v_ArrVal_217 (let ((.cse1 (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (store .cse0 .cse1 (select v_ArrVal_217 .cse1))))) (= (select (select (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_217))) (store .cse3 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 6))) (< .cse4 2147483648)) (or (forall ((v_ArrVal_217 (Array Int Int))) (or (= (select (select (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_217))) (store .cse5 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse5 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 6) (not (= v_ArrVal_217 (let ((.cse6 (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse0 .cse6 (select v_ArrVal_217 .cse6))))))) (< 2147483647 .cse4))))) is different from false [2023-11-19 08:00:16,126 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (* .cse0 8))) (and (or (< 2147483647 .cse0) (forall ((v_ArrVal_217 (Array Int Int))) (or (= (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_217))) (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 6) (not (= v_ArrVal_217 (let ((.cse3 (+ .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse2 .cse3 (select v_ArrVal_217 .cse3)))))))) (or (forall ((v_ArrVal_217 (Array Int Int))) (or (= (select (select (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_217))) (store .cse5 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse5 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 6) (not (= v_ArrVal_217 (let ((.cse6 (+ .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (store .cse2 .cse6 (select v_ArrVal_217 .cse6))))))) (< .cse0 2147483648))))) is different from false [2023-11-19 08:00:18,485 WARN L854 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_main_~i~0#1| 0) (let ((.cse13 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse9 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (.cse14 (* .cse13 8))) (let ((.cse0 (< 2147483647 .cse13)) (.cse2 (+ .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (+ .cse14 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse5 (< .cse13 2147483648)) (.cse8 (* .cse9 8))) (and (or (let ((.cse3 (+ .cse8 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (and (or .cse0 (forall ((v_ArrVal_217 (Array Int Int))) (or (not (= v_ArrVal_217 (store (store .cse1 .cse2 (select v_ArrVal_217 .cse2)) .cse3 (select v_ArrVal_217 .cse3)))) (= (select (select (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_217))) (store .cse4 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse4 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 6)))) (or .cse5 (forall ((v_ArrVal_217 (Array Int Int))) (or (not (= v_ArrVal_217 (store (store .cse1 .cse6 (select v_ArrVal_217 .cse6)) .cse3 (select v_ArrVal_217 .cse3)))) (= (select (select (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_217))) (store .cse7 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse7 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 6)))))) (< .cse9 2147483648)) (or (< 2147483647 .cse9) (let ((.cse11 (+ .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or .cse0 (forall ((v_ArrVal_217 (Array Int Int))) (or (= (select (select (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_217))) (store .cse10 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse10 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 6) (not (= v_ArrVal_217 (store (store .cse1 .cse2 (select v_ArrVal_217 .cse2)) .cse11 (select v_ArrVal_217 .cse11))))))) (or (forall ((v_ArrVal_217 (Array Int Int))) (or (= (select (select (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_217))) (store .cse12 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse12 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 6) (not (= (store (store .cse1 .cse6 (select v_ArrVal_217 .cse6)) .cse11 (select v_ArrVal_217 .cse11)) v_ArrVal_217)))) .cse5))))))))) is different from false [2023-11-19 08:00:20,858 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (or (= .cse0 0) (let ((.cse15 (mod .cse0 4294967296))) (let ((.cse1 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse14 (* .cse15 8))) (let ((.cse7 (+ .cse14 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse9 (< .cse15 2147483648)) (.cse6 (< 2147483647 .cse15)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse10 (* 8 .cse1))) (and (or (< .cse1 2147483648) (let ((.cse5 (+ .cse10 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (and (or (forall ((v_ArrVal_217 (Array Int Int))) (or (= (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_217))) (store .cse2 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 6) (not (= v_ArrVal_217 (store (store .cse3 .cse4 (select v_ArrVal_217 .cse4)) .cse5 (select v_ArrVal_217 .cse5)))))) .cse6) (or (forall ((v_ArrVal_217 (Array Int Int))) (or (not (= v_ArrVal_217 (store (store .cse3 .cse7 (select v_ArrVal_217 .cse7)) .cse5 (select v_ArrVal_217 .cse5)))) (= (select (select (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_217))) (store .cse8 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse8 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 6))) .cse9)))) (or (let ((.cse12 (+ .cse10 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (forall ((v_ArrVal_217 (Array Int Int))) (or (= (select (select (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_217))) (store .cse11 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse11 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 6) (not (= v_ArrVal_217 (store (store .cse3 .cse7 (select v_ArrVal_217 .cse7)) .cse12 (select v_ArrVal_217 .cse12)))))) .cse9) (or .cse6 (forall ((v_ArrVal_217 (Array Int Int))) (or (not (= v_ArrVal_217 (store (store .cse3 .cse4 (select v_ArrVal_217 .cse4)) .cse12 (select v_ArrVal_217 .cse12)))) (= (select (select (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_217))) (store .cse13 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse13 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 6)))))) (< 2147483647 .cse1)))))))) is different from false [2023-11-19 08:00:20,905 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 08:00:20,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 85 [2023-11-19 08:00:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2023-11-19 08:00:20,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:20,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420179498] [2023-11-19 08:00:20,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:20,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153972280] [2023-11-19 08:00:20,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153972280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:20,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:00:20,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2023-11-19 08:00:20,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95948091] [2023-11-19 08:00:20,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:20,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-19 08:00:20,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:20,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 08:00:20,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=534, Unknown=4, NotChecked=204, Total=870 [2023-11-19 08:00:20,988 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:39,582 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2023-11-19 08:00:39,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-19 08:00:39,582 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-19 08:00:39,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:39,583 INFO L225 Difference]: With dead ends: 163 [2023-11-19 08:00:39,583 INFO L226 Difference]: Without dead ends: 161 [2023-11-19 08:00:39,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=679, Invalid=2525, Unknown=4, NotChecked=452, Total=3660 [2023-11-19 08:00:39,586 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 391 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:39,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 312 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 549 Invalid, 0 Unknown, 598 Unchecked, 4.1s Time] [2023-11-19 08:00:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-19 08:00:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 70. [2023-11-19 08:00:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2023-11-19 08:00:39,612 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 34 [2023-11-19 08:00:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:39,613 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2023-11-19 08:00:39,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2023-11-19 08:00:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-19 08:00:39,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:39,614 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:39,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:39,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:00:39,820 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:39,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:39,821 INFO L85 PathProgramCache]: Analyzing trace with hash -187195163, now seen corresponding path program 2 times [2023-11-19 08:00:39,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:39,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858830511] [2023-11-19 08:00:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:39,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:39,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:39,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401586975] [2023-11-19 08:00:39,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:00:39,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:39,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:39,866 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:39,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:00:39,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:00:39,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:39,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:00:39,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:00:40,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:00:40,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:40,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858830511] [2023-11-19 08:00:40,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:40,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401586975] [2023-11-19 08:00:40,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401586975] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:40,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:00:40,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-11-19 08:00:40,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161104399] [2023-11-19 08:00:40,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:40,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:00:40,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:40,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:00:40,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:00:40,255 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:40,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:40,603 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2023-11-19 08:00:40,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 08:00:40,604 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-19 08:00:40,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:40,605 INFO L225 Difference]: With dead ends: 133 [2023-11-19 08:00:40,605 INFO L226 Difference]: Without dead ends: 104 [2023-11-19 08:00:40,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:00:40,606 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 108 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:40,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 87 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:00:40,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-19 08:00:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2023-11-19 08:00:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2023-11-19 08:00:40,639 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 36 [2023-11-19 08:00:40,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:40,639 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2023-11-19 08:00:40,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:40,640 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2023-11-19 08:00:40,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 08:00:40,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:40,641 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:40,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:40,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 08:00:40,843 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:40,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:40,844 INFO L85 PathProgramCache]: Analyzing trace with hash 180276683, now seen corresponding path program 5 times [2023-11-19 08:00:40,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:40,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182992046] [2023-11-19 08:00:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:40,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:40,865 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:40,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540693173] [2023-11-19 08:00:40,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:00:40,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:40,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:40,866 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:40,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 08:00:41,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-19 08:00:41,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:41,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:00:41,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:00:41,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:00:41,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182992046] [2023-11-19 08:00:41,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540693173] [2023-11-19 08:00:41,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540693173] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:41,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:00:41,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-11-19 08:00:41,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432882939] [2023-11-19 08:00:41,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:41,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:00:41,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:41,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:00:41,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:00:41,600 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:42,149 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2023-11-19 08:00:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 08:00:42,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-19 08:00:42,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:42,151 INFO L225 Difference]: With dead ends: 106 [2023-11-19 08:00:42,151 INFO L226 Difference]: Without dead ends: 93 [2023-11-19 08:00:42,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-11-19 08:00:42,153 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 125 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:42,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 124 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:00:42,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-19 08:00:42,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2023-11-19 08:00:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:42,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2023-11-19 08:00:42,184 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 37 [2023-11-19 08:00:42,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:42,184 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2023-11-19 08:00:42,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:42,184 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2023-11-19 08:00:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 08:00:42,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:42,185 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:42,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:42,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 08:00:42,392 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:42,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:42,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 6 times [2023-11-19 08:00:42,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:42,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341417484] [2023-11-19 08:00:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:42,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:42,410 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:42,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976752618] [2023-11-19 08:00:42,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 08:00:42,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:42,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:42,412 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:42,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e6a214-13a7-40e7-bb0c-7a250da6a8c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 08:00:42,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-19 08:00:42,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:42,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-19 08:00:42,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:42,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 08:00:42,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 08:00:42,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-19 08:00:43,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-19 08:00:43,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-11-19 08:00:43,307 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-19 08:00:43,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 38 [2023-11-19 08:00:43,482 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-11-19 08:00:43,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-19 08:00:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:44,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:51,111 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (* .cse0 8)) (.cse7 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse8 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (< 2147483647 .cse0) (forall ((v_ArrVal_335 (Array Int Int))) (or (not (= v_ArrVal_335 (let ((.cse2 (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse1 .cse2 (select v_ArrVal_335 .cse2))))) (= 18 (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_335))) (let ((.cse6 (store (select .cse5 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~b~0#1.base| .cse6) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse6 .cse7 (+ .cse4 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))))))))) (or (forall ((v_ArrVal_335 (Array Int Int))) (or (not (= v_ArrVal_335 (let ((.cse9 (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (store .cse1 .cse9 (select v_ArrVal_335 .cse9))))) (= 18 (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_335))) (let ((.cse12 (store (select .cse11 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse10 (select (select (store .cse11 |c_ULTIMATE.start_main_~b~0#1.base| .cse12) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse10 (select (select (store .cse11 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse12 .cse7 (+ .cse10 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8)))))))) (< .cse0 2147483648))))) is different from false [2023-11-19 08:00:53,269 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse8 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) (let ((.cse3 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse4 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse7 (* .cse8 8))) (and (or (forall ((v_ArrVal_335 (Array Int Int))) (or (= 18 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_335))) (let ((.cse2 (store (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse2 .cse3 (+ .cse0 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4)))))) (not (= (let ((.cse6 (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (store .cse5 .cse6 (select v_ArrVal_335 .cse6))) v_ArrVal_335)))) (< .cse8 2147483648)) (or (forall ((v_ArrVal_335 (Array Int Int))) (or (= 18 (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_335))) (let ((.cse11 (store (select .cse10 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse9 (select (select (store .cse10 |c_ULTIMATE.start_main_~b~0#1.base| .cse11) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse9 (select (select (store .cse10 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse11 .cse3 (+ .cse9 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4)))))) (not (= v_ArrVal_335 (let ((.cse12 (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse5 .cse12 (select v_ArrVal_335 .cse12))))))) (< 2147483647 .cse8))))) is different from false