/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 02:07:01,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 02:07:01,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 02:07:01,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 02:07:01,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 02:07:01,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 02:07:01,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 02:07:01,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 02:07:01,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 02:07:01,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 02:07:01,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 02:07:01,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 02:07:01,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 02:07:01,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 02:07:01,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 02:07:01,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 02:07:01,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 02:07:01,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 02:07:01,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 02:07:01,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 02:07:01,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 02:07:01,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 02:07:01,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 02:07:01,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 02:07:01,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 02:07:01,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 02:07:01,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 02:07:01,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 02:07:01,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 02:07:01,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 02:07:01,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 02:07:01,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 02:07:01,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 02:07:01,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 02:07:01,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 02:07:01,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 02:07:01,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 02:07:01,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 02:07:01,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 02:07:01,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 02:07:01,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 02:07:01,915 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 02:07:01,928 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 02:07:01,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 02:07:01,928 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 02:07:01,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 02:07:01,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 02:07:01,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 02:07:01,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 02:07:01,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 02:07:01,929 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 02:07:01,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 02:07:01,930 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 02:07:01,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 02:07:01,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 02:07:01,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 02:07:01,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 02:07:01,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 02:07:01,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 02:07:01,931 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 02:07:01,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 02:07:01,931 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 02:07:01,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 02:07:01,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 02:07:01,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 02:07:01,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 02:07:01,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:07:01,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 02:07:01,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 02:07:01,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 02:07:01,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 02:07:01,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 02:07:01,932 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 02:07:01,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 02:07:01,932 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 02:07:01,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 02:07:01,933 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 02:07:01,933 INFO L138 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 02:07:02,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 02:07:02,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 02:07:02,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 02:07:02,115 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 02:07:02,117 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 02:07:02,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2023-04-02 02:07:02,913 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 02:07:03,065 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 02:07:03,066 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2023-04-02 02:07:03,071 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c33622f5/c48f43e03c084c16bddba447ac84679f/FLAG5ed947401 [2023-04-02 02:07:03,081 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c33622f5/c48f43e03c084c16bddba447ac84679f [2023-04-02 02:07:03,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 02:07:03,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 02:07:03,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 02:07:03,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 02:07:03,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 02:07:03,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:07:03" (1/1) ... [2023-04-02 02:07:03,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@456dcd03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:03, skipping insertion in model container [2023-04-02 02:07:03,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:07:03" (1/1) ... [2023-04-02 02:07:03,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 02:07:03,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 02:07:03,195 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2023-04-02 02:07:03,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:07:03,232 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 02:07:03,242 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2023-04-02 02:07:03,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:07:03,268 INFO L208 MainTranslator]: Completed translation [2023-04-02 02:07:03,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:03 WrapperNode [2023-04-02 02:07:03,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 02:07:03,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 02:07:03,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 02:07:03,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 02:07:03,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:03" (1/1) ... [2023-04-02 02:07:03,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:03" (1/1) ... [2023-04-02 02:07:03,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:03" (1/1) ... [2023-04-02 02:07:03,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:03" (1/1) ... [2023-04-02 02:07:03,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:03" (1/1) ... [2023-04-02 02:07:03,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:03" (1/1) ... [2023-04-02 02:07:03,291 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:03" (1/1) ... [2023-04-02 02:07:03,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:03" (1/1) ... [2023-04-02 02:07:03,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 02:07:03,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 02:07:03,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 02:07:03,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 02:07:03,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:03" (1/1) ... [2023-04-02 02:07:03,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:07:03,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:03,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 02:07:03,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 02:07:03,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 02:07:03,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 02:07:03,341 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 02:07:03,341 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 02:07:03,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 02:07:03,341 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 02:07:03,341 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 02:07:03,341 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 02:07:03,341 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 02:07:03,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 02:07:03,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 02:07:03,342 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 02:07:03,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 02:07:03,342 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 02:07:03,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 02:07:03,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 02:07:03,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 02:07:03,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 02:07:03,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 02:07:03,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 02:07:03,388 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 02:07:03,389 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 02:07:03,579 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 02:07:03,583 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 02:07:03,584 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 02:07:03,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:07:03 BoogieIcfgContainer [2023-04-02 02:07:03,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 02:07:03,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 02:07:03,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 02:07:03,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 02:07:03,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:07:03" (1/3) ... [2023-04-02 02:07:03,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787174ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:07:03, skipping insertion in model container [2023-04-02 02:07:03,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:03" (2/3) ... [2023-04-02 02:07:03,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787174ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:07:03, skipping insertion in model container [2023-04-02 02:07:03,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:07:03" (3/3) ... [2023-04-02 02:07:03,591 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound10.c [2023-04-02 02:07:03,601 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 02:07:03,602 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 02:07:03,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 02:07:03,637 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@415c406e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 02:07:03,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 02:07:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 02:07:03,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 02:07:03,644 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:03,645 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:03,645 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:03,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:03,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2023-04-02 02:07:03,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:03,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209580342] [2023-04-02 02:07:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:03,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:03,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:03,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209580342] [2023-04-02 02:07:03,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 02:07:03,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57162455] [2023-04-02 02:07:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:03,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:03,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:03,737 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:03,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 02:07:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:03,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 02:07:03,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 02:07:03,871 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:07:03,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57162455] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:07:03,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:07:03,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 02:07:03,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419051890] [2023-04-02 02:07:03,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:07:03,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 02:07:03,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:03,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 02:07:03,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:07:03,910 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:07:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:03,930 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2023-04-02 02:07:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 02:07:03,933 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2023-04-02 02:07:03,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:03,939 INFO L225 Difference]: With dead ends: 71 [2023-04-02 02:07:03,939 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 02:07:03,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:07:03,947 INFO L413 NwaCegarLoop]: 50 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, 50 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 [2023-04-02 02:07:03,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:07:03,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 02:07:03,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-02 02:07:03,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 02:07:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2023-04-02 02:07:03,988 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2023-04-02 02:07:03,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:03,989 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2023-04-02 02:07:03,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:07:03,989 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2023-04-02 02:07:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 02:07:03,990 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:03,990 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:03,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:04,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 02:07:04,193 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:04,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:04,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2023-04-02 02:07:04,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:04,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493447129] [2023-04-02 02:07:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:04,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:04,208 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:04,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98327435] [2023-04-02 02:07:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:04,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:04,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:04,209 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:04,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 02:07:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:04,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 02:07:04,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 02:07:04,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:07:04,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:04,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493447129] [2023-04-02 02:07:04,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:04,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98327435] [2023-04-02 02:07:04,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98327435] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:07:04,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:07:04,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 02:07:04,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014292275] [2023-04-02 02:07:04,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:07:04,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 02:07:04,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:04,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 02:07:04,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 02:07:04,340 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:07:04,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:04,352 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2023-04-02 02:07:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 02:07:04,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2023-04-02 02:07:04,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:04,353 INFO L225 Difference]: With dead ends: 44 [2023-04-02 02:07:04,353 INFO L226 Difference]: Without dead ends: 36 [2023-04-02 02:07:04,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 02:07:04,354 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:04,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:07:04,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-02 02:07:04,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-04-02 02:07:04,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 02:07:04,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2023-04-02 02:07:04,360 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2023-04-02 02:07:04,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:04,361 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2023-04-02 02:07:04,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:07:04,361 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2023-04-02 02:07:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 02:07:04,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:04,362 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:04,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:04,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 02:07:04,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:04,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:04,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2023-04-02 02:07:04,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:04,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331495045] [2023-04-02 02:07:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:04,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:04,590 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:04,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831450261] [2023-04-02 02:07:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:04,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:04,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:04,595 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:04,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 02:07:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:04,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:07:04,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:07:04,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:07:04,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:04,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331495045] [2023-04-02 02:07:04,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:04,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831450261] [2023-04-02 02:07:04,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831450261] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:07:04,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:07:04,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-04-02 02:07:04,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942102175] [2023-04-02 02:07:04,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:04,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 02:07:04,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:04,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 02:07:04,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 02:07:04,805 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:07:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:04,901 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2023-04-02 02:07:04,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:07:04,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2023-04-02 02:07:04,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:04,905 INFO L225 Difference]: With dead ends: 53 [2023-04-02 02:07:04,905 INFO L226 Difference]: Without dead ends: 45 [2023-04-02 02:07:04,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-04-02 02:07:04,908 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 29 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:04,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 146 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:07:04,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-02 02:07:04,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2023-04-02 02:07:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 02:07:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-04-02 02:07:04,917 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2023-04-02 02:07:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:04,917 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-04-02 02:07:04,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:07:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-04-02 02:07:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 02:07:04,918 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:04,918 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:04,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:05,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:05,125 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:05,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:05,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2023-04-02 02:07:05,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:05,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471505517] [2023-04-02 02:07:05,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:05,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:05,142 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:05,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190002809] [2023-04-02 02:07:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:05,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:05,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:05,150 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:05,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 02:07:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:05,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 02:07:05,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:07:05,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 02:07:05,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:05,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471505517] [2023-04-02 02:07:05,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:05,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190002809] [2023-04-02 02:07:05,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190002809] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:07:05,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:07:05,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-04-02 02:07:05,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148512861] [2023-04-02 02:07:05,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:07:05,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:07:05,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:05,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:07:05,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-02 02:07:05,358 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 02:07:05,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:05,410 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2023-04-02 02:07:05,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:07:05,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2023-04-02 02:07:05,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:05,411 INFO L225 Difference]: With dead ends: 43 [2023-04-02 02:07:05,411 INFO L226 Difference]: Without dead ends: 41 [2023-04-02 02:07:05,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:07:05,412 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:05,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 130 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:07:05,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-02 02:07:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-04-02 02:07:05,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 02:07:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-04-02 02:07:05,419 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 36 [2023-04-02 02:07:05,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:05,419 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-04-02 02:07:05,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 02:07:05,419 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-04-02 02:07:05,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-02 02:07:05,420 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:05,420 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:05,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:05,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:05,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:05,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:05,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2023-04-02 02:07:05,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:05,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861358857] [2023-04-02 02:07:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:05,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:05,636 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:05,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486261034] [2023-04-02 02:07:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:05,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:05,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:05,638 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:05,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 02:07:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:05,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:07:05,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 02:07:05,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:07:05,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:05,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861358857] [2023-04-02 02:07:05,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:05,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486261034] [2023-04-02 02:07:05,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486261034] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:07:05,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:07:05,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 02:07:05,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344292787] [2023-04-02 02:07:05,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:07:05,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:07:05,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:05,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:07:05,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:07:05,730 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:07:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:05,752 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2023-04-02 02:07:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 02:07:05,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-04-02 02:07:05,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:05,753 INFO L225 Difference]: With dead ends: 66 [2023-04-02 02:07:05,754 INFO L226 Difference]: Without dead ends: 43 [2023-04-02 02:07:05,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:07:05,754 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:05,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:07:05,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-02 02:07:05,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-04-02 02:07:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 02:07:05,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2023-04-02 02:07:05,763 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 39 [2023-04-02 02:07:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:05,763 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2023-04-02 02:07:05,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:07:05,764 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2023-04-02 02:07:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 02:07:05,764 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:05,764 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:05,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:05,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:05,969 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:05,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:05,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2023-04-02 02:07:05,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:05,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676510803] [2023-04-02 02:07:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:05,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:05,977 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:05,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218847821] [2023-04-02 02:07:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:05,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:05,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:05,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:05,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 02:07:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:06,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 02:07:06,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:07:06,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 02:07:06,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:06,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676510803] [2023-04-02 02:07:06,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:06,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218847821] [2023-04-02 02:07:06,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218847821] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:07:06,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:07:06,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-04-02 02:07:06,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596538507] [2023-04-02 02:07:06,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:07:06,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:07:06,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:06,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:07:06,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:07:06,276 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 02:07:06,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:06,317 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2023-04-02 02:07:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:07:06,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2023-04-02 02:07:06,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:06,318 INFO L225 Difference]: With dead ends: 57 [2023-04-02 02:07:06,318 INFO L226 Difference]: Without dead ends: 55 [2023-04-02 02:07:06,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:07:06,319 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:06,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:07:06,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-02 02:07:06,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2023-04-02 02:07:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 02:07:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2023-04-02 02:07:06,326 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 41 [2023-04-02 02:07:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:06,326 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2023-04-02 02:07:06,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 02:07:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2023-04-02 02:07:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 02:07:06,327 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:06,327 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:06,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:06,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:06,532 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:06,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:06,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2023-04-02 02:07:06,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:06,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176948303] [2023-04-02 02:07:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:06,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:06,540 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:06,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278515348] [2023-04-02 02:07:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:06,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:06,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:06,541 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:06,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 02:07:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:06,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 02:07:06,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 02:07:06,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 02:07:06,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:06,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176948303] [2023-04-02 02:07:06,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:06,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278515348] [2023-04-02 02:07:06,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278515348] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:07:06,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:07:06,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2023-04-02 02:07:06,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128728853] [2023-04-02 02:07:06,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:07:06,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:07:06,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:06,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:07:06,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-02 02:07:06,762 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:07:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:06,816 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2023-04-02 02:07:06,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:07:06,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-04-02 02:07:06,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:06,819 INFO L225 Difference]: With dead ends: 61 [2023-04-02 02:07:06,819 INFO L226 Difference]: Without dead ends: 59 [2023-04-02 02:07:06,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:07:06,819 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:06,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 135 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:07:06,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-02 02:07:06,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-04-02 02:07:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 02:07:06,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2023-04-02 02:07:06,838 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 46 [2023-04-02 02:07:06,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:06,838 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2023-04-02 02:07:06,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:07:06,838 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2023-04-02 02:07:06,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 02:07:06,839 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:06,839 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:06,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:07,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:07,040 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:07,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:07,041 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2023-04-02 02:07:07,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:07,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036168547] [2023-04-02 02:07:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:07,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:07,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:07,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415632549] [2023-04-02 02:07:07,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:07,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:07,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:07,063 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:07,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 02:07:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:07,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 02:07:07,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 02:07:07,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:07,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:07,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036168547] [2023-04-02 02:07:07,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:07,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415632549] [2023-04-02 02:07:07,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415632549] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:07:07,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:07:07,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-04-02 02:07:07,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697525059] [2023-04-02 02:07:07,275 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:07,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 02:07:07,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:07,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 02:07:07,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:07:07,276 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 02:07:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:07,351 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2023-04-02 02:07:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 02:07:07,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-04-02 02:07:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:07,352 INFO L225 Difference]: With dead ends: 65 [2023-04-02 02:07:07,352 INFO L226 Difference]: Without dead ends: 63 [2023-04-02 02:07:07,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 02:07:07,352 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:07,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 135 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:07:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-02 02:07:07,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2023-04-02 02:07:07,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 02:07:07,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2023-04-02 02:07:07,361 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 51 [2023-04-02 02:07:07,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:07,361 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2023-04-02 02:07:07,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 02:07:07,361 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2023-04-02 02:07:07,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 02:07:07,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:07,362 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:07,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:07,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 02:07:07,569 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:07,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:07,569 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2023-04-02 02:07:07,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:07,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538153286] [2023-04-02 02:07:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:07,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:07,577 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:07,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953548146] [2023-04-02 02:07:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:07,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:07,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:07,578 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:07,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 02:07:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:07,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 02:07:07,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-02 02:07:07,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-02 02:07:07,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:07,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538153286] [2023-04-02 02:07:07,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:07,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953548146] [2023-04-02 02:07:07,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953548146] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:07:07,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:07:07,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-02 02:07:07,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924818166] [2023-04-02 02:07:07,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:07,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 02:07:07,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:07,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 02:07:07,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:07:07,748 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2023-04-02 02:07:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:07,863 INFO L93 Difference]: Finished difference Result 215 states and 254 transitions. [2023-04-02 02:07:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 02:07:07,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 60 [2023-04-02 02:07:07,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:07,866 INFO L225 Difference]: With dead ends: 215 [2023-04-02 02:07:07,866 INFO L226 Difference]: Without dead ends: 207 [2023-04-02 02:07:07,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:07:07,868 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 76 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:07,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 202 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:07:07,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-04-02 02:07:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 199. [2023-04-02 02:07:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 126 states have (on average 1.1904761904761905) internal successors, (150), 130 states have internal predecessors, (150), 46 states have call successors, (46), 27 states have call predecessors, (46), 26 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-04-02 02:07:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 237 transitions. [2023-04-02 02:07:07,905 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 237 transitions. Word has length 60 [2023-04-02 02:07:07,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:07,906 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 237 transitions. [2023-04-02 02:07:07,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2023-04-02 02:07:07,906 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 237 transitions. [2023-04-02 02:07:07,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-02 02:07:07,907 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:07,907 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:07,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:08,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:08,112 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:08,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:08,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2023-04-02 02:07:08,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:08,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061159074] [2023-04-02 02:07:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:08,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:08,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:08,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989756693] [2023-04-02 02:07:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:08,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:08,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:08,120 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:08,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 02:07:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:08,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 02:07:08,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-02 02:07:08,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-02 02:07:08,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:08,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061159074] [2023-04-02 02:07:08,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:08,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989756693] [2023-04-02 02:07:08,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989756693] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:07:08,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:07:08,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-04-02 02:07:08,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858458025] [2023-04-02 02:07:08,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:08,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 02:07:08,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:08,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 02:07:08,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 02:07:08,271 INFO L87 Difference]: Start difference. First operand 199 states and 237 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-02 02:07:08,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:08,439 INFO L93 Difference]: Finished difference Result 283 states and 368 transitions. [2023-04-02 02:07:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 02:07:08,439 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2023-04-02 02:07:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:08,440 INFO L225 Difference]: With dead ends: 283 [2023-04-02 02:07:08,440 INFO L226 Difference]: Without dead ends: 263 [2023-04-02 02:07:08,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-04-02 02:07:08,441 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 70 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:08,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 244 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:07:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-04-02 02:07:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 239. [2023-04-02 02:07:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 153 states have (on average 1.2222222222222223) internal successors, (187), 156 states have internal predecessors, (187), 60 states have call successors, (60), 26 states have call predecessors, (60), 25 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-04-02 02:07:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 303 transitions. [2023-04-02 02:07:08,480 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 303 transitions. Word has length 61 [2023-04-02 02:07:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:08,480 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 303 transitions. [2023-04-02 02:07:08,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-02 02:07:08,480 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 303 transitions. [2023-04-02 02:07:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-02 02:07:08,484 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:08,484 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:08,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:08,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 02:07:08,689 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:08,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:08,689 INFO L85 PathProgramCache]: Analyzing trace with hash 428029148, now seen corresponding path program 1 times [2023-04-02 02:07:08,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:08,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438039242] [2023-04-02 02:07:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:08,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:08,703 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:08,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612981407] [2023-04-02 02:07:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:08,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:08,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:08,706 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:08,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 02:07:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:08,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 02:07:08,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-02 02:07:08,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-02 02:07:08,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:08,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438039242] [2023-04-02 02:07:08,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:08,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612981407] [2023-04-02 02:07:08,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612981407] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:07:08,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:07:08,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-02 02:07:08,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327038703] [2023-04-02 02:07:08,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:08,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 02:07:08,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 02:07:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:07:08,867 INFO L87 Difference]: Start difference. First operand 239 states and 303 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2023-04-02 02:07:08,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:08,965 INFO L93 Difference]: Finished difference Result 348 states and 452 transitions. [2023-04-02 02:07:08,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 02:07:08,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 63 [2023-04-02 02:07:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:08,967 INFO L225 Difference]: With dead ends: 348 [2023-04-02 02:07:08,967 INFO L226 Difference]: Without dead ends: 252 [2023-04-02 02:07:08,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:07:08,970 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 67 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:08,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 157 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:07:08,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-04-02 02:07:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 248. [2023-04-02 02:07:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 165 states have internal predecessors, (190), 60 states have call successors, (60), 26 states have call predecessors, (60), 25 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-04-02 02:07:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 306 transitions. [2023-04-02 02:07:08,999 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 306 transitions. Word has length 63 [2023-04-02 02:07:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:09,000 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 306 transitions. [2023-04-02 02:07:09,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2023-04-02 02:07:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 306 transitions. [2023-04-02 02:07:09,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 02:07:09,001 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:09,001 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:09,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:09,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 02:07:09,208 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:09,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2023-04-02 02:07:09,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:09,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667647907] [2023-04-02 02:07:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:09,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:09,227 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:09,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691373025] [2023-04-02 02:07:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:09,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:09,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:09,228 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:09,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 02:07:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:09,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-02 02:07:09,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-04-02 02:07:09,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-02 02:07:09,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:09,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667647907] [2023-04-02 02:07:09,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:09,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691373025] [2023-04-02 02:07:09,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691373025] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:07:09,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:07:09,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-04-02 02:07:09,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923713518] [2023-04-02 02:07:09,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:09,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 02:07:09,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:09,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 02:07:09,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-04-02 02:07:09,480 INFO L87 Difference]: Start difference. First operand 248 states and 306 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 5 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2023-04-02 02:07:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:09,675 INFO L93 Difference]: Finished difference Result 334 states and 433 transitions. [2023-04-02 02:07:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 02:07:09,676 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 5 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 68 [2023-04-02 02:07:09,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:09,678 INFO L225 Difference]: With dead ends: 334 [2023-04-02 02:07:09,678 INFO L226 Difference]: Without dead ends: 328 [2023-04-02 02:07:09,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-04-02 02:07:09,679 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 33 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:09,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 285 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:07:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-04-02 02:07:09,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 295. [2023-04-02 02:07:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 204 states have internal predecessors, (233), 71 states have call successors, (71), 29 states have call predecessors, (71), 28 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2023-04-02 02:07:09,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 370 transitions. [2023-04-02 02:07:09,715 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 370 transitions. Word has length 68 [2023-04-02 02:07:09,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:09,715 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 370 transitions. [2023-04-02 02:07:09,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 5 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2023-04-02 02:07:09,716 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 370 transitions. [2023-04-02 02:07:09,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 02:07:09,716 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:09,716 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:09,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:09,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 02:07:09,928 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:09,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:09,928 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 2 times [2023-04-02 02:07:09,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:09,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523055285] [2023-04-02 02:07:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:09,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:09,934 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:09,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840124227] [2023-04-02 02:07:09,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:07:09,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:09,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:09,935 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:09,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 02:07:09,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:07:09,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:07:09,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-02 02:07:09,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 02:07:10,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:10,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:10,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523055285] [2023-04-02 02:07:10,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:10,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840124227] [2023-04-02 02:07:10,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840124227] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:07:10,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:07:10,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-04-02 02:07:10,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002769747] [2023-04-02 02:07:10,373 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:10,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 02:07:10,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:10,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 02:07:10,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-04-02 02:07:10,374 INFO L87 Difference]: Start difference. First operand 295 states and 370 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-02 02:07:10,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:10,609 INFO L93 Difference]: Finished difference Result 319 states and 397 transitions. [2023-04-02 02:07:10,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 02:07:10,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 73 [2023-04-02 02:07:10,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:10,611 INFO L225 Difference]: With dead ends: 319 [2023-04-02 02:07:10,611 INFO L226 Difference]: Without dead ends: 317 [2023-04-02 02:07:10,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-04-02 02:07:10,611 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 43 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:10,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 239 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 02:07:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-04-02 02:07:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 314. [2023-04-02 02:07:10,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 207 states have (on average 1.1932367149758454) internal successors, (247), 216 states have internal predecessors, (247), 75 states have call successors, (75), 32 states have call predecessors, (75), 31 states have return successors, (70), 65 states have call predecessors, (70), 70 states have call successors, (70) [2023-04-02 02:07:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 392 transitions. [2023-04-02 02:07:10,647 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 392 transitions. Word has length 73 [2023-04-02 02:07:10,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:10,648 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 392 transitions. [2023-04-02 02:07:10,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-02 02:07:10,648 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 392 transitions. [2023-04-02 02:07:10,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-02 02:07:10,651 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:10,652 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:10,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:10,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 02:07:10,856 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:10,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:10,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 3 times [2023-04-02 02:07:10,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:10,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405513684] [2023-04-02 02:07:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:10,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:10,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:10,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902388343] [2023-04-02 02:07:10,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:07:10,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:10,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:10,866 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:10,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 02:07:10,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 02:07:10,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:07:10,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-02 02:07:10,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-02 02:07:11,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:11,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:11,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405513684] [2023-04-02 02:07:11,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:11,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902388343] [2023-04-02 02:07:11,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902388343] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:07:11,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:07:11,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-04-02 02:07:11,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305250681] [2023-04-02 02:07:11,436 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:11,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 02:07:11,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:11,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 02:07:11,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-04-02 02:07:11,437 INFO L87 Difference]: Start difference. First operand 314 states and 392 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-02 02:07:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:12,054 INFO L93 Difference]: Finished difference Result 331 states and 408 transitions. [2023-04-02 02:07:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 02:07:12,054 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 78 [2023-04-02 02:07:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:12,055 INFO L225 Difference]: With dead ends: 331 [2023-04-02 02:07:12,055 INFO L226 Difference]: Without dead ends: 327 [2023-04-02 02:07:12,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-04-02 02:07:12,056 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 36 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:12,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 249 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 02:07:12,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-04-02 02:07:12,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 324. [2023-04-02 02:07:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 215 states have (on average 1.1813953488372093) internal successors, (254), 223 states have internal predecessors, (254), 75 states have call successors, (75), 35 states have call predecessors, (75), 33 states have return successors, (70), 65 states have call predecessors, (70), 70 states have call successors, (70) [2023-04-02 02:07:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 399 transitions. [2023-04-02 02:07:12,083 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 399 transitions. Word has length 78 [2023-04-02 02:07:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:12,084 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 399 transitions. [2023-04-02 02:07:12,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-02 02:07:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 399 transitions. [2023-04-02 02:07:12,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-02 02:07:12,084 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:12,084 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:12,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:12,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:12,290 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:12,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:12,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2023-04-02 02:07:12,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:12,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670285359] [2023-04-02 02:07:12,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:12,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:12,297 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:12,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971160630] [2023-04-02 02:07:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:12,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:12,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:12,298 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:12,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 02:07:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:12,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 02:07:12,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 33 proven. 23 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-04-02 02:07:12,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-04-02 02:07:13,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:13,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670285359] [2023-04-02 02:07:13,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:13,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971160630] [2023-04-02 02:07:13,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971160630] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:07:13,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:07:13,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2023-04-02 02:07:13,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233616434] [2023-04-02 02:07:13,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:13,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 02:07:13,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:13,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 02:07:13,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-04-02 02:07:13,618 INFO L87 Difference]: Start difference. First operand 324 states and 399 transitions. Second operand has 24 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 11 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2023-04-02 02:07:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:22,238 INFO L93 Difference]: Finished difference Result 393 states and 497 transitions. [2023-04-02 02:07:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-02 02:07:22,239 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 11 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) Word has length 84 [2023-04-02 02:07:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:22,240 INFO L225 Difference]: With dead ends: 393 [2023-04-02 02:07:22,240 INFO L226 Difference]: Without dead ends: 382 [2023-04-02 02:07:22,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=446, Invalid=2004, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 02:07:22,241 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 149 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:22,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 548 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-02 02:07:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-04-02 02:07:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 370. [2023-04-02 02:07:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 245 states have (on average 1.1959183673469387) internal successors, (293), 252 states have internal predecessors, (293), 89 states have call successors, (89), 36 states have call predecessors, (89), 35 states have return successors, (86), 81 states have call predecessors, (86), 86 states have call successors, (86) [2023-04-02 02:07:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 468 transitions. [2023-04-02 02:07:22,291 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 468 transitions. Word has length 84 [2023-04-02 02:07:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:22,291 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 468 transitions. [2023-04-02 02:07:22,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 11 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2023-04-02 02:07:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 468 transitions. [2023-04-02 02:07:22,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 02:07:22,292 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:22,292 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:22,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-04-02 02:07:22,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 02:07:22,497 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:22,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:22,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2023-04-02 02:07:22,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:22,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255603453] [2023-04-02 02:07:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:22,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:22,504 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:22,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452545487] [2023-04-02 02:07:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:22,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:22,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:22,505 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:22,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-02 02:07:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:22,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-02 02:07:22,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-04-02 02:07:23,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-04-02 02:07:24,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:24,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255603453] [2023-04-02 02:07:24,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:24,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452545487] [2023-04-02 02:07:24,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452545487] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:07:24,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:07:24,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-04-02 02:07:24,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355923896] [2023-04-02 02:07:24,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:24,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 02:07:24,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:24,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 02:07:24,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-04-02 02:07:24,134 INFO L87 Difference]: Start difference. First operand 370 states and 468 transitions. Second operand has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2023-04-02 02:07:32,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:07:34,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:07:48,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:07:48,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:48,789 INFO L93 Difference]: Finished difference Result 413 states and 528 transitions. [2023-04-02 02:07:48,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 02:07:48,790 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) Word has length 101 [2023-04-02 02:07:48,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:48,792 INFO L225 Difference]: With dead ends: 413 [2023-04-02 02:07:48,792 INFO L226 Difference]: Without dead ends: 411 [2023-04-02 02:07:48,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=334, Invalid=1225, Unknown=1, NotChecked=0, Total=1560 [2023-04-02 02:07:48,793 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 150 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 101 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:48,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 339 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 599 Invalid, 3 Unknown, 0 Unchecked, 10.2s Time] [2023-04-02 02:07:48,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2023-04-02 02:07:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 387. [2023-04-02 02:07:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 252 states have (on average 1.1944444444444444) internal successors, (301), 261 states have internal predecessors, (301), 98 states have call successors, (98), 37 states have call predecessors, (98), 36 states have return successors, (95), 88 states have call predecessors, (95), 95 states have call successors, (95) [2023-04-02 02:07:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 494 transitions. [2023-04-02 02:07:48,881 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 494 transitions. Word has length 101 [2023-04-02 02:07:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:48,881 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 494 transitions. [2023-04-02 02:07:48,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2023-04-02 02:07:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 494 transitions. [2023-04-02 02:07:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 02:07:48,883 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:48,883 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:48,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:49,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-02 02:07:49,087 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:49,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:49,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1843605336, now seen corresponding path program 4 times [2023-04-02 02:07:49,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:49,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065548438] [2023-04-02 02:07:49,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:49,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:49,093 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:49,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629828981] [2023-04-02 02:07:49,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 02:07:49,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:49,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:49,096 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:49,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-02 02:07:49,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 02:07:49,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:07:49,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 02:07:49,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-04-02 02:07:49,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:07:49,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:49,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065548438] [2023-04-02 02:07:49,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:49,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629828981] [2023-04-02 02:07:49,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629828981] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:07:49,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:07:49,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 02:07:49,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871531219] [2023-04-02 02:07:49,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:07:49,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:07:49,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:49,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:07:49,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:07:49,179 INFO L87 Difference]: Start difference. First operand 387 states and 494 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-04-02 02:07:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:49,349 INFO L93 Difference]: Finished difference Result 581 states and 803 transitions. [2023-04-02 02:07:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:07:49,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 100 [2023-04-02 02:07:49,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:49,351 INFO L225 Difference]: With dead ends: 581 [2023-04-02 02:07:49,351 INFO L226 Difference]: Without dead ends: 447 [2023-04-02 02:07:49,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 02:07:49,352 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:49,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 175 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:07:49,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-04-02 02:07:49,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 406. [2023-04-02 02:07:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 264 states have (on average 1.2121212121212122) internal successors, (320), 271 states have internal predecessors, (320), 105 states have call successors, (105), 37 states have call predecessors, (105), 36 states have return successors, (102), 97 states have call predecessors, (102), 102 states have call successors, (102) [2023-04-02 02:07:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 527 transitions. [2023-04-02 02:07:49,455 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 527 transitions. Word has length 100 [2023-04-02 02:07:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:49,455 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 527 transitions. [2023-04-02 02:07:49,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-04-02 02:07:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 527 transitions. [2023-04-02 02:07:49,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-02 02:07:49,456 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:49,456 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:49,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:49,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 02:07:49,661 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:49,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:49,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 1 times [2023-04-02 02:07:49,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:49,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556977367] [2023-04-02 02:07:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:49,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:49,668 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:49,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935744150] [2023-04-02 02:07:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:49,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:49,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:49,670 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:49,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-02 02:07:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:49,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 02:07:49,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-04-02 02:07:49,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-04-02 02:07:50,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:50,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556977367] [2023-04-02 02:07:50,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:50,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935744150] [2023-04-02 02:07:50,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935744150] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:07:50,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:07:50,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-04-02 02:07:50,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731480074] [2023-04-02 02:07:50,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:50,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 02:07:50,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:50,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 02:07:50,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:07:50,007 INFO L87 Difference]: Start difference. First operand 406 states and 527 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 9 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 7 states have call predecessors, (34), 8 states have call successors, (34) [2023-04-02 02:07:50,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:50,389 INFO L93 Difference]: Finished difference Result 958 states and 1280 transitions. [2023-04-02 02:07:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 02:07:50,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 9 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 7 states have call predecessors, (34), 8 states have call successors, (34) Word has length 116 [2023-04-02 02:07:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:50,392 INFO L225 Difference]: With dead ends: 958 [2023-04-02 02:07:50,392 INFO L226 Difference]: Without dead ends: 809 [2023-04-02 02:07:50,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 214 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2023-04-02 02:07:50,393 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 112 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:50,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 247 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:07:50,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2023-04-02 02:07:50,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 785. [2023-04-02 02:07:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 504 states have (on average 1.1785714285714286) internal successors, (594), 515 states have internal predecessors, (594), 204 states have call successors, (204), 77 states have call predecessors, (204), 76 states have return successors, (198), 192 states have call predecessors, (198), 198 states have call successors, (198) [2023-04-02 02:07:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 996 transitions. [2023-04-02 02:07:50,605 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 996 transitions. Word has length 116 [2023-04-02 02:07:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:50,605 INFO L495 AbstractCegarLoop]: Abstraction has 785 states and 996 transitions. [2023-04-02 02:07:50,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 9 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 7 states have call predecessors, (34), 8 states have call successors, (34) [2023-04-02 02:07:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 996 transitions. [2023-04-02 02:07:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-02 02:07:50,606 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:50,606 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:50,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:50,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 02:07:50,811 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:50,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:50,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1900995718, now seen corresponding path program 2 times [2023-04-02 02:07:50,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:50,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547945779] [2023-04-02 02:07:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:50,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:50,817 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:50,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281464626] [2023-04-02 02:07:50,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:07:50,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:50,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:50,818 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:07:50,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-04-02 02:07:50,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:07:50,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:07:50,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-02 02:07:50,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-04-02 02:07:51,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-04-02 02:07:52,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:52,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547945779] [2023-04-02 02:07:52,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:52,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281464626] [2023-04-02 02:07:52,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281464626] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:07:52,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:07:52,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-04-02 02:07:52,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212208785] [2023-04-02 02:07:52,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:52,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 02:07:52,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:52,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 02:07:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-04-02 02:07:52,019 INFO L87 Difference]: Start difference. First operand 785 states and 996 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 18 states have internal predecessors, (55), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 12 states have call predecessors, (36), 11 states have call successors, (36) [2023-04-02 02:08:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:08:10,221 INFO L93 Difference]: Finished difference Result 1054 states and 1375 transitions. [2023-04-02 02:08:10,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-04-02 02:08:10,221 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 18 states have internal predecessors, (55), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 12 states have call predecessors, (36), 11 states have call successors, (36) Word has length 119 [2023-04-02 02:08:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:08:10,224 INFO L225 Difference]: With dead ends: 1054 [2023-04-02 02:08:10,224 INFO L226 Difference]: Without dead ends: 1052 [2023-04-02 02:08:10,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=645, Invalid=2547, Unknown=0, NotChecked=0, Total=3192 [2023-04-02 02:08:10,225 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 178 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-04-02 02:08:10,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 630 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-04-02 02:08:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2023-04-02 02:08:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 996. [2023-04-02 02:08:10,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 632 states have (on average 1.1962025316455696) internal successors, (756), 643 states have internal predecessors, (756), 272 states have call successors, (272), 92 states have call predecessors, (272), 91 states have return successors, (266), 260 states have call predecessors, (266), 266 states have call successors, (266) [2023-04-02 02:08:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1294 transitions. [2023-04-02 02:08:10,582 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1294 transitions. Word has length 119 [2023-04-02 02:08:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:08:10,582 INFO L495 AbstractCegarLoop]: Abstraction has 996 states and 1294 transitions. [2023-04-02 02:08:10,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 18 states have internal predecessors, (55), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 12 states have call predecessors, (36), 11 states have call successors, (36) [2023-04-02 02:08:10,582 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1294 transitions. [2023-04-02 02:08:10,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-02 02:08:10,583 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:08:10,583 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:08:10,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-04-02 02:08:10,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:08:10,789 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:08:10,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:08:10,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1110867224, now seen corresponding path program 3 times [2023-04-02 02:08:10,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:08:10,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035249526] [2023-04-02 02:08:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:08:10,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:08:10,797 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:08:10,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353530561] [2023-04-02 02:08:10,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:08:10,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:08:10,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:08:10,798 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:08:10,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-04-02 02:08:10,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 02:08:10,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:08:10,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 59 conjunts are in the unsatisfiable core [2023-04-02 02:08:10,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:08:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-04-02 02:08:11,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:08:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-04-02 02:08:12,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:08:12,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035249526] [2023-04-02 02:08:12,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:08:12,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353530561] [2023-04-02 02:08:12,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353530561] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:08:12,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:08:12,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2023-04-02 02:08:12,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723593109] [2023-04-02 02:08:12,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:08:12,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 02:08:12,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:08:12,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 02:08:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-04-02 02:08:12,471 INFO L87 Difference]: Start difference. First operand 996 states and 1294 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 22 states have internal predecessors, (63), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2023-04-02 02:08:22,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:08:22,242 INFO L93 Difference]: Finished difference Result 1336 states and 1772 transitions. [2023-04-02 02:08:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-04-02 02:08:22,243 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 22 states have internal predecessors, (63), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) Word has length 123 [2023-04-02 02:08:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:08:22,247 INFO L225 Difference]: With dead ends: 1336 [2023-04-02 02:08:22,247 INFO L226 Difference]: Without dead ends: 1332 [2023-04-02 02:08:22,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=570, Invalid=2400, Unknown=0, NotChecked=0, Total=2970 [2023-04-02 02:08:22,248 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 190 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:08:22,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 530 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-02 02:08:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2023-04-02 02:08:22,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1244. [2023-04-02 02:08:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 794 states have (on average 1.216624685138539) internal successors, (966), 805 states have internal predecessors, (966), 340 states have call successors, (340), 111 states have call predecessors, (340), 109 states have return successors, (334), 327 states have call predecessors, (334), 334 states have call successors, (334) [2023-04-02 02:08:22,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1640 transitions. [2023-04-02 02:08:22,695 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1640 transitions. Word has length 123 [2023-04-02 02:08:22,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:08:22,695 INFO L495 AbstractCegarLoop]: Abstraction has 1244 states and 1640 transitions. [2023-04-02 02:08:22,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 22 states have internal predecessors, (63), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2023-04-02 02:08:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1640 transitions. [2023-04-02 02:08:22,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-02 02:08:22,696 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:08:22,696 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:08:22,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-04-02 02:08:22,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:08:22,905 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:08:22,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:08:22,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2098906485, now seen corresponding path program 1 times [2023-04-02 02:08:22,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:08:22,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135412426] [2023-04-02 02:08:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:08:22,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:08:22,911 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:08:22,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392233011] [2023-04-02 02:08:22,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:08:22,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:08:22,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:08:22,912 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:08:22,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-04-02 02:08:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:08:22,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 02:08:22,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:08:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-04-02 02:08:23,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:08:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2023-04-02 02:08:23,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:08:23,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135412426] [2023-04-02 02:08:23,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:08:23,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392233011] [2023-04-02 02:08:23,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392233011] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:08:23,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:08:23,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-04-02 02:08:23,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201623366] [2023-04-02 02:08:23,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:08:23,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 02:08:23,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:08:23,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 02:08:23,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:08:23,226 INFO L87 Difference]: Start difference. First operand 1244 states and 1640 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 9 states have call successors, (44), 7 states have call predecessors, (44), 6 states have return successors, (42), 7 states have call predecessors, (42), 8 states have call successors, (42) [2023-04-02 02:08:23,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:08:23,816 INFO L93 Difference]: Finished difference Result 1291 states and 1690 transitions. [2023-04-02 02:08:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 02:08:23,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 9 states have call successors, (44), 7 states have call predecessors, (44), 6 states have return successors, (42), 7 states have call predecessors, (42), 8 states have call successors, (42) Word has length 133 [2023-04-02 02:08:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:08:23,820 INFO L225 Difference]: With dead ends: 1291 [2023-04-02 02:08:23,820 INFO L226 Difference]: Without dead ends: 1271 [2023-04-02 02:08:23,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 248 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2023-04-02 02:08:23,823 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 87 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:08:23,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 201 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:08:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2023-04-02 02:08:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1265. [2023-04-02 02:08:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 815 states have (on average 1.196319018404908) internal successors, (975), 826 states have internal predecessors, (975), 340 states have call successors, (340), 111 states have call predecessors, (340), 109 states have return successors, (334), 327 states have call predecessors, (334), 334 states have call successors, (334) [2023-04-02 02:08:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1649 transitions. [2023-04-02 02:08:24,272 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1649 transitions. Word has length 133 [2023-04-02 02:08:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:08:24,272 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 1649 transitions. [2023-04-02 02:08:24,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 9 states have call successors, (44), 7 states have call predecessors, (44), 6 states have return successors, (42), 7 states have call predecessors, (42), 8 states have call successors, (42) [2023-04-02 02:08:24,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1649 transitions. [2023-04-02 02:08:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-02 02:08:24,273 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:08:24,274 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:08:24,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-04-02 02:08:24,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:08:24,478 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:08:24,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:08:24,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1894865945, now seen corresponding path program 2 times [2023-04-02 02:08:24,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:08:24,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487881351] [2023-04-02 02:08:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:08:24,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:08:24,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:08:24,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065297441] [2023-04-02 02:08:24,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:08:24,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:08:24,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:08:24,488 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:08:24,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-04-02 02:08:24,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:08:24,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:08:24,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 66 conjunts are in the unsatisfiable core [2023-04-02 02:08:24,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:08:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 35 proven. 58 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-04-02 02:08:25,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:08:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2023-04-02 02:08:27,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:08:27,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487881351] [2023-04-02 02:08:27,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:08:27,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065297441] [2023-04-02 02:08:27,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065297441] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:08:27,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:08:27,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2023-04-02 02:08:27,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882197165] [2023-04-02 02:08:27,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:08:27,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-02 02:08:27,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:08:27,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-02 02:08:27,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-04-02 02:08:27,419 INFO L87 Difference]: Start difference. First operand 1265 states and 1649 transitions. Second operand has 29 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 14 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (41), 13 states have call predecessors, (41), 12 states have call successors, (41) [2023-04-02 02:09:03,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:03,283 INFO L93 Difference]: Finished difference Result 1672 states and 2290 transitions. [2023-04-02 02:09:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-04-02 02:09:03,284 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 14 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (41), 13 states have call predecessors, (41), 12 states have call successors, (41) Word has length 134 [2023-04-02 02:09:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:03,289 INFO L225 Difference]: With dead ends: 1672 [2023-04-02 02:09:03,289 INFO L226 Difference]: Without dead ends: 1652 [2023-04-02 02:09:03,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=1337, Invalid=5803, Unknown=0, NotChecked=0, Total=7140 [2023-04-02 02:09:03,291 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 478 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 1956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:03,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 967 Invalid, 1956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2023-04-02 02:09:03,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2023-04-02 02:09:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1483. [2023-04-02 02:09:03,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 953 states have (on average 1.2214060860440714) internal successors, (1164), 962 states have internal predecessors, (1164), 414 states have call successors, (414), 116 states have call predecessors, (414), 115 states have return successors, (410), 404 states have call predecessors, (410), 410 states have call successors, (410) [2023-04-02 02:09:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 1988 transitions. [2023-04-02 02:09:03,952 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 1988 transitions. Word has length 134 [2023-04-02 02:09:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:03,952 INFO L495 AbstractCegarLoop]: Abstraction has 1483 states and 1988 transitions. [2023-04-02 02:09:03,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 14 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (41), 13 states have call predecessors, (41), 12 states have call successors, (41) [2023-04-02 02:09:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 1988 transitions. [2023-04-02 02:09:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-02 02:09:03,953 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:03,954 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:09:03,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-04-02 02:09:04,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:04,158 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:04,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:04,159 INFO L85 PathProgramCache]: Analyzing trace with hash 40428859, now seen corresponding path program 4 times [2023-04-02 02:09:04,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:04,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160834005] [2023-04-02 02:09:04,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:04,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:04,165 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:04,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178958390] [2023-04-02 02:09:04,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 02:09:04,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:04,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:04,166 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:09:04,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-04-02 02:09:04,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 02:09:04,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:09:04,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 74 conjunts are in the unsatisfiable core [2023-04-02 02:09:04,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 91 proven. 86 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2023-04-02 02:09:05,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2023-04-02 02:09:09,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:09,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160834005] [2023-04-02 02:09:09,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:09,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178958390] [2023-04-02 02:09:09,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178958390] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:09:09,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:09:09,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2023-04-02 02:09:09,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630382708] [2023-04-02 02:09:09,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:09:09,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-02 02:09:09,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:09,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-02 02:09:09,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2023-04-02 02:09:09,908 INFO L87 Difference]: Start difference. First operand 1483 states and 1988 transitions. Second operand has 30 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 27 states have internal predecessors, (74), 15 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (47), 15 states have call predecessors, (47), 14 states have call successors, (47) [2023-04-02 02:09:17,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:09:38,450 WARN L223 SmtUtils]: Spent 21.05s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:09:40,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:09:57,349 WARN L223 SmtUtils]: Spent 11.13s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:10:30,510 WARN L223 SmtUtils]: Spent 32.93s on a formula simplification that was a NOOP. DAG size: 118 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:10:32,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:10:34,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:10:37,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:10:39,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:11:00,638 WARN L223 SmtUtils]: Spent 20.71s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:11:02,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:11:05,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:11:07,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:11:09,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []