/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/array-tiling/skipped.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:18:02,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:18:02,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:18:02,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 22:18:02,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 22:18:02,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 22:18:02,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 22:18:02,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 22:18:02,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 22:18:02,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 22:18:02,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 22:18:02,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 22:18:02,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:18:02,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:18:02,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:18:02,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:18:02,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:18:02,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:18:02,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:18:02,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:18:02,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:18:02,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:18:02,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:18:02,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:18:02,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-30 22:18:02,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-30 22:18:02,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-30 22:18:02,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-30 22:18:02,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-30 22:18:02,245 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-30 22:18:02,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 22:18:02,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 22:18:02,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 22:18:02,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 22:18:02,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 22:18:02,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 22:18:02,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 22:18:02,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 22:18:02,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:18:02,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:18:02,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:18:02,251 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 [2023-03-30 22:18:02,265 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:18:02,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:18:02,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:18:02,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:18:02,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:18:02,266 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:18:02,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:18:02,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:18:02,266 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:18:02,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:18:02,267 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:18:02,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:18:02,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:18:02,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:18:02,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:18:02,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:18:02,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:18:02,267 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:18:02,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:18:02,268 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:18:02,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:18:02,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:18:02,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:18:02,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:18:02,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:18:02,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:18:02,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:18:02,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:18:02,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:18:02,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:18:02,269 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:18:02,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:18:02,269 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:18:02,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:18:02,269 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:18:02,269 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:18:02,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:18:02,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:18:02,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:18:02,455 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:18:02,456 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:18:02,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/skipped.c [2023-03-30 22:18:03,455 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:18:03,631 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:18:03,631 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/skipped.c [2023-03-30 22:18:03,637 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88b3e8042/b2d4380cbf9f4efda5c639364cb12631/FLAG19d96c258 [2023-03-30 22:18:03,652 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88b3e8042/b2d4380cbf9f4efda5c639364cb12631 [2023-03-30 22:18:03,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:18:03,656 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:18:03,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:18:03,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:18:03,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:18:03,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:18:03" (1/1) ... [2023-03-30 22:18:03,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c5b3d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:18:03, skipping insertion in model container [2023-03-30 22:18:03,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:18:03" (1/1) ... [2023-03-30 22:18:03,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:18:03,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:18:03,773 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/array-tiling/skipped.c[398,411] [2023-03-30 22:18:03,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:18:03,801 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:18:03,811 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/array-tiling/skipped.c[398,411] [2023-03-30 22:18:03,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:18:03,826 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:18:03,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:18:03 WrapperNode [2023-03-30 22:18:03,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:18:03,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:18:03,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:18:03,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:18:03,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:18:03" (1/1) ... [2023-03-30 22:18:03,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:18:03" (1/1) ... [2023-03-30 22:18:03,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:18:03" (1/1) ... [2023-03-30 22:18:03,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:18:03" (1/1) ... [2023-03-30 22:18:03,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:18:03" (1/1) ... [2023-03-30 22:18:03,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:18:03" (1/1) ... [2023-03-30 22:18:03,846 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:18:03" (1/1) ... [2023-03-30 22:18:03,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:18:03" (1/1) ... [2023-03-30 22:18:03,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:18:03,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:18:03,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:18:03,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:18:03,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:18:03" (1/1) ... [2023-03-30 22:18:03,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:18:03,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:03,870 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) [2023-03-30 22:18:03,878 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 [2023-03-30 22:18:03,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:18:03,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:18:03,895 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:18:03,896 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-30 22:18:03,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:18:03,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:18:03,896 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:18:03,896 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:18:03,896 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:18:03,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:18:03,896 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-30 22:18:03,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:18:03,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:18:03,896 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-30 22:18:03,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:18:03,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-30 22:18:03,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:18:03,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:18:03,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:18:03,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:18:03,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:18:03,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:18:03,942 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:18:03,943 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:18:04,132 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:18:04,136 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:18:04,136 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-30 22:18:04,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:18:04 BoogieIcfgContainer [2023-03-30 22:18:04,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:18:04,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:18:04,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:18:04,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:18:04,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:18:03" (1/3) ... [2023-03-30 22:18:04,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@558b782a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:18:04, skipping insertion in model container [2023-03-30 22:18:04,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:18:03" (2/3) ... [2023-03-30 22:18:04,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@558b782a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:18:04, skipping insertion in model container [2023-03-30 22:18:04,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:18:04" (3/3) ... [2023-03-30 22:18:04,154 INFO L112 eAbstractionObserver]: Analyzing ICFG skipped.c [2023-03-30 22:18:04,175 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:18:04,175 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:18:04,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:18:04,213 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;@4da47edd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:18:04,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:18:04,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:18:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:18:04,221 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:04,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:18:04,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:04,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:04,225 INFO L85 PathProgramCache]: Analyzing trace with hash 535893130, now seen corresponding path program 1 times [2023-03-30 22:18:04,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:04,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950726733] [2023-03-30 22:18:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:04,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-03-30 22:18:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:04,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:04,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950726733] [2023-03-30 22:18:04,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950726733] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:18:04,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:18:04,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:18:04,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821952013] [2023-03-30 22:18:04,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:18:04,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:18:04,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:04,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:18:04,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:18:04,526 INFO L87 Difference]: Start difference. First operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:18:04,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:04,652 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2023-03-30 22:18:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:18:04,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-03-30 22:18:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:04,672 INFO L225 Difference]: With dead ends: 67 [2023-03-30 22:18:04,672 INFO L226 Difference]: Without dead ends: 34 [2023-03-30 22:18:04,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:18:04,677 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:04,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:18:04,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-30 22:18:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-03-30 22:18:04,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:18:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-03-30 22:18:04,703 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2023-03-30 22:18:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:04,703 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-03-30 22:18:04,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:18:04,704 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-03-30 22:18:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-30 22:18:04,704 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:04,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:18:04,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:18:04,705 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:04,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:04,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1366996202, now seen corresponding path program 1 times [2023-03-30 22:18:04,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:04,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536741237] [2023-03-30 22:18:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:04,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-03-30 22:18:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:04,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:04,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536741237] [2023-03-30 22:18:04,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536741237] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:04,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022644167] [2023-03-30 22:18:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:04,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:04,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:04,855 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) [2023-03-30 22:18:04,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:18:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:18:04,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:05,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:05,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022644167] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:05,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:05,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:18:05,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668021503] [2023-03-30 22:18:05,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:05,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:18:05,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:05,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:18:05,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:18:05,060 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:18:05,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:05,191 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2023-03-30 22:18:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:18:05,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-03-30 22:18:05,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:05,192 INFO L225 Difference]: With dead ends: 59 [2023-03-30 22:18:05,192 INFO L226 Difference]: Without dead ends: 36 [2023-03-30 22:18:05,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:18:05,193 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:05,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 48 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:18:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-03-30 22:18:05,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-03-30 22:18:05,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:18:05,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-03-30 22:18:05,198 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2023-03-30 22:18:05,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:05,198 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-03-30 22:18:05,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:18:05,199 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-03-30 22:18:05,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-30 22:18:05,199 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:05,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:18:05,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 22:18:05,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:05,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:05,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:05,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1779937352, now seen corresponding path program 2 times [2023-03-30 22:18:05,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:05,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488871620] [2023-03-30 22:18:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:05,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:05,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:05,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-03-30 22:18:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:18:05,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:05,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488871620] [2023-03-30 22:18:05,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488871620] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:18:05,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:18:05,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:18:05,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309891562] [2023-03-30 22:18:05,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:18:05,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:18:05,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:18:05,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:18:05,681 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:18:05,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:05,782 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2023-03-30 22:18:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:18:05,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-03-30 22:18:05,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:05,784 INFO L225 Difference]: With dead ends: 51 [2023-03-30 22:18:05,785 INFO L226 Difference]: Without dead ends: 40 [2023-03-30 22:18:05,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:18:05,787 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:05,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 25 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:18:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-03-30 22:18:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2023-03-30 22:18:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:18:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-03-30 22:18:05,808 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 26 [2023-03-30 22:18:05,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:05,810 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-03-30 22:18:05,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:18:05,810 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-03-30 22:18:05,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-30 22:18:05,811 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:05,811 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 22:18:05,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 22:18:05,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:05,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1702830002, now seen corresponding path program 1 times [2023-03-30 22:18:05,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:05,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086758735] [2023-03-30 22:18:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:05,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:06,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:06,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-03-30 22:18:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:18:06,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:06,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086758735] [2023-03-30 22:18:06,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086758735] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:06,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850901511] [2023-03-30 22:18:06,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:06,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:06,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:06,219 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) [2023-03-30 22:18:06,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:18:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:06,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-30 22:18:06,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:06,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:18:06,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:18:06,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-30 22:18:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:18:06,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:06,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-03-30 22:18:06,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-03-30 22:18:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:18:06,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850901511] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:06,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:06,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 8] total 22 [2023-03-30 22:18:06,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821726573] [2023-03-30 22:18:06,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:06,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-30 22:18:06,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:06,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-30 22:18:06,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2023-03-30 22:18:06,623 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 22 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:18:07,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:07,041 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2023-03-30 22:18:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-30 22:18:07,042 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2023-03-30 22:18:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:07,043 INFO L225 Difference]: With dead ends: 69 [2023-03-30 22:18:07,043 INFO L226 Difference]: Without dead ends: 67 [2023-03-30 22:18:07,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2023-03-30 22:18:07,044 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:07,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 136 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:18:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-03-30 22:18:07,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2023-03-30 22:18:07,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 states have internal predecessors, (48), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:18:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-03-30 22:18:07,054 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 31 [2023-03-30 22:18:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:07,054 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-03-30 22:18:07,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:18:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-03-30 22:18:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-30 22:18:07,055 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:07,055 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 22:18:07,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:18:07,259 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,SelfDestructingSolverStorable3 [2023-03-30 22:18:07,260 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:07,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:07,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1001765424, now seen corresponding path program 1 times [2023-03-30 22:18:07,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:07,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843421507] [2023-03-30 22:18:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:07,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:07,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:07,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-03-30 22:18:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:18:07,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:07,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843421507] [2023-03-30 22:18:07,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843421507] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:07,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176004301] [2023-03-30 22:18:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:07,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:07,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:07,509 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) [2023-03-30 22:18:07,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:18:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:07,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-30 22:18:07,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:07,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:18:07,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-30 22:18:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:18:07,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:07,796 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-03-30 22:18:07,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2023-03-30 22:18:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:18:07,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176004301] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:07,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:07,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 9] total 25 [2023-03-30 22:18:07,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115531442] [2023-03-30 22:18:07,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:07,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-30 22:18:07,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-30 22:18:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-03-30 22:18:07,829 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 25 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:18:08,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:08,205 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2023-03-30 22:18:08,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-30 22:18:08,205 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2023-03-30 22:18:08,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:08,207 INFO L225 Difference]: With dead ends: 71 [2023-03-30 22:18:08,207 INFO L226 Difference]: Without dead ends: 69 [2023-03-30 22:18:08,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2023-03-30 22:18:08,208 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 131 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:08,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 113 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:18:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-03-30 22:18:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2023-03-30 22:18:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:18:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-03-30 22:18:08,214 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 31 [2023-03-30 22:18:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:08,214 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-03-30 22:18:08,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:18:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-03-30 22:18:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-30 22:18:08,215 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:08,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:18:08,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-30 22:18:08,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:08,420 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:08,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:08,420 INFO L85 PathProgramCache]: Analyzing trace with hash 534619777, now seen corresponding path program 1 times [2023-03-30 22:18:08,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:08,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600145374] [2023-03-30 22:18:08,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:08,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:08,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:08,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-03-30 22:18:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:08,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-03-30 22:18:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:08,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:08,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600145374] [2023-03-30 22:18:08,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600145374] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:08,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611509987] [2023-03-30 22:18:08,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:08,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:08,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:08,710 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) [2023-03-30 22:18:08,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:18:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:08,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2023-03-30 22:18:08,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:08,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:18:08,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-30 22:18:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:18:08,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:09,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-03-30 22:18:09,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-03-30 22:18:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:18:09,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611509987] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:09,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:09,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 26 [2023-03-30 22:18:09,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94132334] [2023-03-30 22:18:09,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:09,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-30 22:18:09,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:09,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-30 22:18:09,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2023-03-30 22:18:09,054 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 26 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 8 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-30 22:18:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:09,455 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2023-03-30 22:18:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 22:18:09,455 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 8 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2023-03-30 22:18:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:09,456 INFO L225 Difference]: With dead ends: 88 [2023-03-30 22:18:09,456 INFO L226 Difference]: Without dead ends: 86 [2023-03-30 22:18:09,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2023-03-30 22:18:09,457 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:09,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 172 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:18:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-03-30 22:18:09,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 59. [2023-03-30 22:18:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:18:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2023-03-30 22:18:09,464 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 39 [2023-03-30 22:18:09,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:09,464 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2023-03-30 22:18:09,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 8 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-30 22:18:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2023-03-30 22:18:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-30 22:18:09,465 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:09,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:18:09,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:18:09,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:09,669 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:09,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:09,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1053728125, now seen corresponding path program 1 times [2023-03-30 22:18:09,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:09,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641352458] [2023-03-30 22:18:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:09,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:09,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:09,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-03-30 22:18:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:09,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-03-30 22:18:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:09,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:09,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641352458] [2023-03-30 22:18:09,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641352458] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:09,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408841893] [2023-03-30 22:18:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:09,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:09,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:09,964 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) [2023-03-30 22:18:09,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:18:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:10,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2023-03-30 22:18:10,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:10,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-30 22:18:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:18:10,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:10,373 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-03-30 22:18:10,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-03-30 22:18:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:18:10,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408841893] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:10,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:10,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 10] total 31 [2023-03-30 22:18:10,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604323121] [2023-03-30 22:18:10,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:10,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-03-30 22:18:10,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:10,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-03-30 22:18:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2023-03-30 22:18:10,395 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 26 states have internal predecessors, (69), 7 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-30 22:18:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:10,855 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2023-03-30 22:18:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-30 22:18:10,855 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 26 states have internal predecessors, (69), 7 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2023-03-30 22:18:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:10,863 INFO L225 Difference]: With dead ends: 80 [2023-03-30 22:18:10,863 INFO L226 Difference]: Without dead ends: 78 [2023-03-30 22:18:10,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=1644, Unknown=0, NotChecked=0, Total=1892 [2023-03-30 22:18:10,865 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 93 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:10,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 125 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:18:10,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-03-30 22:18:10,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2023-03-30 22:18:10,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.131578947368421) internal successors, (43), 39 states have internal predecessors, (43), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:18:10,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-03-30 22:18:10,875 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 39 [2023-03-30 22:18:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:10,876 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-03-30 22:18:10,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 26 states have internal predecessors, (69), 7 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-30 22:18:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-03-30 22:18:10,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-30 22:18:10,876 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:10,876 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-03-30 22:18:10,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:18:11,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:11,081 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:11,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:11,082 INFO L85 PathProgramCache]: Analyzing trace with hash 11962804, now seen corresponding path program 2 times [2023-03-30 22:18:11,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:11,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047941467] [2023-03-30 22:18:11,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:11,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:11,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:11,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-03-30 22:18:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:11,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-03-30 22:18:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:11,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-03-30 22:18:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:18:11,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:11,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047941467] [2023-03-30 22:18:11,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047941467] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:11,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945156889] [2023-03-30 22:18:11,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:18:11,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:11,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:11,173 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) [2023-03-30 22:18:11,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:18:11,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:18:11,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:18:11,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:18:11,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:18:11,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:18:11,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945156889] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:11,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:11,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2023-03-30 22:18:11,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251792223] [2023-03-30 22:18:11,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:11,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-30 22:18:11,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:11,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-30 22:18:11,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:18:11,366 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 8 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:18:11,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:11,532 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2023-03-30 22:18:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-30 22:18:11,533 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 8 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 47 [2023-03-30 22:18:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:11,533 INFO L225 Difference]: With dead ends: 130 [2023-03-30 22:18:11,533 INFO L226 Difference]: Without dead ends: 69 [2023-03-30 22:18:11,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-03-30 22:18:11,534 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 105 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:11,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 33 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:18:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-03-30 22:18:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2023-03-30 22:18:11,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.125) internal successors, (45), 41 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:18:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-03-30 22:18:11,540 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 47 [2023-03-30 22:18:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:11,540 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-03-30 22:18:11,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 8 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:18:11,542 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-03-30 22:18:11,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-03-30 22:18:11,542 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:11,543 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:18:11,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 22:18:11,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:11,744 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:11,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:11,744 INFO L85 PathProgramCache]: Analyzing trace with hash 138519702, now seen corresponding path program 3 times [2023-03-30 22:18:11,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:11,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089544770] [2023-03-30 22:18:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:11,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:11,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:11,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-03-30 22:18:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:11,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:18:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:11,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-03-30 22:18:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:18:11,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:11,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089544770] [2023-03-30 22:18:11,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089544770] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:11,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52228535] [2023-03-30 22:18:11,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:18:11,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:11,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:11,923 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) [2023-03-30 22:18:11,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 22:18:11,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-30 22:18:11,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:18:11,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-30 22:18:11,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-30 22:18:12,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-30 22:18:12,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52228535] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:12,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:12,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-03-30 22:18:12,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000240591] [2023-03-30 22:18:12,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:12,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-30 22:18:12,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:12,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-30 22:18:12,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2023-03-30 22:18:12,349 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 24 states have internal predecessors, (79), 9 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-30 22:18:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:12,784 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2023-03-30 22:18:12,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-30 22:18:12,784 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 24 states have internal predecessors, (79), 9 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2023-03-30 22:18:12,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:12,785 INFO L225 Difference]: With dead ends: 92 [2023-03-30 22:18:12,785 INFO L226 Difference]: Without dead ends: 67 [2023-03-30 22:18:12,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2023-03-30 22:18:12,786 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 141 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:12,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 63 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:18:12,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-03-30 22:18:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2023-03-30 22:18:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:18:12,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2023-03-30 22:18:12,793 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 49 [2023-03-30 22:18:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:12,793 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2023-03-30 22:18:12,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 24 states have internal predecessors, (79), 9 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-30 22:18:12,794 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2023-03-30 22:18:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-03-30 22:18:12,794 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:12,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-03-30 22:18:12,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 22:18:12,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:12,999 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:12,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1829379020, now seen corresponding path program 4 times [2023-03-30 22:18:12,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:12,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635190961] [2023-03-30 22:18:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:12,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:13,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:13,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-03-30 22:18:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:13,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-03-30 22:18:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:13,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-03-30 22:18:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:18:13,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:13,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635190961] [2023-03-30 22:18:13,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635190961] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:13,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175397656] [2023-03-30 22:18:13,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:18:13,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:13,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:13,223 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) [2023-03-30 22:18:13,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 22:18:13,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:18:13,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:18:13,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 22 conjunts are in the unsatisfiable core [2023-03-30 22:18:13,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:13,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-03-30 22:18:13,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-03-30 22:18:13,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-03-30 22:18:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-30 22:18:13,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:18,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-03-30 22:18:18,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-03-30 22:18:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-30 22:18:18,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175397656] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:18,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:18,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2023-03-30 22:18:18,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656791488] [2023-03-30 22:18:18,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:18,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-03-30 22:18:18,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:18,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-03-30 22:18:18,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=674, Unknown=3, NotChecked=0, Total=756 [2023-03-30 22:18:18,047 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 28 states, 25 states have (on average 3.24) internal successors, (81), 24 states have internal predecessors, (81), 9 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:18:20,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:22,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:28,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:30,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:32,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:36,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:42,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:44,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:46,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:48,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:50,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:52,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:53,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:53,002 INFO L93 Difference]: Finished difference Result 203 states and 240 transitions. [2023-03-30 22:18:53,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-03-30 22:18:53,003 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.24) internal successors, (81), 24 states have internal predecessors, (81), 9 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 54 [2023-03-30 22:18:53,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:53,003 INFO L225 Difference]: With dead ends: 203 [2023-03-30 22:18:53,003 INFO L226 Difference]: Without dead ends: 159 [2023-03-30 22:18:53,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=303, Invalid=2551, Unknown=8, NotChecked=0, Total=2862 [2023-03-30 22:18:53,005 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 168 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 75 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:53,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 137 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 956 Invalid, 12 Unknown, 0 Unchecked, 24.5s Time] [2023-03-30 22:18:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-03-30 22:18:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 74. [2023-03-30 22:18:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 61 states have internal predecessors, (71), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:18:53,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2023-03-30 22:18:53,015 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 54 [2023-03-30 22:18:53,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:53,015 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2023-03-30 22:18:53,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.24) internal successors, (81), 24 states have internal predecessors, (81), 9 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:18:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2023-03-30 22:18:53,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-03-30 22:18:53,015 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:53,016 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2023-03-30 22:18:53,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-30 22:18:53,225 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,SelfDestructingSolverStorable9 [2023-03-30 22:18:53,225 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:53,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:53,226 INFO L85 PathProgramCache]: Analyzing trace with hash -384204756, now seen corresponding path program 1 times [2023-03-30 22:18:53,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:53,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231024706] [2023-03-30 22:18:53,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:53,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:53,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:53,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-03-30 22:18:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:53,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-30 22:18:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:53,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-30 22:18:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:18:53,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:53,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231024706] [2023-03-30 22:18:53,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231024706] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:53,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806314921] [2023-03-30 22:18:53,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:53,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:53,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:53,861 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) [2023-03-30 22:18:53,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-30 22:18:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:53,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 36 conjunts are in the unsatisfiable core [2023-03-30 22:18:53,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:54,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:18:54,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-30 22:18:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-30 22:18:54,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:54,513 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-03-30 22:18:54,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-03-30 22:18:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-03-30 22:18:54,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806314921] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:54,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:54,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 12] total 37 [2023-03-30 22:18:54,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443894040] [2023-03-30 22:18:54,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:54,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-03-30 22:18:54,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:54,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-03-30 22:18:54,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2023-03-30 22:18:54,546 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 37 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 32 states have internal predecessors, (92), 9 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:18:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:55,243 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2023-03-30 22:18:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-03-30 22:18:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 32 states have internal predecessors, (92), 9 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 56 [2023-03-30 22:18:55,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:55,246 INFO L225 Difference]: With dead ends: 134 [2023-03-30 22:18:55,246 INFO L226 Difference]: Without dead ends: 132 [2023-03-30 22:18:55,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=384, Invalid=2808, Unknown=0, NotChecked=0, Total=3192 [2023-03-30 22:18:55,247 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 165 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:55,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 183 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1124 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 22:18:55,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-03-30 22:18:55,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 84. [2023-03-30 22:18:55,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.164179104477612) internal successors, (78), 69 states have internal predecessors, (78), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 22:18:55,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2023-03-30 22:18:55,267 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 56 [2023-03-30 22:18:55,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:55,268 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2023-03-30 22:18:55,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 32 states have internal predecessors, (92), 9 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:18:55,268 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2023-03-30 22:18:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-03-30 22:18:55,271 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:55,272 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1] [2023-03-30 22:18:55,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-30 22:18:55,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:55,487 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:55,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1660024611, now seen corresponding path program 5 times [2023-03-30 22:18:55,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:55,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438690838] [2023-03-30 22:18:55,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:55,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:56,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:56,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-03-30 22:18:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:56,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-30 22:18:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:56,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-30 22:18:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:56,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-30 22:18:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:18:56,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:56,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438690838] [2023-03-30 22:18:56,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438690838] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:56,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708999839] [2023-03-30 22:18:56,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:18:56,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:56,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:56,127 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) [2023-03-30 22:18:56,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-30 22:18:56,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-03-30 22:18:56,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:18:56,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2023-03-30 22:18:56,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:56,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:18:56,514 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-30 22:18:56,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:18:56,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-03-30 22:18:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-30 22:18:56,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:56,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-03-30 22:18:56,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-03-30 22:18:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-30 22:18:56,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708999839] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:56,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:56,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 12] total 36 [2023-03-30 22:18:56,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986155961] [2023-03-30 22:18:56,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:56,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-03-30 22:18:56,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:56,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-03-30 22:18:56,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2023-03-30 22:18:56,769 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 36 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 11 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-03-30 22:18:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:59,335 INFO L93 Difference]: Finished difference Result 493 states and 622 transitions. [2023-03-30 22:18:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-03-30 22:18:59,336 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 11 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) Word has length 64 [2023-03-30 22:18:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:59,338 INFO L225 Difference]: With dead ends: 493 [2023-03-30 22:18:59,338 INFO L226 Difference]: Without dead ends: 439 [2023-03-30 22:18:59,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 121 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3114 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1304, Invalid=8998, Unknown=0, NotChecked=0, Total=10302 [2023-03-30 22:18:59,341 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 559 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:59,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 254 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 22:18:59,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-03-30 22:18:59,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 144. [2023-03-30 22:18:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 123 states have internal predecessors, (144), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 9 states have call predecessors, (13), 13 states have call successors, (13) [2023-03-30 22:18:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 171 transitions. [2023-03-30 22:18:59,376 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 171 transitions. Word has length 64 [2023-03-30 22:18:59,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:59,377 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 171 transitions. [2023-03-30 22:18:59,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 11 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-03-30 22:18:59,378 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 171 transitions. [2023-03-30 22:18:59,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-03-30 22:18:59,379 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:59,379 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1] [2023-03-30 22:18:59,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-30 22:18:59,584 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,SelfDestructingSolverStorable11 [2023-03-30 22:18:59,584 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:59,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:59,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1732411169, now seen corresponding path program 1 times [2023-03-30 22:18:59,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:59,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866693683] [2023-03-30 22:18:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:59,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:00,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:19:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:00,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-03-30 22:19:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:00,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-30 22:19:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:00,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-30 22:19:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:00,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-30 22:19:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:19:00,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:19:00,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866693683] [2023-03-30 22:19:00,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866693683] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:19:00,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47823010] [2023-03-30 22:19:00,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:19:00,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:19:00,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:19:00,233 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) [2023-03-30 22:19:00,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-30 22:19:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:00,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 38 conjunts are in the unsatisfiable core [2023-03-30 22:19:00,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:19:00,847 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-30 22:19:00,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:19:00,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-03-30 22:19:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-30 22:19:00,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:19:01,078 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-03-30 22:19:01,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-03-30 22:19:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-30 22:19:01,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47823010] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:19:01,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:19:01,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 13] total 45 [2023-03-30 22:19:01,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272516656] [2023-03-30 22:19:01,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:19:01,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-03-30 22:19:01,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:19:01,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-03-30 22:19:01,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2023-03-30 22:19:01,140 INFO L87 Difference]: Start difference. First operand 144 states and 171 transitions. Second operand has 45 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 39 states have internal predecessors, (104), 11 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-03-30 22:19:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:19:02,955 INFO L93 Difference]: Finished difference Result 445 states and 573 transitions. [2023-03-30 22:19:02,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-03-30 22:19:02,956 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 39 states have internal predecessors, (104), 11 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) Word has length 64 [2023-03-30 22:19:02,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:19:02,958 INFO L225 Difference]: With dead ends: 445 [2023-03-30 22:19:02,958 INFO L226 Difference]: Without dead ends: 391 [2023-03-30 22:19:02,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 108 SyntacticMatches, 11 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=983, Invalid=6673, Unknown=0, NotChecked=0, Total=7656 [2023-03-30 22:19:02,960 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 736 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:19:02,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 227 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:19:02,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-03-30 22:19:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 160. [2023-03-30 22:19:02,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 132 states have (on average 1.1893939393939394) internal successors, (157), 136 states have internal predecessors, (157), 16 states have call successors, (16), 12 states have call predecessors, (16), 11 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2023-03-30 22:19:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 188 transitions. [2023-03-30 22:19:02,992 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 188 transitions. Word has length 64 [2023-03-30 22:19:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:19:02,993 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 188 transitions. [2023-03-30 22:19:02,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 39 states have internal predecessors, (104), 11 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-03-30 22:19:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 188 transitions. [2023-03-30 22:19:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-03-30 22:19:02,993 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:19:02,993 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:19:03,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-03-30 22:19:03,198 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,SelfDestructingSolverStorable12 [2023-03-30 22:19:03,198 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:19:03,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:19:03,199 INFO L85 PathProgramCache]: Analyzing trace with hash -922955760, now seen corresponding path program 6 times [2023-03-30 22:19:03,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:19:03,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553330351] [2023-03-30 22:19:03,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:19:03,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:19:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:03,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:19:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:03,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-03-30 22:19:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:03,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-30 22:19:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:03,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-30 22:19:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:03,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-30 22:19:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:03,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-03-30 22:19:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-30 22:19:03,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:19:03,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553330351] [2023-03-30 22:19:03,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553330351] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:19:03,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355936244] [2023-03-30 22:19:03,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-30 22:19:03,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:19:03,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:19:03,369 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) [2023-03-30 22:19:03,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-30 22:19:03,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-03-30 22:19:03,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:19:03,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:19:03,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:19:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-30 22:19:03,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:19:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-30 22:19:03,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355936244] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:19:03,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:19:03,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2023-03-30 22:19:03,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287132168] [2023-03-30 22:19:03,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:19:03,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-30 22:19:03,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:19:03,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-30 22:19:03,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-03-30 22:19:03,701 INFO L87 Difference]: Start difference. First operand 160 states and 188 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 12 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-03-30 22:19:04,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:19:04,013 INFO L93 Difference]: Finished difference Result 308 states and 363 transitions. [2023-03-30 22:19:04,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-30 22:19:04,014 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 12 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 72 [2023-03-30 22:19:04,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:19:04,015 INFO L225 Difference]: With dead ends: 308 [2023-03-30 22:19:04,015 INFO L226 Difference]: Without dead ends: 197 [2023-03-30 22:19:04,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 140 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2023-03-30 22:19:04,016 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 146 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:19:04,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 58 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:19:04,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-03-30 22:19:04,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 138. [2023-03-30 22:19:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 111 states have (on average 1.1711711711711712) internal successors, (130), 115 states have internal predecessors, (130), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (14), 10 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-30 22:19:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 159 transitions. [2023-03-30 22:19:04,042 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 159 transitions. Word has length 72 [2023-03-30 22:19:04,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:19:04,042 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 159 transitions. [2023-03-30 22:19:04,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 12 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-03-30 22:19:04,042 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 159 transitions. [2023-03-30 22:19:04,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-03-30 22:19:04,042 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:19:04,042 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:19:04,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-03-30 22:19:04,249 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,SelfDestructingSolverStorable13 [2023-03-30 22:19:04,250 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:19:04,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:19:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2015254382, now seen corresponding path program 7 times [2023-03-30 22:19:04,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:19:04,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811024361] [2023-03-30 22:19:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:19:04,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:19:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:04,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:19:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:04,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:19:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:04,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-30 22:19:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:04,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-03-30 22:19:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:04,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-03-30 22:19:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:04,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-03-30 22:19:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-30 22:19:04,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:19:04,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811024361] [2023-03-30 22:19:04,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811024361] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:19:04,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277840936] [2023-03-30 22:19:04,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-30 22:19:04,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:19:04,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:19:04,525 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) [2023-03-30 22:19:04,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-30 22:19:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:04,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:19:04,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:19:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-03-30 22:19:04,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:19:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-30 22:19:05,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277840936] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:19:05,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:19:05,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2023-03-30 22:19:05,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433203846] [2023-03-30 22:19:05,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:19:05,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-03-30 22:19:05,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:19:05,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-03-30 22:19:05,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=755, Unknown=0, NotChecked=0, Total=992 [2023-03-30 22:19:05,195 INFO L87 Difference]: Start difference. First operand 138 states and 159 transitions. Second operand has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-30 22:19:05,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:19:05,555 INFO L93 Difference]: Finished difference Result 246 states and 282 transitions. [2023-03-30 22:19:05,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-30 22:19:05,555 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2023-03-30 22:19:05,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:19:05,557 INFO L225 Difference]: With dead ends: 246 [2023-03-30 22:19:05,557 INFO L226 Difference]: Without dead ends: 164 [2023-03-30 22:19:05,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2023-03-30 22:19:05,561 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 194 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:19:05,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 78 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:19:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-03-30 22:19:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 146. [2023-03-30 22:19:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 123 states have internal predecessors, (138), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (14), 10 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-30 22:19:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 167 transitions. [2023-03-30 22:19:05,592 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 167 transitions. Word has length 74 [2023-03-30 22:19:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:19:05,592 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 167 transitions. [2023-03-30 22:19:05,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-30 22:19:05,592 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 167 transitions. [2023-03-30 22:19:05,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-30 22:19:05,593 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:19:05,593 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:19:05,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-03-30 22:19:05,802 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,SelfDestructingSolverStorable14 [2023-03-30 22:19:05,802 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:19:05,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:19:05,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1206089984, now seen corresponding path program 8 times [2023-03-30 22:19:05,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:19:05,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218715251] [2023-03-30 22:19:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:19:05,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:19:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:06,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:19:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:06,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:19:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:06,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-30 22:19:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:06,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-03-30 22:19:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:06,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-03-30 22:19:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:06,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-03-30 22:19:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-30 22:19:06,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:19:06,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218715251] [2023-03-30 22:19:06,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218715251] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:19:06,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447379742] [2023-03-30 22:19:06,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:19:06,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:19:06,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:19:06,155 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) [2023-03-30 22:19:06,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-03-30 22:19:06,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:19:06,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:19:06,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:19:06,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:19:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-03-30 22:19:06,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:19:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-30 22:19:06,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447379742] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:19:06,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:19:06,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 35 [2023-03-30 22:19:06,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031531060] [2023-03-30 22:19:06,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:19:06,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-03-30 22:19:06,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:19:06,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-03-30 22:19:06,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2023-03-30 22:19:06,722 INFO L87 Difference]: Start difference. First operand 146 states and 167 transitions. Second operand has 35 states, 34 states have (on average 3.0) internal successors, (102), 33 states have internal predecessors, (102), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-30 22:19:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:19:07,128 INFO L93 Difference]: Finished difference Result 284 states and 327 transitions. [2023-03-30 22:19:07,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-30 22:19:07,130 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.0) internal successors, (102), 33 states have internal predecessors, (102), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 79 [2023-03-30 22:19:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:19:07,132 INFO L225 Difference]: With dead ends: 284 [2023-03-30 22:19:07,132 INFO L226 Difference]: Without dead ends: 156 [2023-03-30 22:19:07,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=417, Invalid=1475, Unknown=0, NotChecked=0, Total=1892 [2023-03-30 22:19:07,133 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 134 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:19:07,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 50 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:19:07,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-03-30 22:19:07,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2023-03-30 22:19:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 121 states have (on average 1.1570247933884297) internal successors, (140), 125 states have internal predecessors, (140), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (14), 10 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-30 22:19:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2023-03-30 22:19:07,161 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 79 [2023-03-30 22:19:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:19:07,161 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2023-03-30 22:19:07,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.0) internal successors, (102), 33 states have internal predecessors, (102), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-30 22:19:07,161 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2023-03-30 22:19:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-30 22:19:07,162 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:19:07,162 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:19:07,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-03-30 22:19:07,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:19:07,367 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:19:07,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:19:07,367 INFO L85 PathProgramCache]: Analyzing trace with hash -718038558, now seen corresponding path program 9 times [2023-03-30 22:19:07,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:19:07,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926590258] [2023-03-30 22:19:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:19:07,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:19:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:07,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:19:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:07,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-03-30 22:19:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:07,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-03-30 22:19:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:07,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-03-30 22:19:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:07,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-03-30 22:19:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:07,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-03-30 22:19:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:19:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 8 proven. 85 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-30 22:19:07,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:19:07,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926590258] [2023-03-30 22:19:07,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926590258] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:19:07,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346484372] [2023-03-30 22:19:07,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:19:07,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:19:07,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:19:07,824 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) [2023-03-30 22:19:07,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-03-30 22:19:07,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-03-30 22:19:07,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:19:07,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjunts are in the unsatisfiable core [2023-03-30 22:19:07,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:19:08,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:19:08,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22