/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/rew.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:17:57,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:17:57,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:17:57,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 22:17:57,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 22:17:57,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 22:17:57,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 22:17:57,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 22:17:57,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 22:17:57,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 22:17:57,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 22:17:57,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 22:17:57,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:17:57,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:17:57,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:17:57,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:17:57,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:17:57,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:17:57,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:17:57,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:17:57,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:17:57,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:17:57,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:17:57,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:17:57,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-30 22:17:57,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-30 22:17:57,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-30 22:17:57,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-30 22:17:57,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-30 22:17:57,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-30 22:17:57,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 22:17:57,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 22:17:57,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 22:17:57,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 22:17:57,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 22:17:57,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 22:17:57,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 22:17:57,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 22:17:57,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:17:57,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:17:57,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:17:57,263 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 22:17:57,275 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:17:57,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:17:57,276 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:17:57,276 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:17:57,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:17:57,277 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:17:57,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:17:57,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:17:57,277 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:17:57,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:17:57,277 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:17:57,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:17:57,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:17:57,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:17:57,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:17:57,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:17:57,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:17:57,278 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:17:57,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:17:57,279 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:17:57,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:17:57,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:17:57,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:17:57,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:17:57,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:17:57,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:17:57,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:17:57,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:17:57,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:17:57,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:17:57,280 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:17:57,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:17:57,280 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:17:57,280 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:17:57,280 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:17:57,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:17:57,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:17:57,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:17:57,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:17:57,448 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:17:57,448 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:17:57,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rew.c [2023-03-30 22:17:58,402 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:17:58,611 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:17:58,611 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rew.c [2023-03-30 22:17:58,615 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70dd4eecb/7710831ebdb746fc9b9511fe05ddaa67/FLAG9defede4f [2023-03-30 22:17:58,633 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70dd4eecb/7710831ebdb746fc9b9511fe05ddaa67 [2023-03-30 22:17:58,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:17:58,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:17:58,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:17:58,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:17:58,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:17:58,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:17:58" (1/1) ... [2023-03-30 22:17:58,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a6a2aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:58, skipping insertion in model container [2023-03-30 22:17:58,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:17:58" (1/1) ... [2023-03-30 22:17:58,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:17:58,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:17:58,747 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/rew.c[394,407] [2023-03-30 22:17:58,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:17:58,767 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:17:58,775 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/rew.c[394,407] [2023-03-30 22:17:58,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:17:58,787 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:17:58,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:58 WrapperNode [2023-03-30 22:17:58,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:17:58,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:17:58,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:17:58,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:17:58,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:58" (1/1) ... [2023-03-30 22:17:58,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:58" (1/1) ... [2023-03-30 22:17:58,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:58" (1/1) ... [2023-03-30 22:17:58,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:58" (1/1) ... [2023-03-30 22:17:58,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:58" (1/1) ... [2023-03-30 22:17:58,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:58" (1/1) ... [2023-03-30 22:17:58,806 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:58" (1/1) ... [2023-03-30 22:17:58,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:58" (1/1) ... [2023-03-30 22:17:58,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:17:58,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:17:58,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:17:58,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:17:58,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:58" (1/1) ... [2023-03-30 22:17:58,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:17:58,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:58,828 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 22:17:58,832 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 22:17:58,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:17:58,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:17:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:17:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-30 22:17:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:17:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:17:58,854 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:17:58,854 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:17:58,854 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:17:58,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:17:58,854 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-30 22:17:58,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:17:58,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:17:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-30 22:17:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:17:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-30 22:17:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:17:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:17:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:17:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:17:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:17:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:17:58,905 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:17:58,907 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:17:58,999 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:17:59,003 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:17:59,003 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-30 22:17:59,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:17:59 BoogieIcfgContainer [2023-03-30 22:17:59,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:17:59,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:17:59,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:17:59,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:17:59,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:17:58" (1/3) ... [2023-03-30 22:17:59,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@357bd9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:17:59, skipping insertion in model container [2023-03-30 22:17:59,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:58" (2/3) ... [2023-03-30 22:17:59,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@357bd9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:17:59, skipping insertion in model container [2023-03-30 22:17:59,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:17:59" (3/3) ... [2023-03-30 22:17:59,010 INFO L112 eAbstractionObserver]: Analyzing ICFG rew.c [2023-03-30 22:17:59,020 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:17:59,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:17:59,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:17:59,053 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;@9fb5452, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:17:59,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:17:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:17:59,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-30 22:17:59,061 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:59,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:59,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:59,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:59,065 INFO L85 PathProgramCache]: Analyzing trace with hash 890576946, now seen corresponding path program 1 times [2023-03-30 22:17:59,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:59,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265598776] [2023-03-30 22:17:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:59,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:59,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:59,266 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 22:17:59,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:59,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265598776] [2023-03-30 22:17:59,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265598776] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:59,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:59,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:17:59,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128024680] [2023-03-30 22:17:59,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:59,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:17:59,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:17:59,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:17:59,301 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:17:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:59,396 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2023-03-30 22:17:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:17:59,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-03-30 22:17:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:59,401 INFO L225 Difference]: With dead ends: 43 [2023-03-30 22:17:59,402 INFO L226 Difference]: Without dead ends: 22 [2023-03-30 22:17:59,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:17:59,405 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:59,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 28 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:17:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-30 22:17:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-03-30 22:17:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:17:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-03-30 22:17:59,439 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2023-03-30 22:17:59,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:59,440 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-03-30 22:17:59,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:17:59,440 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-03-30 22:17:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-30 22:17:59,440 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:59,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:59,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:17:59,441 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:59,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2057036315, now seen corresponding path program 1 times [2023-03-30 22:17:59,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:59,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033127524] [2023-03-30 22:17:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:59,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:59,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:59,532 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 22:17:59,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:59,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033127524] [2023-03-30 22:17:59,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033127524] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:59,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:59,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:17:59,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638120453] [2023-03-30 22:17:59,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:59,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:17:59,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:59,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:17:59,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:17:59,535 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:17:59,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:59,574 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-03-30 22:17:59,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:17:59,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-03-30 22:17:59,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:59,575 INFO L225 Difference]: With dead ends: 41 [2023-03-30 22:17:59,575 INFO L226 Difference]: Without dead ends: 26 [2023-03-30 22:17:59,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 22:17:59,576 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:59,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:17:59,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-30 22:17:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-03-30 22:17:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:17:59,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-03-30 22:17:59,582 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2023-03-30 22:17:59,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:59,582 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-03-30 22:17:59,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:17:59,582 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-03-30 22:17:59,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-30 22:17:59,583 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:59,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:59,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:17:59,583 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:59,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:59,584 INFO L85 PathProgramCache]: Analyzing trace with hash 222717792, now seen corresponding path program 1 times [2023-03-30 22:17:59,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:59,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247741007] [2023-03-30 22:17:59,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:59,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:59,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:59,690 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 22:17:59,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:59,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247741007] [2023-03-30 22:17:59,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247741007] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:59,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200958555] [2023-03-30 22:17:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:59,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:59,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:59,697 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 22:17:59,703 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 22:17:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:59,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:17:59,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:59,852 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 22:17:59,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:59,896 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 22:17:59,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200958555] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:59,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:59,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:17:59,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323683363] [2023-03-30 22:17:59,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:59,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:17:59,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:17:59,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:17:59,904 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:17:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:59,975 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-03-30 22:17:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-30 22:17:59,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-03-30 22:17:59,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:59,977 INFO L225 Difference]: With dead ends: 46 [2023-03-30 22:17:59,978 INFO L226 Difference]: Without dead ends: 35 [2023-03-30 22:17:59,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:17:59,980 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:59,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 19 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:17:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-30 22:17:59,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2023-03-30 22:17:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:17:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-03-30 22:17:59,991 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2023-03-30 22:17:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:59,991 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-03-30 22:17:59,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:17:59,991 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-03-30 22:17:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:17:59,992 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:59,992 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:59,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:18:00,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:00,197 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:00,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:00,198 INFO L85 PathProgramCache]: Analyzing trace with hash -936092263, now seen corresponding path program 1 times [2023-03-30 22:18:00,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:00,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994852542] [2023-03-30 22:18:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:00,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:00,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:00,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:00,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994852542] [2023-03-30 22:18:00,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994852542] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:00,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977567424] [2023-03-30 22:18:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:00,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:00,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:00,619 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 22:18:00,623 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 22:18:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:00,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-30 22:18:00,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:00,748 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 22:18:00,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:18:00,813 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 21 treesize of output 20 [2023-03-30 22:18:00,850 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 22:18:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:00,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:01,063 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 23 treesize of output 21 [2023-03-30 22:18:01,070 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 114 treesize of output 110 [2023-03-30 22:18:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:01,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977567424] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:01,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:01,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 24 [2023-03-30 22:18:01,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93919081] [2023-03-30 22:18:01,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:01,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-03-30 22:18:01,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:01,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-03-30 22:18:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-03-30 22:18:01,123 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:18:01,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:01,370 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2023-03-30 22:18:01,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:18:01,371 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-03-30 22:18:01,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:01,378 INFO L225 Difference]: With dead ends: 39 [2023-03-30 22:18:01,379 INFO L226 Difference]: Without dead ends: 37 [2023-03-30 22:18:01,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2023-03-30 22:18:01,380 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:01,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 83 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:18:01,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-30 22:18:01,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2023-03-30 22:18:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:18:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-03-30 22:18:01,394 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 22 [2023-03-30 22:18:01,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:01,397 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-03-30 22:18:01,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:18:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-03-30 22:18:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-30 22:18:01,401 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:01,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:18:01,412 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 22:18:01,603 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 22:18:01,604 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:01,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:01,604 INFO L85 PathProgramCache]: Analyzing trace with hash 403298896, now seen corresponding path program 1 times [2023-03-30 22:18:01,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:01,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526652692] [2023-03-30 22:18:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:01,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:01,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:01,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-03-30 22:18:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:01,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:01,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526652692] [2023-03-30 22:18:01,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526652692] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:01,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628301878] [2023-03-30 22:18:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:01,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:01,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:01,890 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 22:18:01,892 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 22:18:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:01,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2023-03-30 22:18:01,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:02,008 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 22:18:02,112 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 22:18:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:02,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:02,230 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 18 treesize of output 16 [2023-03-30 22:18:02,233 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 24 treesize of output 20 [2023-03-30 22:18:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:02,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628301878] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:02,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:02,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2023-03-30 22:18:02,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630402592] [2023-03-30 22:18:02,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:02,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-30 22:18:02,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:02,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-30 22:18:02,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2023-03-30 22:18:02,282 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 26 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:18:04,344 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 22:18:06,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:08,433 WARN L539 Checker$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 22:18:10,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:12,496 WARN L539 Checker$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 22:18:14,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:16,536 WARN L539 Checker$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 22:18:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:16,736 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2023-03-30 22:18:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-30 22:18:16,737 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2023-03-30 22:18:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:16,739 INFO L225 Difference]: With dead ends: 74 [2023-03-30 22:18:16,739 INFO L226 Difference]: Without dead ends: 72 [2023-03-30 22:18:16,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2023-03-30 22:18:16,740 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 13 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:16,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 158 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 616 Invalid, 7 Unknown, 0 Unchecked, 14.3s Time] [2023-03-30 22:18:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-03-30 22:18:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 49. [2023-03-30 22:18:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 40 states have internal predecessors, (44), 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 22:18:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2023-03-30 22:18:16,746 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 30 [2023-03-30 22:18:16,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:16,746 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2023-03-30 22:18:16,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:18:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2023-03-30 22:18:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-30 22:18:16,747 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:16,747 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:18:16,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:18:16,951 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 22:18:16,951 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:16,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:16,952 INFO L85 PathProgramCache]: Analyzing trace with hash -841495093, now seen corresponding path program 2 times [2023-03-30 22:18:16,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:16,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103543970] [2023-03-30 22:18:16,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:16,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:17,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:17,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:18:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:17,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:17,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103543970] [2023-03-30 22:18:17,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103543970] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:17,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648127266] [2023-03-30 22:18:17,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:18:17,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:17,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:17,302 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 22:18:17,304 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 22:18:17,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:18:17,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:18:17,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-30 22:18:17,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:17,420 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 22:18:17,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:18:17,471 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 21 treesize of output 20 [2023-03-30 22:18:17,579 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 22:18:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:17,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:21,826 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 25 treesize of output 23 [2023-03-30 22:18:21,829 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 118 treesize of output 110 [2023-03-30 22:18:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:18:21,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648127266] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:21,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:21,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2023-03-30 22:18:21,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633806331] [2023-03-30 22:18:21,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:21,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-03-30 22:18:21,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:21,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-03-30 22:18:21,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=759, Unknown=1, NotChecked=0, Total=870 [2023-03-30 22:18:21,921 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 30 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:18:23,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:26,000 WARN L539 Checker$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 22:18:28,043 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 22:18:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:28,324 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2023-03-30 22:18:28,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-30 22:18:28,324 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2023-03-30 22:18:28,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:28,325 INFO L225 Difference]: With dead ends: 69 [2023-03-30 22:18:28,325 INFO L226 Difference]: Without dead ends: 67 [2023-03-30 22:18:28,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=186, Invalid=1295, Unknown=1, NotChecked=0, Total=1482 [2023-03-30 22:18:28,326 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 32 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:28,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 88 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 499 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2023-03-30 22:18:28,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-03-30 22:18:28,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2023-03-30 22:18:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 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 22:18:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-03-30 22:18:28,333 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 34 [2023-03-30 22:18:28,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:28,333 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-03-30 22:18:28,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:18:28,333 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-03-30 22:18:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-30 22:18:28,335 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:28,335 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:18:28,340 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 22:18:28,540 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 22:18:28,540 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:28,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:28,541 INFO L85 PathProgramCache]: Analyzing trace with hash -443633657, now seen corresponding path program 3 times [2023-03-30 22:18:28,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:28,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085171026] [2023-03-30 22:18:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:28,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:28,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:28,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-03-30 22:18:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:28,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-03-30 22:18:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:18:28,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:28,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085171026] [2023-03-30 22:18:28,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085171026] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:28,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568432223] [2023-03-30 22:18:28,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:18:28,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:28,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:28,619 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 22:18:28,621 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 22:18:28,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-30 22:18:28,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:18:28,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:18:28,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:18:28,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:18:28,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568432223] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:28,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:28,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2023-03-30 22:18:28,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798636921] [2023-03-30 22:18:28,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:28,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-30 22:18:28,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:28,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-30 22:18:28,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-03-30 22:18:28,793 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:18:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:28,922 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2023-03-30 22:18:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-30 22:18:28,922 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2023-03-30 22:18:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:28,923 INFO L225 Difference]: With dead ends: 102 [2023-03-30 22:18:28,923 INFO L226 Difference]: Without dead ends: 49 [2023-03-30 22:18:28,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-03-30 22:18:28,923 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:28,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 42 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:18:28,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-03-30 22:18:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2023-03-30 22:18:28,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 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 22:18:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-03-30 22:18:28,928 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 38 [2023-03-30 22:18:28,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:28,928 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-03-30 22:18:28,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:18:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-03-30 22:18:28,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-30 22:18:28,929 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:28,929 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:18:28,938 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 22:18:29,129 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 22:18:29,130 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:29,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:29,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1332021118, now seen corresponding path program 4 times [2023-03-30 22:18:29,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:29,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501251442] [2023-03-30 22:18:29,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:29,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:29,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:29,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:18:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:29,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-03-30 22:18:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:18:29,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:29,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501251442] [2023-03-30 22:18:29,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501251442] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:29,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525575565] [2023-03-30 22:18:29,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:18:29,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:29,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:29,401 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 22:18:29,403 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 22:18:29,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:18:29,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:18:29,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjunts are in the unsatisfiable core [2023-03-30 22:18:29,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:29,473 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 15 treesize of output 11 [2023-03-30 22:18:29,511 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 29 treesize of output 28 [2023-03-30 22:18:29,519 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 28 treesize of output 27 [2023-03-30 22:18:29,570 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 28 treesize of output 27 [2023-03-30 22:19:02,136 INFO L321 Elim1Store]: treesize reduction 112, result has 44.3 percent of original size [2023-03-30 22:19:02,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 101 [2023-03-30 22:19:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 28 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:19:02,292 INFO L327 TraceCheckSpWp]: Computing backward predicates...