This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 10:14:05,195 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 10:14:05,265 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 10:14:05,271 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 10:14:05,271 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 10:14:05,300 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 10:14:05,301 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 10:14:05,301 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 10:14:05,302 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 10:14:05,303 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 10:14:05,303 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 10:14:05,304 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 10:14:05,322 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 10:14:05,327 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 10:14:05,327 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 10:14:05,327 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 10:14:05,328 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 10:14:05,328 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 10:14:05,328 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 10:14:05,328 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 10:14:05,328 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 10:14:05,329 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 10:14:05,330 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 10:14:05,331 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 10:14:05,331 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 10:14:05,331 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 10:14:05,331 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 10:14:05,331 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 10:14:05,332 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 10:14:05,332 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 10:14:05,332 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 10:14:05,332 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 10:14:05,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:14:05,333 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 10:14:05,333 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 10:14:05,333 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 10:14:05,333 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 10:14:05,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 10:14:05,334 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 10:14:05,334 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 10:14:05,335 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 10:14:05,337 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 10:14:05,337 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 10:14:05,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 10:14:05,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 10:14:05,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 10:14:05,652 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 10:14:05,652 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 10:14:05,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/nested_4.yml/witness-2.1.yml [2024-09-13 10:14:05,714 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 10:14:05,714 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 10:14:05,715 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-simple/nested_4.c [2024-09-13 10:14:07,121 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 10:14:07,339 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 10:14:07,339 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-simple/nested_4.c [2024-09-13 10:14:07,345 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/84df26943/044861d6bb5a4be09386fb668d4c88f2/FLAGac25c0b7f [2024-09-13 10:14:07,726 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/84df26943/044861d6bb5a4be09386fb668d4c88f2 [2024-09-13 10:14:07,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 10:14:07,728 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 10:14:07,729 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 10:14:07,729 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 10:14:07,735 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 10:14:07,735 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:14:05" (1/2) ... [2024-09-13 10:14:07,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143084dd and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:14:07, skipping insertion in model container [2024-09-13 10:14:07,737 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:14:05" (1/2) ... [2024-09-13 10:14:07,738 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@71e11a5c and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:14:07, skipping insertion in model container [2024-09-13 10:14:07,739 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:14:07" (2/2) ... [2024-09-13 10:14:07,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143084dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:07, skipping insertion in model container [2024-09-13 10:14:07,739 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:14:07" (2/2) ... [2024-09-13 10:14:07,745 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 10:14:07,749 INFO L1541 ArrayList]: Loop invariant at [L24-L28] (((((((((b <= 5) && (a <= 5)) && (c == 1)) || (((b <= 5) && (5 == c)) && (a <= 5))) || (((b <= 5) && (a <= 5)) && (c == 3))) || ((((c == 6) && (b <= 5)) && (d == 6)) && (a <= 5))) || (((b <= 5) && (c == 0)) && (a <= 5))) || (((b <= 5) && (c == 2)) && (a <= 5))) || (((b <= 5) && (c == 4)) && (a <= 5))) [2024-09-13 10:14:07,749 INFO L1541 ArrayList]: Loop invariant at [L25-L27] (((((((((((((((b <= 5) && (5 == c)) && (d == 1)) && (a <= 5)) || ((((b <= 5) && (d == 3)) && (5 == c)) && (a <= 5))) || (((b <= 5) && (a <= 5)) && (c == 1))) || ((((d == 4) && (b <= 5)) && (5 == c)) && (a <= 5))) || ((((d == 0) && (b <= 5)) && (5 == c)) && (a <= 5))) || (((b <= 5) && (a <= 5)) && (c == 3))) || ((((b <= 5) && (5 == c)) && (d == 2)) && (a <= 5))) || (((b <= 5) && (c == 0)) && (a <= 5))) || ((((b <= 5) && (5 == c)) && (d == 6)) && (a <= 5))) || (((b <= 5) && (c == 2)) && (a <= 5))) || (((b <= 5) && (c == 4)) && (a <= 5))) || ((((b <= 5) && (5 == c)) && (5 == d)) && (a <= 5))) [2024-09-13 10:14:07,749 INFO L1541 ArrayList]: Loop invariant at [L22-L30] ((((b == 6) && (c == 6)) && (a <= 6)) && (d == 6)) [2024-09-13 10:14:07,749 INFO L1541 ArrayList]: Loop invariant at [L23-L29] ((((c == 6) && (b <= 6)) && (d == 6)) && (a <= 5)) [2024-09-13 10:14:07,767 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 10:14:07,931 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2024-09-13 10:14:07,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:14:07,948 INFO L200 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-09-13 10:14:08,000 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2024-09-13 10:14:08,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:14:08,017 INFO L204 MainTranslator]: Completed translation [2024-09-13 10:14:08,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:08 WrapperNode [2024-09-13 10:14:08,018 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 10:14:08,019 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 10:14:08,019 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 10:14:08,019 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 10:14:08,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:08" (1/1) ... [2024-09-13 10:14:08,032 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:08" (1/1) ... [2024-09-13 10:14:08,060 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2024-09-13 10:14:08,060 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 10:14:08,061 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 10:14:08,061 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 10:14:08,061 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 10:14:08,076 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:08" (1/1) ... [2024-09-13 10:14:08,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:08" (1/1) ... [2024-09-13 10:14:08,079 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:08" (1/1) ... [2024-09-13 10:14:08,099 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-13 10:14:08,099 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:08" (1/1) ... [2024-09-13 10:14:08,099 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:08" (1/1) ... [2024-09-13 10:14:08,103 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:08" (1/1) ... [2024-09-13 10:14:08,110 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:08" (1/1) ... [2024-09-13 10:14:08,115 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:08" (1/1) ... [2024-09-13 10:14:08,116 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:08" (1/1) ... [2024-09-13 10:14:08,117 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 10:14:08,120 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 10:14:08,122 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 10:14:08,122 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 10:14:08,123 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:08" (1/1) ... [2024-09-13 10:14:08,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:14:08,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:08,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 10:14:08,180 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 10:14:08,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 10:14:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 10:14:08,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 10:14:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 10:14:08,322 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 10:14:08,323 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 10:14:08,470 INFO L? ?]: Removed 26 outVars from TransFormulas that were not future-live. [2024-09-13 10:14:08,471 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 10:14:08,492 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 10:14:08,492 INFO L318 CfgBuilder]: Removed 4 assume(true) statements. [2024-09-13 10:14:08,493 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:14:08 BoogieIcfgContainer [2024-09-13 10:14:08,493 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 10:14:08,495 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 10:14:08,495 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 10:14:08,498 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 10:14:08,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:14:05" (1/4) ... [2024-09-13 10:14:08,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21fdc6c9 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 10:14:08, skipping insertion in model container [2024-09-13 10:14:08,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 10:14:07" (2/4) ... [2024-09-13 10:14:08,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21fdc6c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:14:08, skipping insertion in model container [2024-09-13 10:14:08,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:08" (3/4) ... [2024-09-13 10:14:08,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21fdc6c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:14:08, skipping insertion in model container [2024-09-13 10:14:08,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:14:08" (4/4) ... [2024-09-13 10:14:08,501 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_4.c [2024-09-13 10:14:08,516 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 10:14:08,516 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-09-13 10:14:08,549 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 10:14:08,555 INFO L336 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@53f6b5cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 10:14:08,555 INFO L337 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-09-13 10:14:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:08,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-09-13 10:14:08,565 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:08,566 INFO L216 NwaCegarLoop]: trace histogram [1, 1] [2024-09-13 10:14:08,567 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:08,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash 3228, now seen corresponding path program 1 times [2024-09-13 10:14:08,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:08,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120908751] [2024-09-13 10:14:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:08,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:08,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:08,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120908751] [2024-09-13 10:14:08,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120908751] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:08,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:08,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-09-13 10:14:08,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294733457] [2024-09-13 10:14:08,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:08,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 10:14:08,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 10:14:08,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 10:14:08,864 INFO L87 Difference]: Start difference. First operand has 21 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:08,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:08,947 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-09-13 10:14:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 10:14:08,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2024-09-13 10:14:08,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:08,957 INFO L225 Difference]: With dead ends: 23 [2024-09-13 10:14:08,958 INFO L226 Difference]: Without dead ends: 21 [2024-09-13 10:14:08,960 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 10:14:08,965 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:08,967 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:08,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-13 10:14:08,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-13 10:14:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-09-13 10:14:08,990 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 2 [2024-09-13 10:14:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:08,991 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-09-13 10:14:08,991 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-09-13 10:14:08,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-09-13 10:14:08,992 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:08,992 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-09-13 10:14:08,992 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 10:14:08,993 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:08,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:08,993 INFO L85 PathProgramCache]: Analyzing trace with hash 3103455, now seen corresponding path program 1 times [2024-09-13 10:14:08,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:08,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605829862] [2024-09-13 10:14:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:08,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:09,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:09,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605829862] [2024-09-13 10:14:09,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605829862] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:09,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:09,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 10:14:09,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853679347] [2024-09-13 10:14:09,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:09,142 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:14:09,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:09,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:14:09,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:14:09,143 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:09,216 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-09-13 10:14:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 10:14:09,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-09-13 10:14:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:09,218 INFO L225 Difference]: With dead ends: 23 [2024-09-13 10:14:09,219 INFO L226 Difference]: Without dead ends: 23 [2024-09-13 10:14:09,220 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:14:09,221 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:09,222 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-13 10:14:09,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-13 10:14:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-09-13 10:14:09,227 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 4 [2024-09-13 10:14:09,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:09,228 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-09-13 10:14:09,228 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:09,228 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-09-13 10:14:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-09-13 10:14:09,229 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:09,229 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-09-13 10:14:09,229 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 10:14:09,229 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:09,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:09,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1312545374, now seen corresponding path program 1 times [2024-09-13 10:14:09,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:09,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773857237] [2024-09-13 10:14:09,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:09,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:09,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:09,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773857237] [2024-09-13 10:14:09,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773857237] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:09,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:09,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 10:14:09,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041885351] [2024-09-13 10:14:09,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:09,355 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:14:09,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:09,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:14:09,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:14:09,359 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:09,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:09,446 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2024-09-13 10:14:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:14:09,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-09-13 10:14:09,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:09,448 INFO L225 Difference]: With dead ends: 43 [2024-09-13 10:14:09,448 INFO L226 Difference]: Without dead ends: 43 [2024-09-13 10:14:09,449 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:14:09,450 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:09,451 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 21 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-13 10:14:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2024-09-13 10:14:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-09-13 10:14:09,455 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 6 [2024-09-13 10:14:09,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:09,455 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-09-13 10:14:09,456 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-09-13 10:14:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-13 10:14:09,456 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:09,457 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:09,457 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 10:14:09,457 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:09,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:09,458 INFO L85 PathProgramCache]: Analyzing trace with hash 67394922, now seen corresponding path program 1 times [2024-09-13 10:14:09,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:09,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636291406] [2024-09-13 10:14:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:09,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:09,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:09,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636291406] [2024-09-13 10:14:09,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636291406] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:09,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:09,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 10:14:09,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490907824] [2024-09-13 10:14:09,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:09,555 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 10:14:09,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:09,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 10:14:09,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 10:14:09,562 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:09,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:09,594 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2024-09-13 10:14:09,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 10:14:09,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-09-13 10:14:09,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:09,596 INFO L225 Difference]: With dead ends: 31 [2024-09-13 10:14:09,596 INFO L226 Difference]: Without dead ends: 31 [2024-09-13 10:14:09,596 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 10:14:09,598 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:09,598 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:09,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-13 10:14:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-13 10:14:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-09-13 10:14:09,603 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2024-09-13 10:14:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:09,603 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-09-13 10:14:09,603 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:09,603 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-09-13 10:14:09,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-13 10:14:09,611 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:09,611 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:09,611 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-13 10:14:09,612 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:09,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:09,612 INFO L85 PathProgramCache]: Analyzing trace with hash 373963442, now seen corresponding path program 1 times [2024-09-13 10:14:09,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:09,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866989196] [2024-09-13 10:14:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:09,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:09,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:09,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866989196] [2024-09-13 10:14:09,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866989196] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:09,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918570344] [2024-09-13 10:14:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:09,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:09,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:09,699 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:09,700 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 10:14:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:09,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-13 10:14:09,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:09,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:09,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918570344] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:09,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:09,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-13 10:14:09,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199684700] [2024-09-13 10:14:09,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:09,837 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 10:14:09,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:09,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 10:14:09,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-13 10:14:09,838 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:09,889 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2024-09-13 10:14:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:14:09,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-09-13 10:14:09,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:09,892 INFO L225 Difference]: With dead ends: 43 [2024-09-13 10:14:09,892 INFO L226 Difference]: Without dead ends: 43 [2024-09-13 10:14:09,893 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-13 10:14:09,894 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:09,896 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:09,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-13 10:14:09,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-13 10:14:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-09-13 10:14:09,905 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 13 [2024-09-13 10:14:09,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:09,905 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-09-13 10:14:09,906 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:09,906 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-09-13 10:14:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-13 10:14:09,907 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:09,907 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:09,921 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-13 10:14:10,108 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:10,108 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:10,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:10,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1895868042, now seen corresponding path program 2 times [2024-09-13 10:14:10,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:10,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889067732] [2024-09-13 10:14:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:10,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:10,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:10,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889067732] [2024-09-13 10:14:10,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889067732] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:10,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568438106] [2024-09-13 10:14:10,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:14:10,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:10,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:10,291 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:10,292 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 10:14:10,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:14:10,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:10,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 10:14:10,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:10,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:10,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568438106] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:10,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:10,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-09-13 10:14:10,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314013184] [2024-09-13 10:14:10,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:10,418 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 10:14:10,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:10,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 10:14:10,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-13 10:14:10,419 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:10,456 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2024-09-13 10:14:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 10:14:10,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-09-13 10:14:10,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:10,459 INFO L225 Difference]: With dead ends: 51 [2024-09-13 10:14:10,459 INFO L226 Difference]: Without dead ends: 51 [2024-09-13 10:14:10,459 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-13 10:14:10,460 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:10,460 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-13 10:14:10,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-13 10:14:10,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.326086956521739) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-09-13 10:14:10,468 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 19 [2024-09-13 10:14:10,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:10,468 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-09-13 10:14:10,468 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:10,469 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-09-13 10:14:10,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-13 10:14:10,469 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:10,469 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:10,483 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 10:14:10,670 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 10:14:10,670 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:10,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:10,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1140891418, now seen corresponding path program 3 times [2024-09-13 10:14:10,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:10,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15478890] [2024-09-13 10:14:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:10,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 10:14:10,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:10,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15478890] [2024-09-13 10:14:10,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15478890] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:10,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914453907] [2024-09-13 10:14:10,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 10:14:10,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:10,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:10,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:10,864 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 10:14:10,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-13 10:14:10,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:10,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 10:14:10,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 10:14:11,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 10:14:11,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914453907] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:11,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:11,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2024-09-13 10:14:11,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80682229] [2024-09-13 10:14:11,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:11,236 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 10:14:11,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:11,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 10:14:11,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2024-09-13 10:14:11,237 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:11,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:11,455 INFO L93 Difference]: Finished difference Result 235 states and 288 transitions. [2024-09-13 10:14:11,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 10:14:11,456 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-09-13 10:14:11,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:11,457 INFO L225 Difference]: With dead ends: 235 [2024-09-13 10:14:11,457 INFO L226 Difference]: Without dead ends: 235 [2024-09-13 10:14:11,458 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2024-09-13 10:14:11,459 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 146 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:11,459 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 39 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:14:11,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-09-13 10:14:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 229. [2024-09-13 10:14:11,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2544642857142858) internal successors, (281), 228 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 281 transitions. [2024-09-13 10:14:11,482 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 281 transitions. Word has length 23 [2024-09-13 10:14:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:11,482 INFO L474 AbstractCegarLoop]: Abstraction has 229 states and 281 transitions. [2024-09-13 10:14:11,483 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 281 transitions. [2024-09-13 10:14:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-13 10:14:11,483 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:11,484 INFO L216 NwaCegarLoop]: trace histogram [14, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:11,496 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 10:14:11,684 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 10:14:11,684 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:11,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:11,685 INFO L85 PathProgramCache]: Analyzing trace with hash 159859874, now seen corresponding path program 4 times [2024-09-13 10:14:11,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:11,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908078105] [2024-09-13 10:14:11,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:11,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 10:14:11,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:11,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908078105] [2024-09-13 10:14:11,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908078105] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:11,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801430934] [2024-09-13 10:14:11,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 10:14:11,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:11,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:11,960 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:11,961 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 10:14:12,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 10:14:12,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:12,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 10:14:12,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 10:14:12,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 10:14:12,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801430934] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:12,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:12,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2024-09-13 10:14:12,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038140166] [2024-09-13 10:14:12,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:12,512 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 10:14:12,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 10:14:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2024-09-13 10:14:12,514 INFO L87 Difference]: Start difference. First operand 229 states and 281 transitions. Second operand has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:12,776 INFO L93 Difference]: Finished difference Result 303 states and 360 transitions. [2024-09-13 10:14:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 10:14:12,777 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-09-13 10:14:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:12,778 INFO L225 Difference]: With dead ends: 303 [2024-09-13 10:14:12,779 INFO L226 Difference]: Without dead ends: 303 [2024-09-13 10:14:12,779 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2024-09-13 10:14:12,780 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 111 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:12,781 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 54 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:14:12,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2024-09-13 10:14:12,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 297. [2024-09-13 10:14:12,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.2089041095890412) internal successors, (353), 296 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 353 transitions. [2024-09-13 10:14:12,800 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 353 transitions. Word has length 40 [2024-09-13 10:14:12,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:12,801 INFO L474 AbstractCegarLoop]: Abstraction has 297 states and 353 transitions. [2024-09-13 10:14:12,801 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:12,801 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 353 transitions. [2024-09-13 10:14:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-13 10:14:12,805 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:12,805 INFO L216 NwaCegarLoop]: trace histogram [21, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:12,823 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 10:14:13,005 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:13,006 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:13,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:13,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1258332134, now seen corresponding path program 5 times [2024-09-13 10:14:13,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:13,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961512383] [2024-09-13 10:14:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:13,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-13 10:14:13,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:13,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961512383] [2024-09-13 10:14:13,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961512383] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:13,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272656997] [2024-09-13 10:14:13,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 10:14:13,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:13,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:13,408 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:13,409 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 10:14:13,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-09-13 10:14:13,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:13,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 10:14:13,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-13 10:14:13,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-13 10:14:14,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272656997] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:14,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:14,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2024-09-13 10:14:14,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613648568] [2024-09-13 10:14:14,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:14,128 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 10:14:14,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:14,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 10:14:14,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2024-09-13 10:14:14,129 INFO L87 Difference]: Start difference. First operand 297 states and 353 transitions. Second operand has 20 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:14,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:14,393 INFO L93 Difference]: Finished difference Result 371 states and 432 transitions. [2024-09-13 10:14:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 10:14:14,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-09-13 10:14:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:14,395 INFO L225 Difference]: With dead ends: 371 [2024-09-13 10:14:14,395 INFO L226 Difference]: Without dead ends: 371 [2024-09-13 10:14:14,396 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2024-09-13 10:14:14,396 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 163 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:14,397 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 58 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:14:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2024-09-13 10:14:14,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 365. [2024-09-13 10:14:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 1.1805555555555556) internal successors, (425), 364 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 425 transitions. [2024-09-13 10:14:14,416 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 425 transitions. Word has length 57 [2024-09-13 10:14:14,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:14,416 INFO L474 AbstractCegarLoop]: Abstraction has 365 states and 425 transitions. [2024-09-13 10:14:14,416 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:14,416 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 425 transitions. [2024-09-13 10:14:14,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-13 10:14:14,425 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:14,425 INFO L216 NwaCegarLoop]: trace histogram [28, 24, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:14,445 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-13 10:14:14,625 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:14,626 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:14,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:14,626 INFO L85 PathProgramCache]: Analyzing trace with hash -272456798, now seen corresponding path program 6 times [2024-09-13 10:14:14,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:14,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442371364] [2024-09-13 10:14:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:14,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-09-13 10:14:15,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:15,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442371364] [2024-09-13 10:14:15,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442371364] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:15,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238014688] [2024-09-13 10:14:15,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 10:14:15,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:15,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:15,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:15,035 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 10:14:15,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-13 10:14:15,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:15,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 10:14:15,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2024-09-13 10:14:15,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:14:15,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238014688] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:15,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:14:15,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 14 [2024-09-13 10:14:15,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850597224] [2024-09-13 10:14:15,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:15,546 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 10:14:15,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 10:14:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2024-09-13 10:14:15,550 INFO L87 Difference]: Start difference. First operand 365 states and 425 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:15,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:15,608 INFO L93 Difference]: Finished difference Result 365 states and 409 transitions. [2024-09-13 10:14:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:14:15,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-09-13 10:14:15,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:15,611 INFO L225 Difference]: With dead ends: 365 [2024-09-13 10:14:15,612 INFO L226 Difference]: Without dead ends: 365 [2024-09-13 10:14:15,612 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2024-09-13 10:14:15,613 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:15,614 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:15,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2024-09-13 10:14:15,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 337. [2024-09-13 10:14:15,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 332 states have (on average 1.141566265060241) internal successors, (379), 336 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 379 transitions. [2024-09-13 10:14:15,621 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 379 transitions. Word has length 74 [2024-09-13 10:14:15,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:15,621 INFO L474 AbstractCegarLoop]: Abstraction has 337 states and 379 transitions. [2024-09-13 10:14:15,621 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:15,621 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 379 transitions. [2024-09-13 10:14:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-13 10:14:15,622 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:15,622 INFO L216 NwaCegarLoop]: trace histogram [28, 24, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:15,639 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 10:14:15,823 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 10:14:15,823 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:15,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:15,824 INFO L85 PathProgramCache]: Analyzing trace with hash 727780469, now seen corresponding path program 1 times [2024-09-13 10:14:15,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:15,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998515844] [2024-09-13 10:14:15,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:15,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2024-09-13 10:14:16,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:16,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998515844] [2024-09-13 10:14:16,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998515844] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:16,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871902632] [2024-09-13 10:14:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:16,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:16,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:16,328 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:16,330 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 10:14:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:16,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 10:14:16,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 1 proven. 614 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-09-13 10:14:16,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 1 proven. 614 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-09-13 10:14:16,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871902632] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:16,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:16,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 13 [2024-09-13 10:14:16,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120273530] [2024-09-13 10:14:16,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:16,641 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-13 10:14:16,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:16,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-13 10:14:16,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2024-09-13 10:14:16,642 INFO L87 Difference]: Start difference. First operand 337 states and 379 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:16,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:16,897 INFO L93 Difference]: Finished difference Result 513 states and 614 transitions. [2024-09-13 10:14:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 10:14:16,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2024-09-13 10:14:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:16,901 INFO L225 Difference]: With dead ends: 513 [2024-09-13 10:14:16,901 INFO L226 Difference]: Without dead ends: 513 [2024-09-13 10:14:16,901 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2024-09-13 10:14:16,902 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:16,903 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 27 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2024-09-13 10:14:16,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 512. [2024-09-13 10:14:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 507 states have (on average 1.2090729783037475) internal successors, (613), 511 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 613 transitions. [2024-09-13 10:14:16,912 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 613 transitions. Word has length 77 [2024-09-13 10:14:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:16,912 INFO L474 AbstractCegarLoop]: Abstraction has 512 states and 613 transitions. [2024-09-13 10:14:16,912 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 613 transitions. [2024-09-13 10:14:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-09-13 10:14:16,915 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:16,915 INFO L216 NwaCegarLoop]: trace histogram [70, 60, 11, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:16,935 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 10:14:17,115 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:17,116 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:17,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 3530168, now seen corresponding path program 1 times [2024-09-13 10:14:17,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:17,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749642675] [2024-09-13 10:14:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:17,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4998 backedges. 2439 proven. 610 refuted. 0 times theorem prover too weak. 1949 trivial. 0 not checked. [2024-09-13 10:14:17,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:17,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749642675] [2024-09-13 10:14:17,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749642675] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:17,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931601068] [2024-09-13 10:14:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:17,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:17,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:17,768 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:17,770 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 10:14:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:17,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-13 10:14:17,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4998 backedges. 2440 proven. 610 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2024-09-13 10:14:18,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4998 backedges. 2440 proven. 610 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2024-09-13 10:14:18,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931601068] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:18,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:18,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2024-09-13 10:14:18,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135859028] [2024-09-13 10:14:18,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:18,781 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 10:14:18,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:18,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 10:14:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-09-13 10:14:18,782 INFO L87 Difference]: Start difference. First operand 512 states and 613 transitions. Second operand has 14 states, 13 states have (on average 6.076923076923077) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:18,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:18,943 INFO L93 Difference]: Finished difference Result 515 states and 569 transitions. [2024-09-13 10:14:18,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 10:14:18,943 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 6.076923076923077) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2024-09-13 10:14:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:18,945 INFO L225 Difference]: With dead ends: 515 [2024-09-13 10:14:18,945 INFO L226 Difference]: Without dead ends: 515 [2024-09-13 10:14:18,946 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 353 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-09-13 10:14:18,946 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:18,947 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 46 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:14:18,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2024-09-13 10:14:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 448. [2024-09-13 10:14:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 443 states have (on average 1.1241534988713318) internal successors, (498), 447 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 498 transitions. [2024-09-13 10:14:18,954 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 498 transitions. Word has length 181 [2024-09-13 10:14:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:18,954 INFO L474 AbstractCegarLoop]: Abstraction has 448 states and 498 transitions. [2024-09-13 10:14:18,954 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 6.076923076923077) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 498 transitions. [2024-09-13 10:14:18,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2024-09-13 10:14:18,956 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:18,956 INFO L216 NwaCegarLoop]: trace histogram [77, 66, 12, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:18,975 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 10:14:19,157 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:19,157 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:19,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:19,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1153390020, now seen corresponding path program 2 times [2024-09-13 10:14:19,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:19,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040924500] [2024-09-13 10:14:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:19,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 3047 proven. 1015 refuted. 0 times theorem prover too weak. 1991 trivial. 0 not checked. [2024-09-13 10:14:19,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:19,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040924500] [2024-09-13 10:14:19,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040924500] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:19,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548190653] [2024-09-13 10:14:19,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:14:19,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:19,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:19,863 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:19,865 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 10:14:19,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:14:19,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:19,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-13 10:14:19,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 3048 proven. 1015 refuted. 0 times theorem prover too weak. 1990 trivial. 0 not checked. [2024-09-13 10:14:20,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 3048 proven. 1015 refuted. 0 times theorem prover too weak. 1990 trivial. 0 not checked. [2024-09-13 10:14:20,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548190653] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:20,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:20,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-09-13 10:14:20,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137962045] [2024-09-13 10:14:20,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:20,836 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 10:14:20,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:20,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 10:14:20,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-09-13 10:14:20,837 INFO L87 Difference]: Start difference. First operand 448 states and 498 transitions. Second operand has 16 states, 15 states have (on average 6.066666666666666) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:21,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:21,066 INFO L93 Difference]: Finished difference Result 508 states and 574 transitions. [2024-09-13 10:14:21,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 10:14:21,067 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.066666666666666) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2024-09-13 10:14:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:21,069 INFO L225 Difference]: With dead ends: 508 [2024-09-13 10:14:21,070 INFO L226 Difference]: Without dead ends: 508 [2024-09-13 10:14:21,070 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 386 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-09-13 10:14:21,071 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:21,071 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 76 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:14:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2024-09-13 10:14:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 448. [2024-09-13 10:14:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 443 states have (on average 1.1196388261851016) internal successors, (496), 447 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 496 transitions. [2024-09-13 10:14:21,078 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 496 transitions. Word has length 198 [2024-09-13 10:14:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:21,078 INFO L474 AbstractCegarLoop]: Abstraction has 448 states and 496 transitions. [2024-09-13 10:14:21,078 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.066666666666666) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 496 transitions. [2024-09-13 10:14:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-09-13 10:14:21,080 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:21,080 INFO L216 NwaCegarLoop]: trace histogram [77, 66, 13, 12, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:21,098 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 10:14:21,284 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-13 10:14:21,285 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:21,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:21,285 INFO L85 PathProgramCache]: Analyzing trace with hash 306248839, now seen corresponding path program 1 times [2024-09-13 10:14:21,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:21,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369513775] [2024-09-13 10:14:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:21,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6142 backedges. 3136 proven. 0 refuted. 0 times theorem prover too weak. 3006 trivial. 0 not checked. [2024-09-13 10:14:22,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:22,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369513775] [2024-09-13 10:14:22,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369513775] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:22,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:22,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 10:14:22,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508896957] [2024-09-13 10:14:22,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:22,098 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:14:22,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:14:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:14:22,099 INFO L87 Difference]: Start difference. First operand 448 states and 496 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:22,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:22,145 INFO L93 Difference]: Finished difference Result 448 states and 495 transitions. [2024-09-13 10:14:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:14:22,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2024-09-13 10:14:22,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:22,147 INFO L225 Difference]: With dead ends: 448 [2024-09-13 10:14:22,148 INFO L226 Difference]: Without dead ends: 448 [2024-09-13 10:14:22,148 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:14:22,148 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:22,149 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2024-09-13 10:14:22,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2024-09-13 10:14:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 443 states have (on average 1.1173814898419865) internal successors, (495), 447 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 495 transitions. [2024-09-13 10:14:22,155 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 495 transitions. Word has length 200 [2024-09-13 10:14:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:22,156 INFO L474 AbstractCegarLoop]: Abstraction has 448 states and 495 transitions. [2024-09-13 10:14:22,156 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:22,156 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 495 transitions. [2024-09-13 10:14:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-09-13 10:14:22,158 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:22,158 INFO L216 NwaCegarLoop]: trace histogram [78, 67, 13, 12, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:22,159 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-09-13 10:14:22,159 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:22,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:22,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2047605825, now seen corresponding path program 2 times [2024-09-13 10:14:22,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:22,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774234579] [2024-09-13 10:14:22,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:22,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6297 backedges. 3290 proven. 1 refuted. 0 times theorem prover too weak. 3006 trivial. 0 not checked. [2024-09-13 10:14:23,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:23,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774234579] [2024-09-13 10:14:23,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774234579] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:23,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956511025] [2024-09-13 10:14:23,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:14:23,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:23,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:23,071 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:23,074 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 10:14:23,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:14:23,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:23,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 10:14:23,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6297 backedges. 3291 proven. 1 refuted. 0 times theorem prover too weak. 3005 trivial. 0 not checked. [2024-09-13 10:14:23,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6297 backedges. 243 proven. 1 refuted. 0 times theorem prover too weak. 6053 trivial. 0 not checked. [2024-09-13 10:14:23,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956511025] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:23,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:23,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 14 [2024-09-13 10:14:23,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732526776] [2024-09-13 10:14:23,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:23,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 10:14:23,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:23,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 10:14:23,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2024-09-13 10:14:23,830 INFO L87 Difference]: Start difference. First operand 448 states and 495 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:24,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:24,214 INFO L93 Difference]: Finished difference Result 448 states and 492 transitions. [2024-09-13 10:14:24,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 10:14:24,215 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2024-09-13 10:14:24,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:24,217 INFO L225 Difference]: With dead ends: 448 [2024-09-13 10:14:24,217 INFO L226 Difference]: Without dead ends: 448 [2024-09-13 10:14:24,218 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2024-09-13 10:14:24,219 INFO L434 NwaCegarLoop]: 2 mSDtfsCounter, 64 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:24,219 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 11 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:24,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2024-09-13 10:14:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2024-09-13 10:14:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 443 states have (on average 1.110609480812641) internal successors, (492), 447 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 492 transitions. [2024-09-13 10:14:24,227 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 492 transitions. Word has length 202 [2024-09-13 10:14:24,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:24,228 INFO L474 AbstractCegarLoop]: Abstraction has 448 states and 492 transitions. [2024-09-13 10:14:24,228 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:24,228 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 492 transitions. [2024-09-13 10:14:24,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2024-09-13 10:14:24,230 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:24,231 INFO L216 NwaCegarLoop]: trace histogram [79, 68, 13, 12, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:24,248 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 10:14:24,431 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 10:14:24,432 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:24,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:24,432 INFO L85 PathProgramCache]: Analyzing trace with hash -654172937, now seen corresponding path program 3 times [2024-09-13 10:14:24,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:24,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567793384] [2024-09-13 10:14:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:24,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6454 backedges. 3444 proven. 4 refuted. 0 times theorem prover too weak. 3006 trivial. 0 not checked. [2024-09-13 10:14:25,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:25,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567793384] [2024-09-13 10:14:25,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567793384] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:25,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710329287] [2024-09-13 10:14:25,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 10:14:25,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:25,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:25,333 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:25,339 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 10:14:25,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 10:14:25,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:25,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 10:14:25,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6454 backedges. 3440 proven. 4 refuted. 0 times theorem prover too weak. 3010 trivial. 0 not checked. [2024-09-13 10:14:25,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6454 backedges. 385 proven. 4 refuted. 0 times theorem prover too weak. 6065 trivial. 0 not checked. [2024-09-13 10:14:26,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710329287] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:26,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:26,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 17 [2024-09-13 10:14:26,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958597137] [2024-09-13 10:14:26,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:26,145 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 10:14:26,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:26,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 10:14:26,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-09-13 10:14:26,146 INFO L87 Difference]: Start difference. First operand 448 states and 492 transitions. Second operand has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:27,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:27,073 INFO L93 Difference]: Finished difference Result 448 states and 490 transitions. [2024-09-13 10:14:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-13 10:14:27,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2024-09-13 10:14:27,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:27,075 INFO L225 Difference]: With dead ends: 448 [2024-09-13 10:14:27,075 INFO L226 Difference]: Without dead ends: 448 [2024-09-13 10:14:27,076 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 10:14:27,076 INFO L434 NwaCegarLoop]: 2 mSDtfsCounter, 83 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:27,076 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 15 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:14:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2024-09-13 10:14:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2024-09-13 10:14:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 443 states have (on average 1.1060948081264108) internal successors, (490), 447 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 490 transitions. [2024-09-13 10:14:27,083 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 490 transitions. Word has length 204 [2024-09-13 10:14:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:27,083 INFO L474 AbstractCegarLoop]: Abstraction has 448 states and 490 transitions. [2024-09-13 10:14:27,084 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:27,084 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 490 transitions. [2024-09-13 10:14:27,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-09-13 10:14:27,085 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:27,085 INFO L216 NwaCegarLoop]: trace histogram [80, 69, 13, 12, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:27,102 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-13 10:14:27,286 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 10:14:27,286 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:27,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:27,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1594963921, now seen corresponding path program 4 times [2024-09-13 10:14:27,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:27,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109970260] [2024-09-13 10:14:27,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:27,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 3598 proven. 9 refuted. 0 times theorem prover too weak. 3006 trivial. 0 not checked. [2024-09-13 10:14:28,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:28,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109970260] [2024-09-13 10:14:28,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109970260] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:28,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113300165] [2024-09-13 10:14:28,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 10:14:28,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:28,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:28,250 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:28,250 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 10:14:28,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 10:14:28,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:28,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-13 10:14:28,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 3599 proven. 9 refuted. 0 times theorem prover too weak. 3005 trivial. 0 not checked. [2024-09-13 10:14:28,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 551 proven. 9 refuted. 0 times theorem prover too weak. 6053 trivial. 0 not checked. [2024-09-13 10:14:29,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113300165] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:29,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:29,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 20 [2024-09-13 10:14:29,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470489127] [2024-09-13 10:14:29,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:29,210 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 10:14:29,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:29,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 10:14:29,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2024-09-13 10:14:29,211 INFO L87 Difference]: Start difference. First operand 448 states and 490 transitions. Second operand has 21 states, 20 states have (on average 3.9) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:29,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:29,750 INFO L93 Difference]: Finished difference Result 448 states and 488 transitions. [2024-09-13 10:14:29,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 10:14:29,750 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.9) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2024-09-13 10:14:29,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:29,751 INFO L225 Difference]: With dead ends: 448 [2024-09-13 10:14:29,752 INFO L226 Difference]: Without dead ends: 448 [2024-09-13 10:14:29,752 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=827, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 10:14:29,752 INFO L434 NwaCegarLoop]: 2 mSDtfsCounter, 76 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:29,753 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 10 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:14:29,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2024-09-13 10:14:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2024-09-13 10:14:29,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 443 states have (on average 1.1015801354401806) internal successors, (488), 447 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 488 transitions. [2024-09-13 10:14:29,759 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 488 transitions. Word has length 206 [2024-09-13 10:14:29,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:29,759 INFO L474 AbstractCegarLoop]: Abstraction has 448 states and 488 transitions. [2024-09-13 10:14:29,759 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.9) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:29,760 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 488 transitions. [2024-09-13 10:14:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-09-13 10:14:29,761 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:29,761 INFO L216 NwaCegarLoop]: trace histogram [81, 70, 13, 12, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:29,779 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-13 10:14:29,962 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 10:14:29,962 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:29,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:29,963 INFO L85 PathProgramCache]: Analyzing trace with hash 542999911, now seen corresponding path program 5 times [2024-09-13 10:14:29,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:29,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261073777] [2024-09-13 10:14:29,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:29,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6774 backedges. 3752 proven. 16 refuted. 0 times theorem prover too weak. 3006 trivial. 0 not checked. [2024-09-13 10:14:30,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:30,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261073777] [2024-09-13 10:14:30,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261073777] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:30,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680554188] [2024-09-13 10:14:30,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 10:14:30,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:30,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:30,904 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:30,906 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 10:14:31,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2024-09-13 10:14:31,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:31,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-13 10:14:31,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6774 backedges. 320 proven. 3450 refuted. 0 times theorem prover too weak. 3004 trivial. 0 not checked. [2024-09-13 10:14:31,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6774 backedges. 705 proven. 16 refuted. 0 times theorem prover too weak. 6053 trivial. 0 not checked. [2024-09-13 10:14:32,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680554188] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:32,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:32,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 24 [2024-09-13 10:14:32,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062415148] [2024-09-13 10:14:32,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:32,206 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 10:14:32,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:32,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 10:14:32,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2024-09-13 10:14:32,207 INFO L87 Difference]: Start difference. First operand 448 states and 488 transitions. Second operand has 25 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:33,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:33,768 INFO L93 Difference]: Finished difference Result 661 states and 721 transitions. [2024-09-13 10:14:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-09-13 10:14:33,768 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2024-09-13 10:14:33,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:33,770 INFO L225 Difference]: With dead ends: 661 [2024-09-13 10:14:33,770 INFO L226 Difference]: Without dead ends: 661 [2024-09-13 10:14:33,771 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1071, Invalid=4935, Unknown=0, NotChecked=0, Total=6006 [2024-09-13 10:14:33,772 INFO L434 NwaCegarLoop]: 2 mSDtfsCounter, 198 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:33,772 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 19 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 10:14:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2024-09-13 10:14:33,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 555. [2024-09-13 10:14:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 550 states have (on average 1.0981818181818181) internal successors, (604), 554 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 604 transitions. [2024-09-13 10:14:33,779 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 604 transitions. Word has length 208 [2024-09-13 10:14:33,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:33,780 INFO L474 AbstractCegarLoop]: Abstraction has 555 states and 604 transitions. [2024-09-13 10:14:33,780 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 604 transitions. [2024-09-13 10:14:33,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2024-09-13 10:14:33,782 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:33,782 INFO L216 NwaCegarLoop]: trace histogram [82, 71, 13, 12, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:33,800 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-13 10:14:33,982 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-13 10:14:33,983 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:33,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:33,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2131874975, now seen corresponding path program 6 times [2024-09-13 10:14:33,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:33,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931028661] [2024-09-13 10:14:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:33,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6937 backedges. 3906 proven. 25 refuted. 0 times theorem prover too weak. 3006 trivial. 0 not checked. [2024-09-13 10:14:34,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:34,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931028661] [2024-09-13 10:14:34,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931028661] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:34,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351167212] [2024-09-13 10:14:34,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 10:14:34,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:34,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:34,920 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:34,923 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 10:14:34,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 10:14:34,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:34,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-13 10:14:35,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6937 backedges. 3916 proven. 0 refuted. 0 times theorem prover too weak. 3021 trivial. 0 not checked. [2024-09-13 10:14:35,492 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:14:35,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351167212] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:35,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:14:35,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2024-09-13 10:14:35,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468836466] [2024-09-13 10:14:35,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:35,493 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 10:14:35,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:35,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 10:14:35,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2024-09-13 10:14:35,493 INFO L87 Difference]: Start difference. First operand 555 states and 604 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:35,542 INFO L93 Difference]: Finished difference Result 554 states and 598 transitions. [2024-09-13 10:14:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 10:14:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2024-09-13 10:14:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:35,544 INFO L225 Difference]: With dead ends: 554 [2024-09-13 10:14:35,544 INFO L226 Difference]: Without dead ends: 554 [2024-09-13 10:14:35,544 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2024-09-13 10:14:35,545 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:35,545 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:35,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2024-09-13 10:14:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2024-09-13 10:14:35,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 550 states have (on average 1.0872727272727272) internal successors, (598), 553 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 598 transitions. [2024-09-13 10:14:35,552 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 598 transitions. Word has length 210 [2024-09-13 10:14:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:35,553 INFO L474 AbstractCegarLoop]: Abstraction has 554 states and 598 transitions. [2024-09-13 10:14:35,553 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 598 transitions. [2024-09-13 10:14:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2024-09-13 10:14:35,554 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:35,555 INFO L216 NwaCegarLoop]: trace histogram [84, 72, 13, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:35,573 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 10:14:35,758 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:35,759 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:35,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:35,759 INFO L85 PathProgramCache]: Analyzing trace with hash 472610616, now seen corresponding path program 3 times [2024-09-13 10:14:35,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:35,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40948534] [2024-09-13 10:14:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:35,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 3655 proven. 1563 refuted. 0 times theorem prover too weak. 1991 trivial. 0 not checked. [2024-09-13 10:14:36,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:36,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40948534] [2024-09-13 10:14:36,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40948534] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:36,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408491422] [2024-09-13 10:14:36,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 10:14:36,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:36,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:36,784 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:36,786 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 10:14:36,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-13 10:14:36,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:36,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 10:14:36,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 4163 proven. 0 refuted. 0 times theorem prover too weak. 3046 trivial. 0 not checked. [2024-09-13 10:14:37,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:14:37,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408491422] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:37,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:14:37,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 23 [2024-09-13 10:14:37,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071517991] [2024-09-13 10:14:37,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:37,318 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 10:14:37,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:37,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 10:14:37,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2024-09-13 10:14:37,319 INFO L87 Difference]: Start difference. First operand 554 states and 598 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:37,381 INFO L93 Difference]: Finished difference Result 553 states and 595 transitions. [2024-09-13 10:14:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 10:14:37,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2024-09-13 10:14:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:37,384 INFO L225 Difference]: With dead ends: 553 [2024-09-13 10:14:37,384 INFO L226 Difference]: Without dead ends: 553 [2024-09-13 10:14:37,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2024-09-13 10:14:37,385 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:37,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:37,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2024-09-13 10:14:37,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2024-09-13 10:14:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 550 states have (on average 1.0818181818181818) internal successors, (595), 552 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 595 transitions. [2024-09-13 10:14:37,392 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 595 transitions. Word has length 215 [2024-09-13 10:14:37,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:37,393 INFO L474 AbstractCegarLoop]: Abstraction has 553 states and 595 transitions. [2024-09-13 10:14:37,393 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:37,393 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 595 transitions. [2024-09-13 10:14:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2024-09-13 10:14:37,394 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:37,394 INFO L216 NwaCegarLoop]: trace histogram [84, 72, 14, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1] [2024-09-13 10:14:37,410 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-13 10:14:37,597 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:37,598 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:37,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:37,598 INFO L85 PathProgramCache]: Analyzing trace with hash 640125215, now seen corresponding path program 2 times [2024-09-13 10:14:37,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:37,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667273271] [2024-09-13 10:14:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:37,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3658 proven. 13 refuted. 0 times theorem prover too weak. 3554 trivial. 0 not checked. [2024-09-13 10:14:38,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:38,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667273271] [2024-09-13 10:14:38,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667273271] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:38,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169273634] [2024-09-13 10:14:38,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:14:38,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:38,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:38,472 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:38,473 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 10:14:38,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:14:38,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:38,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 10:14:38,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 6 proven. 3667 refuted. 0 times theorem prover too weak. 3552 trivial. 0 not checked. [2024-09-13 10:14:39,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 7209 trivial. 0 not checked. [2024-09-13 10:14:39,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169273634] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:39,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-13 10:14:39,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 7] total 15 [2024-09-13 10:14:39,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906137854] [2024-09-13 10:14:39,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:39,109 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:14:39,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:39,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:14:39,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-09-13 10:14:39,110 INFO L87 Difference]: Start difference. First operand 553 states and 595 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:39,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:39,139 INFO L93 Difference]: Finished difference Result 553 states and 591 transitions. [2024-09-13 10:14:39,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:14:39,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2024-09-13 10:14:39,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:39,141 INFO L225 Difference]: With dead ends: 553 [2024-09-13 10:14:39,141 INFO L226 Difference]: Without dead ends: 553 [2024-09-13 10:14:39,141 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-09-13 10:14:39,142 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:39,143 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 7 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:39,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2024-09-13 10:14:39,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2024-09-13 10:14:39,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 550 states have (on average 1.0745454545454545) internal successors, (591), 552 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 591 transitions. [2024-09-13 10:14:39,150 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 591 transitions. Word has length 218 [2024-09-13 10:14:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:39,150 INFO L474 AbstractCegarLoop]: Abstraction has 553 states and 591 transitions. [2024-09-13 10:14:39,150 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 591 transitions. [2024-09-13 10:14:39,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2024-09-13 10:14:39,152 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:39,152 INFO L216 NwaCegarLoop]: trace histogram [126, 108, 21, 18, 18, 18, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:39,171 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-13 10:14:39,352 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:39,353 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:39,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:39,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1579747050, now seen corresponding path program 1 times [2024-09-13 10:14:39,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:39,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488618345] [2024-09-13 10:14:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:39,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16339 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 16335 trivial. 0 not checked. [2024-09-13 10:14:39,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:39,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488618345] [2024-09-13 10:14:39,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488618345] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:39,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559586543] [2024-09-13 10:14:39,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:39,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:39,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:39,848 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:14:39,851 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 10:14:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:40,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-13 10:14:40,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16339 backedges. 1 proven. 11001 refuted. 0 times theorem prover too weak. 5337 trivial. 0 not checked. [2024-09-13 10:14:40,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16339 backedges. 1 proven. 11001 refuted. 0 times theorem prover too weak. 5337 trivial. 0 not checked. [2024-09-13 10:14:40,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559586543] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:40,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:40,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2024-09-13 10:14:40,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647127767] [2024-09-13 10:14:40,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:40,658 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 10:14:40,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:40,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 10:14:40,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-09-13 10:14:40,659 INFO L87 Difference]: Start difference. First operand 553 states and 591 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:40,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:40,841 INFO L93 Difference]: Finished difference Result 1302 states and 1388 transitions. [2024-09-13 10:14:40,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 10:14:40,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 328 [2024-09-13 10:14:40,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:40,846 INFO L225 Difference]: With dead ends: 1302 [2024-09-13 10:14:40,846 INFO L226 Difference]: Without dead ends: 1302 [2024-09-13 10:14:40,846 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 646 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2024-09-13 10:14:40,847 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:40,848 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2024-09-13 10:14:40,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2024-09-13 10:14:40,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1299 states have (on average 1.0685142417244033) internal successors, (1388), 1301 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:40,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1388 transitions. [2024-09-13 10:14:40,872 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1388 transitions. Word has length 328 [2024-09-13 10:14:40,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:40,873 INFO L474 AbstractCegarLoop]: Abstraction has 1302 states and 1388 transitions. [2024-09-13 10:14:40,873 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1388 transitions. [2024-09-13 10:14:40,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2024-09-13 10:14:40,877 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:40,877 INFO L216 NwaCegarLoop]: trace histogram [252, 216, 42, 36, 36, 36, 7, 6, 6, 6, 2, 2, 1, 1, 1, 1] [2024-09-13 10:14:40,896 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-13 10:14:41,077 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:41,078 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:41,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:41,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2059498109, now seen corresponding path program 1 times [2024-09-13 10:14:41,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:41,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623368617] [2024-09-13 10:14:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:41,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 65670 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 65655 trivial. 0 not checked. [2024-09-13 10:14:41,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:41,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623368617] [2024-09-13 10:14:41,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623368617] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:41,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:41,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 10:14:41,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118861225] [2024-09-13 10:14:41,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:41,715 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:14:41,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:41,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:14:41,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:14:41,717 INFO L87 Difference]: Start difference. First operand 1302 states and 1388 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:41,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:41,739 INFO L93 Difference]: Finished difference Result 1301 states and 1387 transitions. [2024-09-13 10:14:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 10:14:41,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 651 [2024-09-13 10:14:41,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:41,744 INFO L225 Difference]: With dead ends: 1301 [2024-09-13 10:14:41,744 INFO L226 Difference]: Without dead ends: 1301 [2024-09-13 10:14:41,745 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:14:41,745 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:41,745 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2024-09-13 10:14:41,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1301. [2024-09-13 10:14:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1299 states have (on average 1.0677444187836798) internal successors, (1387), 1300 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1387 transitions. [2024-09-13 10:14:41,765 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1387 transitions. Word has length 651 [2024-09-13 10:14:41,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:41,766 INFO L474 AbstractCegarLoop]: Abstraction has 1301 states and 1387 transitions. [2024-09-13 10:14:41,766 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:41,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1387 transitions. [2024-09-13 10:14:41,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1297 [2024-09-13 10:14:41,776 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:41,777 INFO L216 NwaCegarLoop]: trace histogram [504, 432, 84, 72, 72, 72, 14, 12, 12, 12, 2, 2, 2, 2, 1, 1] [2024-09-13 10:14:41,777 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-09-13 10:14:41,777 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:41,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:41,778 INFO L85 PathProgramCache]: Analyzing trace with hash 230534172, now seen corresponding path program 2 times [2024-09-13 10:14:41,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:41,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115436916] [2024-09-13 10:14:41,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:41,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 263293 backedges. 131975 proven. 0 refuted. 0 times theorem prover too weak. 131318 trivial. 0 not checked. [2024-09-13 10:14:43,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:43,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115436916] [2024-09-13 10:14:43,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115436916] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:43,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:43,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 10:14:43,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914419760] [2024-09-13 10:14:43,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:43,637 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:14:43,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:43,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:14:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:14:43,638 INFO L87 Difference]: Start difference. First operand 1301 states and 1387 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:43,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:43,674 INFO L93 Difference]: Finished difference Result 1300 states and 1386 transitions. [2024-09-13 10:14:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:14:43,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1296 [2024-09-13 10:14:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:43,679 INFO L225 Difference]: With dead ends: 1300 [2024-09-13 10:14:43,679 INFO L226 Difference]: Without dead ends: 1300 [2024-09-13 10:14:43,679 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:14:43,679 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:43,680 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:43,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2024-09-13 10:14:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1300. [2024-09-13 10:14:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 1.0669745958429562) internal successors, (1386), 1299 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1386 transitions. [2024-09-13 10:14:43,696 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1386 transitions. Word has length 1296 [2024-09-13 10:14:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:43,697 INFO L474 AbstractCegarLoop]: Abstraction has 1300 states and 1386 transitions. [2024-09-13 10:14:43,697 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1386 transitions. [2024-09-13 10:14:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1300 [2024-09-13 10:14:43,707 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:43,708 INFO L216 NwaCegarLoop]: trace histogram [504, 432, 84, 72, 72, 72, 14, 12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1] [2024-09-13 10:14:43,708 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-09-13 10:14:43,708 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 2 more)] === [2024-09-13 10:14:43,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:43,709 INFO L85 PathProgramCache]: Analyzing trace with hash 190853134, now seen corresponding path program 1 times [2024-09-13 10:14:43,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:43,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076313735] [2024-09-13 10:14:43,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:43,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 263295 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 263277 trivial. 0 not checked. [2024-09-13 10:14:45,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:45,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076313735] [2024-09-13 10:14:45,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076313735] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:45,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:45,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-13 10:14:45,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157562059] [2024-09-13 10:14:45,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:45,372 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:14:45,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:45,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:14:45,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:14:45,373 INFO L87 Difference]: Start difference. First operand 1300 states and 1386 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:45,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:45,405 INFO L93 Difference]: Finished difference Result 1298 states and 1384 transitions. [2024-09-13 10:14:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:14:45,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1299 [2024-09-13 10:14:45,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:45,408 INFO L225 Difference]: With dead ends: 1298 [2024-09-13 10:14:45,408 INFO L226 Difference]: Without dead ends: 0 [2024-09-13 10:14:45,408 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:14:45,409 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:45,409 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-13 10:14:45,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-13 10:14:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-13 10:14:45,410 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1299 [2024-09-13 10:14:45,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:45,411 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-13 10:14:45,411 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:14:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-13 10:14:45,411 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-13 10:14:45,414 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-09-13 10:14:45,414 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-09-13 10:14:45,415 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 5 remaining) [2024-09-13 10:14:45,415 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 5 remaining) [2024-09-13 10:14:45,415 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-09-13 10:14:45,415 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-09-13 10:14:45,418 INFO L408 BasicCegarLoop]: Path program histogram: [6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:45,420 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 10:14:45,422 INFO L469 ceAbstractionStarter]: Automizer considered 4 witness invariants [2024-09-13 10:14:45,422 INFO L470 ceAbstractionStarter]: WitnessConsidered=4 [2024-09-13 10:14:45,423 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 10:14:45 BoogieIcfgContainer [2024-09-13 10:14:45,423 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 10:14:45,423 INFO L158 Benchmark]: Toolchain (without parser) took 37695.41ms. Allocated memory was 155.2MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 123.6MB in the beginning and 1.0GB in the end (delta: -920.7MB). Peak memory consumption was 225.1MB. Max. memory is 16.1GB. [2024-09-13 10:14:45,423 INFO L158 Benchmark]: Witness Parser took 0.31ms. Allocated memory is still 155.2MB. Free memory is still 120.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:14:45,424 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 155.2MB. Free memory is still 118.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:14:45,424 INFO L158 Benchmark]: CACSL2BoogieTranslator took 289.38ms. Allocated memory is still 155.2MB. Free memory was 123.6MB in the beginning and 109.9MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-13 10:14:45,424 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.25ms. Allocated memory is still 155.2MB. Free memory was 109.9MB in the beginning and 108.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:14:45,424 INFO L158 Benchmark]: Boogie Preprocessor took 58.70ms. Allocated memory is still 155.2MB. Free memory was 108.6MB in the beginning and 106.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 10:14:45,425 INFO L158 Benchmark]: RCFGBuilder took 372.68ms. Allocated memory is still 155.2MB. Free memory was 106.5MB in the beginning and 116.0MB in the end (delta: -9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-09-13 10:14:45,425 INFO L158 Benchmark]: TraceAbstraction took 36928.13ms. Allocated memory was 155.2MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 115.2MB in the beginning and 1.0GB in the end (delta: -929.0MB). Peak memory consumption was 218.7MB. Max. memory is 16.1GB. [2024-09-13 10:14:45,426 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.31ms. Allocated memory is still 155.2MB. Free memory is still 120.6MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 155.2MB. Free memory is still 118.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 289.38ms. Allocated memory is still 155.2MB. Free memory was 123.6MB in the beginning and 109.9MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.25ms. Allocated memory is still 155.2MB. Free memory was 109.9MB in the beginning and 108.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 58.70ms. Allocated memory is still 155.2MB. Free memory was 108.6MB in the beginning and 106.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 372.68ms. Allocated memory is still 155.2MB. Free memory was 106.5MB in the beginning and 116.0MB in the end (delta: -9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 36928.13ms. Allocated memory was 155.2MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 115.2MB in the beginning and 1.0GB in the end (delta: -929.0MB). Peak memory consumption was 218.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 22]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 23]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 24]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 25]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 32]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 36.9s, OverallIterations: 25, TraceHistogramMax: 504, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.1s, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1036 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1036 mSDsluCounter, 643 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 415 mSDsCounter, 379 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3651 IncrementalHoareTripleChecker+Invalid, 4030 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 379 mSolverCounterUnsat, 228 mSDtfsCounter, 3651 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4696 GetRequests, 4290 SyntacticMatches, 12 SemanticMatches, 394 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3980 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1302occurred in iteration=22, InterpolantAutomatonStates: 371, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 296 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 24.0s InterpolantComputationTime, 8415 NumberOfCodeBlocks, 7801 NumberOfCodeBlocksAsserted, 96 NumberOfCheckSat, 10333 ConstructedInterpolants, 0 QuantifiedInterpolants, 39924 SizeOfPredicates, 11 NumberOfNonLiveVariables, 4228 ConjunctsInSsa, 201 ConjunctsInUnsatCore, 56 InterpolantComputations, 12 PerfectInterpolantSequences, 776106/814915 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-13 10:14:45,456 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...