./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/functions_1-1.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/functions_1-1.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReachWitnessValidation.xml -i ../sv-benchmarks/c/loop-acceleration/functions_1-1.c ../results/automizer-verification-files/SV-COMP24_unreach-call/functions_1-1.yml/witness-2.1.yml -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.positions.where.we.compute.the.hoare.annotation None --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 19:42:54,698 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 19:42:54,763 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 19:42:54,768 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 19:42:54,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 19:42:54,800 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 19:42:54,801 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 19:42:54,801 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 19:42:54,802 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 19:42:54,802 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 19:42:54,803 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 19:42:54,804 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 19:42:54,805 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 19:42:54,806 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 19:42:54,807 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 19:42:54,808 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 19:42:54,808 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 19:42:54,808 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 19:42:54,809 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 19:42:54,809 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 19:42:54,809 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 19:42:54,813 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 19:42:54,813 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 19:42:54,813 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 19:42:54,814 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 19:42:54,814 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 19:42:54,814 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 19:42:54,814 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 19:42:54,815 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 19:42:54,815 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 19:42:54,815 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 19:42:54,815 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 19:42:54,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:42:54,816 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 19:42:54,816 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 19:42:54,816 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 19:42:54,817 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 19:42:54,817 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 19:42:54,817 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 19:42:54,817 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 19:42:54,818 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 19:42:54,819 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 19:42:54,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-17 19:42:55,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 19:42:55,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 19:42:55,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 19:42:55,100 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-17 19:42:55,101 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-17 19:42:55,102 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/functions_1-1.yml/witness-2.1.yml [2024-09-17 19:42:55,177 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 19:42:55,177 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 19:42:55,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-acceleration/functions_1-1.c [2024-09-17 19:42:56,610 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 19:42:56,787 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 19:42:56,788 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-acceleration/functions_1-1.c [2024-09-17 19:42:56,793 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ce97352af/d73cbe260da74a758718596356e18614/FLAG9ffa73566 [2024-09-17 19:42:56,804 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ce97352af/d73cbe260da74a758718596356e18614 [2024-09-17 19:42:56,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 19:42:56,806 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-17 19:42:56,808 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 19:42:56,809 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 19:42:56,814 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 19:42:56,814 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:42:55" (1/2) ... [2024-09-17 19:42:56,817 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d573cdd and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 17.09 07:42:56, skipping insertion in model container [2024-09-17 19:42:56,817 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:42:55" (1/2) ... [2024-09-17 19:42:56,819 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f05e642 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 17.09 07:42:56, skipping insertion in model container [2024-09-17 19:42:56,819 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:42:56" (2/2) ... [2024-09-17 19:42:56,820 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d573cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:56, skipping insertion in model container [2024-09-17 19:42:56,820 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:42:56" (2/2) ... [2024-09-17 19:42:56,830 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-17 19:42:56,831 INFO L1541 ArrayList]: Loop invariant at [L19-L21] ((x % 2) == 0) [2024-09-17 19:42:56,832 INFO L1541 ArrayList]: Function contract at [L12]: requires null, ensures (((\old(z) % 2) != 0) || ((\result % 2) == 0)) [2024-09-17 19:42:56,835 INFO L1541 ArrayList]: Function contract at [L5]: requires (1 <= \old(cond)), ensures (1 <= \old(cond)) [2024-09-17 19:42:56,852 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 19:42:57,011 WARN L248 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-acceleration/functions_1-1.c[325,338] [2024-09-17 19:42:57,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:42:57,033 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global Start Parsing Global [2024-09-17 19:42:57,068 WARN L248 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-acceleration/functions_1-1.c[325,338] Start Parsing Global Start Parsing Local [2024-09-17 19:42:57,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:42:57,087 INFO L204 MainTranslator]: Completed translation [2024-09-17 19:42:57,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:57 WrapperNode [2024-09-17 19:42:57,087 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 19:42:57,088 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 19:42:57,088 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 19:42:57,088 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 19:42:57,093 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:57" (1/1) ... [2024-09-17 19:42:57,098 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:57" (1/1) ... [2024-09-17 19:42:57,114 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 27 [2024-09-17 19:42:57,114 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 19:42:57,115 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 19:42:57,115 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 19:42:57,115 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 19:42:57,125 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:57" (1/1) ... [2024-09-17 19:42:57,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:57" (1/1) ... [2024-09-17 19:42:57,127 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:57" (1/1) ... [2024-09-17 19:42:57,138 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]. [2024-09-17 19:42:57,138 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:57" (1/1) ... [2024-09-17 19:42:57,139 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:57" (1/1) ... [2024-09-17 19:42:57,141 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:57" (1/1) ... [2024-09-17 19:42:57,144 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:57" (1/1) ... [2024-09-17 19:42:57,145 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:57" (1/1) ... [2024-09-17 19:42:57,146 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:57" (1/1) ... [2024-09-17 19:42:57,147 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 19:42:57,148 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 19:42:57,148 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 19:42:57,148 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 19:42:57,149 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:57" (1/1) ... [2024-09-17 19:42:57,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:42:57,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:42:57,181 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) [2024-09-17 19:42:57,184 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 [2024-09-17 19:42:57,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 19:42:57,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 19:42:57,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 19:42:57,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 19:42:57,308 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 19:42:57,310 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 19:42:57,405 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-09-17 19:42:57,406 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 19:42:57,424 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 19:42:57,425 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-17 19:42:57,425 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:42:57 BoogieIcfgContainer [2024-09-17 19:42:57,425 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 19:42:57,427 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 19:42:57,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 19:42:57,431 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 19:42:57,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:42:55" (1/4) ... [2024-09-17 19:42:57,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53201182 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 17.09 07:42:57, skipping insertion in model container [2024-09-17 19:42:57,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 07:42:56" (2/4) ... [2024-09-17 19:42:57,434 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53201182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:42:57, skipping insertion in model container [2024-09-17 19:42:57,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:42:57" (3/4) ... [2024-09-17 19:42:57,435 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53201182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:42:57, skipping insertion in model container [2024-09-17 19:42:57,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:42:57" (4/4) ... [2024-09-17 19:42:57,436 INFO L112 eAbstractionObserver]: Analyzing ICFG functions_1-1.c [2024-09-17 19:42:57,456 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 19:42:57,456 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-09-17 19:42:57,504 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 19:42:57,513 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;@bef2c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 19:42:57,513 INFO L337 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-09-17 19:42:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 14 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) [2024-09-17 19:42:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-09-17 19:42:57,523 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:42:57,524 INFO L216 NwaCegarLoop]: trace histogram [1, 1] [2024-09-17 19:42:57,525 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONPOST_CONDITION, ULTIMATE.startErr2ASSERT_VIOLATIONPRE_CONDITION (and 2 more)] === [2024-09-17 19:42:57,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:42:57,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2143, now seen corresponding path program 1 times [2024-09-17 19:42:57,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:42:57,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135612597] [2024-09-17 19:42:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:42:57,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:42:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:42:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:42:57,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:42:57,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135612597] [2024-09-17 19:42:57,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135612597] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:42:57,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:42:57,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-09-17 19:42:57,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994589689] [2024-09-17 19:42:57,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:42:57,781 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-17 19:42:57,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:42:57,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-17 19:42:57,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 19:42:57,813 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 14 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) 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) [2024-09-17 19:42:57,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:42:57,861 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2024-09-17 19:42:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-17 19:42:57,864 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 [2024-09-17 19:42:57,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:42:57,870 INFO L225 Difference]: With dead ends: 17 [2024-09-17 19:42:57,870 INFO L226 Difference]: Without dead ends: 16 [2024-09-17 19:42:57,872 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 [2024-09-17 19:42:57,875 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:42:57,876 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:42:57,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-17 19:42:57,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-17 19:42:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 15 states have internal predecessors, (16), 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) [2024-09-17 19:42:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2024-09-17 19:42:57,927 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 2 [2024-09-17 19:42:57,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:42:57,927 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2024-09-17 19:42:57,927 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) [2024-09-17 19:42:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2024-09-17 19:42:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-09-17 19:42:57,928 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:42:57,928 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-09-17 19:42:57,944 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 19:42:57,945 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONPOST_CONDITION, ULTIMATE.startErr2ASSERT_VIOLATIONPRE_CONDITION (and 2 more)] === [2024-09-17 19:42:57,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:42:57,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2060802, now seen corresponding path program 1 times [2024-09-17 19:42:57,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:42:57,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806753704] [2024-09-17 19:42:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:42:57,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:42:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:42:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:42:58,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:42:58,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806753704] [2024-09-17 19:42:58,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806753704] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:42:58,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:42:58,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-17 19:42:58,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897541723] [2024-09-17 19:42:58,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:42:58,169 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 19:42:58,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:42:58,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 19:42:58,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 19:42:58,172 INFO L87 Difference]: Start difference. First operand 16 states and 16 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) [2024-09-17 19:42:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:42:58,202 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2024-09-17 19:42:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 19:42:58,203 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 [2024-09-17 19:42:58,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:42:58,203 INFO L225 Difference]: With dead ends: 17 [2024-09-17 19:42:58,203 INFO L226 Difference]: Without dead ends: 17 [2024-09-17 19:42:58,204 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 19:42:58,205 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:42:58,205 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:42:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-17 19:42:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-17 19:42:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 16 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) [2024-09-17 19:42:58,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2024-09-17 19:42:58,212 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 4 [2024-09-17 19:42:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:42:58,213 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2024-09-17 19:42:58,213 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) [2024-09-17 19:42:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2024-09-17 19:42:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-17 19:42:58,214 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:42:58,214 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-17 19:42:58,214 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 19:42:58,215 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONPOST_CONDITION, ULTIMATE.startErr2ASSERT_VIOLATIONPRE_CONDITION (and 2 more)] === [2024-09-17 19:42:58,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:42:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash 63884897, now seen corresponding path program 1 times [2024-09-17 19:42:58,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:42:58,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056368694] [2024-09-17 19:42:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:42:58,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:42:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:42:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:42:58,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:42:58,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056368694] [2024-09-17 19:42:58,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056368694] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:42:58,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813580272] [2024-09-17 19:42:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:42:58,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:42:58,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:42:58,401 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) [2024-09-17 19:42:58,403 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 19:42:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:42:58,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-17 19:42:58,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:42:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:42:58,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:42:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:42:58,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813580272] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-17 19:42:58,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:42:58,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 6 [2024-09-17 19:42:58,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036260344] [2024-09-17 19:42:58,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:42:58,591 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 19:42:58,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:42:58,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 19:42:58,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-17 19:42:58,593 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-09-17 19:42:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:42:58,618 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2024-09-17 19:42:58,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 19:42:58,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2024-09-17 19:42:58,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:42:58,619 INFO L225 Difference]: With dead ends: 16 [2024-09-17 19:42:58,619 INFO L226 Difference]: Without dead ends: 16 [2024-09-17 19:42:58,620 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-17 19:42:58,622 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 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 [2024-09-17 19:42:58,623 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:42:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-17 19:42:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-17 19:42:58,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 15 states have internal predecessors, (16), 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) [2024-09-17 19:42:58,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2024-09-17 19:42:58,628 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 5 [2024-09-17 19:42:58,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:42:58,629 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2024-09-17 19:42:58,629 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-09-17 19:42:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2024-09-17 19:42:58,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-09-17 19:42:58,631 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:42:58,631 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2024-09-17 19:42:58,649 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 19:42:58,835 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:42:58,836 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONPOST_CONDITION, ULTIMATE.startErr2ASSERT_VIOLATIONPRE_CONDITION (and 2 more)] === [2024-09-17 19:42:58,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:42:58,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1263845252, now seen corresponding path program 1 times [2024-09-17 19:42:58,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:42:58,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984090956] [2024-09-17 19:42:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:42:58,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:42:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:42:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:42:58,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:42:58,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984090956] [2024-09-17 19:42:58,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984090956] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:42:58,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630653215] [2024-09-17 19:42:58,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:42:58,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:42:58,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:42:58,986 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) [2024-09-17 19:42:58,988 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 19:42:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:42:59,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-17 19:42:59,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:42:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:42:59,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:42:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 19:42:59,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630653215] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-17 19:42:59,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:42:59,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 7 [2024-09-17 19:42:59,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28981952] [2024-09-17 19:42:59,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:42:59,110 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 19:42:59,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:42:59,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 19:42:59,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-17 19:42:59,111 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-09-17 19:42:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:42:59,130 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2024-09-17 19:42:59,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 19:42:59,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 7 [2024-09-17 19:42:59,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:42:59,132 INFO L225 Difference]: With dead ends: 15 [2024-09-17 19:42:59,133 INFO L226 Difference]: Without dead ends: 15 [2024-09-17 19:42:59,133 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-17 19:42:59,134 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:42:59,134 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:42:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-17 19:42:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2024-09-17 19:42:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 states have internal predecessors, (14), 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) [2024-09-17 19:42:59,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2024-09-17 19:42:59,139 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 7 [2024-09-17 19:42:59,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:42:59,139 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2024-09-17 19:42:59,139 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-09-17 19:42:59,139 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2024-09-17 19:42:59,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-17 19:42:59,140 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:42:59,140 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-09-17 19:42:59,156 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-17 19:42:59,340 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:42:59,341 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONPRE_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONPOST_CONDITION, ULTIMATE.startErr2ASSERT_VIOLATIONPRE_CONDITION (and 2 more)] === [2024-09-17 19:42:59,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:42:59,342 INFO L85 PathProgramCache]: Analyzing trace with hash 524495402, now seen corresponding path program 1 times [2024-09-17 19:42:59,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:42:59,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787330320] [2024-09-17 19:42:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:42:59,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:42:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:42:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:42:59,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:42:59,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787330320] [2024-09-17 19:42:59,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787330320] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:42:59,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:42:59,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-17 19:42:59,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913658467] [2024-09-17 19:42:59,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:42:59,389 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 19:42:59,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:42:59,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 19:42:59,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 19:42:59,391 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-09-17 19:42:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:42:59,414 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2024-09-17 19:42:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 19:42:59,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2024-09-17 19:42:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:42:59,415 INFO L225 Difference]: With dead ends: 12 [2024-09-17 19:42:59,415 INFO L226 Difference]: Without dead ends: 11 [2024-09-17 19:42:59,415 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 19:42:59,416 INFO L434 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:42:59,416 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:42:59,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-09-17 19:42:59,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-09-17 19:42:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 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) [2024-09-17 19:42:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2024-09-17 19:42:59,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2024-09-17 19:42:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:42:59,420 INFO L474 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2024-09-17 19:42:59,420 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-09-17 19:42:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2024-09-17 19:42:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-17 19:42:59,421 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:42:59,421 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:42:59,421 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-17 19:42:59,422 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONPOST_CONDITION, ULTIMATE.startErr2ASSERT_VIOLATIONPRE_CONDITION (and 2 more)] === [2024-09-17 19:42:59,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:42:59,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1528909453, now seen corresponding path program 1 times [2024-09-17 19:42:59,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:42:59,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218938310] [2024-09-17 19:42:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:42:59,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:42:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:42:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 19:42:59,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:42:59,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218938310] [2024-09-17 19:42:59,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218938310] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:42:59,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:42:59,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-17 19:42:59,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027378091] [2024-09-17 19:42:59,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:42:59,470 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-17 19:42:59,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:42:59,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-17 19:42:59,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 19:42:59,470 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-09-17 19:42:59,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:42:59,474 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2024-09-17 19:42:59,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-17 19:42:59,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2024-09-17 19:42:59,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:42:59,475 INFO L225 Difference]: With dead ends: 9 [2024-09-17 19:42:59,475 INFO L226 Difference]: Without dead ends: 0 [2024-09-17 19:42:59,475 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 19:42:59,476 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:42:59,476 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:42:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-17 19:42:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-17 19:42:59,477 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) [2024-09-17 19:42:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-17 19:42:59,477 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2024-09-17 19:42:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:42:59,477 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-17 19:42:59,477 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-09-17 19:42:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-17 19:42:59,477 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-17 19:42:59,480 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-09-17 19:42:59,481 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONPOST_CONDITION (3 of 5 remaining) [2024-09-17 19:42:59,481 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONPRE_CONDITION (2 of 5 remaining) [2024-09-17 19:42:59,481 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-09-17 19:42:59,482 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONPOST_CONDITION (0 of 5 remaining) [2024-09-17 19:42:59,482 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-17 19:42:59,485 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-09-17 19:42:59,487 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-17 19:42:59,489 INFO L469 ceAbstractionStarter]: Automizer considered 1 witness invariants [2024-09-17 19:42:59,489 INFO L470 ceAbstractionStarter]: WitnessConsidered=1 [2024-09-17 19:42:59,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 07:42:59 BoogieIcfgContainer [2024-09-17 19:42:59,490 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-17 19:42:59,491 INFO L158 Benchmark]: Toolchain (without parser) took 2685.20ms. Allocated memory was 155.2MB in the beginning and 201.3MB in the end (delta: 46.1MB). Free memory was 80.9MB in the beginning and 92.0MB in the end (delta: -11.1MB). Peak memory consumption was 34.2MB. Max. memory is 16.1GB. [2024-09-17 19:42:59,491 INFO L158 Benchmark]: Witness Parser took 0.21ms. Allocated memory is still 155.2MB. Free memory was 106.3MB in the beginning and 106.1MB in the end (delta: 159.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:42:59,491 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 155.2MB. Free memory is still 126.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:42:59,492 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.01ms. Allocated memory is still 155.2MB. Free memory was 80.7MB in the beginning and 67.8MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-17 19:42:59,492 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.16ms. Allocated memory is still 155.2MB. Free memory was 67.8MB in the beginning and 66.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 19:42:59,492 INFO L158 Benchmark]: Boogie Preprocessor took 32.28ms. Allocated memory is still 155.2MB. Free memory was 66.2MB in the beginning and 64.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:42:59,493 INFO L158 Benchmark]: RCFGBuilder took 277.61ms. Allocated memory was 155.2MB in the beginning and 201.3MB in the end (delta: 46.1MB). Free memory was 64.6MB in the beginning and 165.8MB in the end (delta: -101.2MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. [2024-09-17 19:42:59,493 INFO L158 Benchmark]: TraceAbstraction took 2063.10ms. Allocated memory is still 201.3MB. Free memory was 164.8MB in the beginning and 92.0MB in the end (delta: 72.8MB). Peak memory consumption was 71.8MB. Max. memory is 16.1GB. [2024-09-17 19:42:59,494 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 0.21ms. Allocated memory is still 155.2MB. Free memory was 106.3MB in the beginning and 106.1MB in the end (delta: 159.6kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.10ms. Allocated memory is still 155.2MB. Free memory is still 126.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.01ms. Allocated memory is still 155.2MB. Free memory was 80.7MB in the beginning and 67.8MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.16ms. Allocated memory is still 155.2MB. Free memory was 67.8MB in the beginning and 66.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.28ms. Allocated memory is still 155.2MB. Free memory was 66.2MB in the beginning and 64.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 277.61ms. Allocated memory was 155.2MB in the beginning and 201.3MB in the end (delta: 46.1MB). Free memory was 64.6MB in the beginning and 165.8MB in the end (delta: -101.2MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. * TraceAbstraction took 2063.10ms. Allocated memory is still 201.3MB. Free memory was 164.8MB in the beginning and 92.0MB in the end (delta: 72.8MB). Peak memory consumption was 71.8MB. 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: 19]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 12]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - PositiveResult [Line: 5]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 7]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 5]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 2.0s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 99 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 56 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 71 IncrementalHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 43 mSDtfsCounter, 71 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=2, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 181 SizeOfPredicates, 2 NumberOfNonLiveVariables, 83 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 8/16 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! [2024-09-17 19:42:59,522 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE