./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/nested_3.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/nested_3.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1d5fa637 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-simple/nested_3.c ../results/automizer-verification-files/SV-COMP24_unreach-call/nested_3.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-dev-1d5fa63-m [2024-09-13 10:14:04,466 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 10:14:04,540 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 10:14:04,544 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 10:14:04,545 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 10:14:04,562 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 10:14:04,563 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 10:14:04,563 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 10:14:04,563 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 10:14:04,564 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 10:14:04,564 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 10:14:04,565 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 10:14:04,565 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 10:14:04,565 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 10:14:04,566 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 10:14:04,567 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 10:14:04,567 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 10:14:04,567 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 10:14:04,568 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 10:14:04,568 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 10:14:04,568 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 10:14:04,571 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 10:14:04,571 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 10:14:04,572 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 10:14:04,574 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 10:14:04,575 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 10:14:04,575 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 10:14:04,575 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 10:14:04,575 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 10:14:04,576 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 10:14:04,576 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 10:14:04,576 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 10:14:04,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:14:04,576 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 10:14:04,577 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 10:14:04,577 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 10:14:04,577 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 10:14:04,577 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 10:14:04,577 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 10:14:04,578 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 10:14:04,579 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 10:14:04,579 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 10:14:04,579 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 10:14:04,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 10:14:04,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 10:14:04,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 10:14:04,862 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 10:14:04,863 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 10:14:04,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/nested_3.yml/witness-2.1.yml [2024-09-13 10:14:04,918 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 10:14:04,918 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 10:14:04,919 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-simple/nested_3.c [2024-09-13 10:14:06,227 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 10:14:06,408 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 10:14:06,410 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-simple/nested_3.c [2024-09-13 10:14:06,418 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/3c8107929/9a6a4bfbc35046b192c96d5b4fc4446f/FLAG476ad8ef3 [2024-09-13 10:14:06,435 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/3c8107929/9a6a4bfbc35046b192c96d5b4fc4446f [2024-09-13 10:14:06,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 10:14:06,437 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 10:14:06,439 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 10:14:06,440 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 10:14:06,445 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 10:14:06,446 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 10:14:04" (1/2) ... [2024-09-13 10:14:06,446 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d0d6e1 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:14:06, skipping insertion in model container [2024-09-13 10:14:06,448 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 10:14:04" (1/2) ... [2024-09-13 10:14:06,450 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@377ed8c9 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:14:06, skipping insertion in model container [2024-09-13 10:14:06,450 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:14:06" (2/2) ... [2024-09-13 10:14:06,450 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d0d6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06, skipping insertion in model container [2024-09-13 10:14:06,450 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:14:06" (2/2) ... [2024-09-13 10:14:06,456 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 10:14:06,459 INFO L1541 ArrayList]: Loop invariant at [L22-L26] (((c == 6) && (b <= 6)) && (a <= 5)) [2024-09-13 10:14:06,459 INFO L1541 ArrayList]: Loop invariant at [L21-L27] (((b == 6) && (c == 6)) && (a <= 6)) [2024-09-13 10:14:06,459 INFO L1541 ArrayList]: Loop invariant at [L23-L25] (((((((((b <= 5) && (a <= 5)) && (c == 1)) || (((b <= 5) && (5 == c)) && (a <= 5))) || (((c == 6) && (b <= 5)) && (a <= 5))) || (((b <= 5) && (a <= 5)) && (c == 3))) || (((b <= 5) && (c == 0)) && (a <= 5))) || (((b <= 5) && (c == 2)) && (a <= 5))) || (((b <= 5) && (c == 4)) && (a <= 5))) [2024-09-13 10:14:06,479 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 10:14:06,623 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_3.c[784,797] [2024-09-13 10:14:06,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:14:06,643 INFO L200 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local [2024-09-13 10:14:06,708 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_3.c[784,797] [2024-09-13 10:14:06,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:14:06,724 INFO L204 MainTranslator]: Completed translation [2024-09-13 10:14:06,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06 WrapperNode [2024-09-13 10:14:06,725 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 10:14:06,726 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 10:14:06,727 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 10:14:06,727 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 10:14:06,735 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06" (1/1) ... [2024-09-13 10:14:06,740 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06" (1/1) ... [2024-09-13 10:14:06,757 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 40 [2024-09-13 10:14:06,758 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 10:14:06,758 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 10:14:06,758 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 10:14:06,759 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 10:14:06,769 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06" (1/1) ... [2024-09-13 10:14:06,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06" (1/1) ... [2024-09-13 10:14:06,771 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06" (1/1) ... [2024-09-13 10:14:06,781 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 10:14:06,782 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06" (1/1) ... [2024-09-13 10:14:06,782 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06" (1/1) ... [2024-09-13 10:14:06,785 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06" (1/1) ... [2024-09-13 10:14:06,790 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06" (1/1) ... [2024-09-13 10:14:06,791 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06" (1/1) ... [2024-09-13 10:14:06,791 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06" (1/1) ... [2024-09-13 10:14:06,793 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 10:14:06,796 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 10:14:06,796 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 10:14:06,796 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 10:14:06,797 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06" (1/1) ... [2024-09-13 10:14:06,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:14:06,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:06,821 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 10:14:06,823 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 10:14:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 10:14:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 10:14:06,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 10:14:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 10:14:06,922 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 10:14:06,923 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 10:14:07,051 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-09-13 10:14:07,051 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 10:14:07,084 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 10:14:07,085 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-13 10:14:07,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:14:07 BoogieIcfgContainer [2024-09-13 10:14:07,085 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 10:14:07,088 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 10:14:07,088 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 10:14:07,100 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 10:14:07,100 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 10:14:04" (1/4) ... [2024-09-13 10:14:07,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8961f3 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 10:14:07, skipping insertion in model container [2024-09-13 10:14:07,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 10:14:06" (2/4) ... [2024-09-13 10:14:07,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8961f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:14:07, skipping insertion in model container [2024-09-13 10:14:07,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:14:06" (3/4) ... [2024-09-13 10:14:07,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8961f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:14:07, skipping insertion in model container [2024-09-13 10:14:07,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:14:07" (4/4) ... [2024-09-13 10:14:07,117 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_3.c [2024-09-13 10:14:07,141 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 10:14:07,141 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-09-13 10:14:07,177 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 10:14:07,182 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;@16fcb02e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 10:14:07,182 INFO L337 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-09-13 10:14:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 16 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 10:14:07,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-09-13 10:14:07,189 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:07,190 INFO L216 NwaCegarLoop]: trace histogram [1, 1] [2024-09-13 10:14:07,190 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:07,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:07,195 INFO L85 PathProgramCache]: Analyzing trace with hash 2825, now seen corresponding path program 1 times [2024-09-13 10:14:07,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:07,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657831711] [2024-09-13 10:14:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:07,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:07,389 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 10:14:07,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:07,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657831711] [2024-09-13 10:14:07,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657831711] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:07,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:07,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-09-13 10:14:07,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226400180] [2024-09-13 10:14:07,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:07,396 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 10:14:07,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:07,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 10:14:07,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 10:14:07,423 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 16 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) 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 10:14:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:07,486 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2024-09-13 10:14:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 10:14:07,489 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 10:14:07,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:07,495 INFO L225 Difference]: With dead ends: 19 [2024-09-13 10:14:07,495 INFO L226 Difference]: Without dead ends: 17 [2024-09-13 10:14:07,497 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 10:14:07,501 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:07,502 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 15 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:07,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-13 10:14:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-13 10:14:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 16 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 10:14:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-09-13 10:14:07,524 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 2 [2024-09-13 10:14:07,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:07,525 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-09-13 10:14:07,525 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 10:14:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-09-13 10:14:07,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-09-13 10:14:07,525 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:07,526 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-09-13 10:14:07,526 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 10:14:07,526 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:07,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:07,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2716172, now seen corresponding path program 1 times [2024-09-13 10:14:07,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:07,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660323261] [2024-09-13 10:14:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:07,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:07,606 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 10:14:07,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:07,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660323261] [2024-09-13 10:14:07,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660323261] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:07,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:07,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 10:14:07,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125346146] [2024-09-13 10:14:07,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:07,608 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:14:07,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:07,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:14:07,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:14:07,609 INFO L87 Difference]: Start difference. First operand 17 states and 19 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 10:14:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:07,668 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2024-09-13 10:14:07,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 10:14:07,669 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 10:14:07,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:07,669 INFO L225 Difference]: With dead ends: 19 [2024-09-13 10:14:07,670 INFO L226 Difference]: Without dead ends: 19 [2024-09-13 10:14:07,670 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 10:14:07,671 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:07,671 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-09-13 10:14:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-09-13 10:14:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 18 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 10:14:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-09-13 10:14:07,678 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 4 [2024-09-13 10:14:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:07,679 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-09-13 10:14:07,679 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 10:14:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-09-13 10:14:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-09-13 10:14:07,680 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:07,680 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-09-13 10:14:07,680 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 10:14:07,681 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:07,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:07,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1684724337, now seen corresponding path program 1 times [2024-09-13 10:14:07,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:07,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259257020] [2024-09-13 10:14:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:07,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:07,836 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 10:14:07,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:07,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259257020] [2024-09-13 10:14:07,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259257020] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:07,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:07,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 10:14:07,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031733875] [2024-09-13 10:14:07,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:07,837 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:14:07,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:07,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:14:07,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:14:07,838 INFO L87 Difference]: Start difference. First operand 19 states and 21 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 10:14:07,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:07,902 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2024-09-13 10:14:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:14:07,903 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 10:14:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:07,904 INFO L225 Difference]: With dead ends: 30 [2024-09-13 10:14:07,904 INFO L226 Difference]: Without dead ends: 30 [2024-09-13 10:14:07,904 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 10:14:07,905 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:07,906 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 13 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:07,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-13 10:14:07,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2024-09-13 10:14:07,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 20 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 10:14:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-09-13 10:14:07,912 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2024-09-13 10:14:07,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:07,913 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-09-13 10:14:07,913 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 10:14:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-09-13 10:14:07,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-13 10:14:07,914 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:07,914 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:07,915 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 10:14:07,915 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:07,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:07,916 INFO L85 PathProgramCache]: Analyzing trace with hash 182585518, now seen corresponding path program 1 times [2024-09-13 10:14:07,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:07,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121842406] [2024-09-13 10:14:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:07,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:08,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:08,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121842406] [2024-09-13 10:14:08,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121842406] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:08,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850537815] [2024-09-13 10:14:08,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:08,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:08,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:08,117 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 10:14:08,118 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 10:14:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:08,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 10:14:08,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:08,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:08,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850537815] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:08,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:08,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2024-09-13 10:14:08,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558211656] [2024-09-13 10:14:08,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:08,352 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 10:14:08,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:08,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 10:14:08,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2024-09-13 10:14:08,355 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 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 10:14:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:08,526 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2024-09-13 10:14:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 10:14:08,526 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 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 8 [2024-09-13 10:14:08,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:08,528 INFO L225 Difference]: With dead ends: 54 [2024-09-13 10:14:08,528 INFO L226 Difference]: Without dead ends: 54 [2024-09-13 10:14:08,529 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 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 10:14:08,530 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:08,530 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 18 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-13 10:14:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2024-09-13 10:14:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 51 states have internal predecessors, (65), 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 10:14:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2024-09-13 10:14:08,541 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 8 [2024-09-13 10:14:08,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:08,542 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2024-09-13 10:14:08,542 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 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 10:14:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2024-09-13 10:14:08,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-13 10:14:08,542 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:08,544 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:08,560 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 10:14:08,744 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:08,752 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:08,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash -628973555, now seen corresponding path program 2 times [2024-09-13 10:14:08,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:08,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647486139] [2024-09-13 10:14:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:08,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:08,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:08,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647486139] [2024-09-13 10:14:08,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647486139] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:08,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954495271] [2024-09-13 10:14:08,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:14:08,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:08,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:08,916 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 10:14:08,917 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 10:14:08,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:14:08,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:08,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 10:14:08,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:09,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:09,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954495271] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:09,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:09,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2024-09-13 10:14:09,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689487909] [2024-09-13 10:14:09,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:09,161 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 10:14:09,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:09,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 10:14:09,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2024-09-13 10:14:09,162 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 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 10:14:09,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:09,344 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2024-09-13 10:14:09,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 10:14:09,345 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 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 10 [2024-09-13 10:14:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:09,345 INFO L225 Difference]: With dead ends: 62 [2024-09-13 10:14:09,346 INFO L226 Difference]: Without dead ends: 62 [2024-09-13 10:14:09,346 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 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 10:14:09,347 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:09,347 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 19 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:09,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-13 10:14:09,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2024-09-13 10:14:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 59 states have internal predecessors, (73), 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 10:14:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2024-09-13 10:14:09,354 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 10 [2024-09-13 10:14:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:09,354 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2024-09-13 10:14:09,354 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 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 10:14:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2024-09-13 10:14:09,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-13 10:14:09,355 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:09,355 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:09,369 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 10:14:09,559 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:09,560 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:09,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:09,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1146805164, now seen corresponding path program 3 times [2024-09-13 10:14:09,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:09,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014832057] [2024-09-13 10:14:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:09,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:09,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:09,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014832057] [2024-09-13 10:14:09,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014832057] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:09,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426671104] [2024-09-13 10:14:09,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 10:14:09,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:09,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:09,705 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 10:14:09,706 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 10:14:09,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 10:14:09,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:09,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-13 10:14:09,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:14:09,897 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:14:09,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426671104] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:09,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:14:09,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2024-09-13 10:14:09,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386258815] [2024-09-13 10:14:09,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:09,898 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:14:09,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:09,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:14:09,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2024-09-13 10:14:09,900 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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 10:14:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:09,951 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2024-09-13 10:14:09,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:14:09,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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 12 [2024-09-13 10:14:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:09,953 INFO L225 Difference]: With dead ends: 60 [2024-09-13 10:14:09,953 INFO L226 Difference]: Without dead ends: 60 [2024-09-13 10:14:09,953 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2024-09-13 10:14:09,954 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:09,954 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-13 10:14:09,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-13 10:14:09,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 59 states have internal predecessors, (71), 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 10:14:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2024-09-13 10:14:09,959 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 12 [2024-09-13 10:14:09,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:09,959 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2024-09-13 10:14:09,959 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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 10:14:09,959 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2024-09-13 10:14:09,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-13 10:14:09,960 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:09,960 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:09,978 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 10:14:10,160 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 10:14:10,161 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:10,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1992139143, now seen corresponding path program 1 times [2024-09-13 10:14:10,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:10,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272692533] [2024-09-13 10:14:10,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:10,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-13 10:14:10,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:10,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272692533] [2024-09-13 10:14:10,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272692533] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:10,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72059775] [2024-09-13 10:14:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:10,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:10,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:10,295 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 10:14:10,296 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 10:14:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:10,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-13 10:14:10,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:10,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:14:10,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72059775] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:10,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:10,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-09-13 10:14:10,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162974863] [2024-09-13 10:14:10,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:10,434 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-13 10:14:10,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:10,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-13 10:14:10,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-09-13 10:14:10,435 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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 10:14:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:10,661 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2024-09-13 10:14:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 10:14:10,661 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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 15 [2024-09-13 10:14:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:10,662 INFO L225 Difference]: With dead ends: 91 [2024-09-13 10:14:10,662 INFO L226 Difference]: Without dead ends: 91 [2024-09-13 10:14:10,663 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2024-09-13 10:14:10,663 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:10,663 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 22 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-09-13 10:14:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2024-09-13 10:14:10,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 88 states have internal predecessors, (108), 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 10:14:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2024-09-13 10:14:10,676 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 15 [2024-09-13 10:14:10,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:10,676 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2024-09-13 10:14:10,677 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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 10:14:10,677 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2024-09-13 10:14:10,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-13 10:14:10,677 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:10,678 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:10,696 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 10:14:10,881 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:10,882 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:10,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:10,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1039224164, now seen corresponding path program 1 times [2024-09-13 10:14:10,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:10,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000011855] [2024-09-13 10:14:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:10,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 9 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 10:14:11,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:11,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000011855] [2024-09-13 10:14:11,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000011855] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:11,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250375238] [2024-09-13 10:14:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:11,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:11,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:11,045 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 10:14:11,047 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 10:14:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:11,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 10:14:11,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-09-13 10:14:11,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-09-13 10:14:11,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250375238] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:11,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:11,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-09-13 10:14:11,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835880814] [2024-09-13 10:14:11,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:11,250 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 10:14:11,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:11,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 10:14:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-09-13 10:14:11,251 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 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 10:14:11,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:11,324 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2024-09-13 10:14:11,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 10:14:11,324 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 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 29 [2024-09-13 10:14:11,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:11,325 INFO L225 Difference]: With dead ends: 92 [2024-09-13 10:14:11,325 INFO L226 Difference]: Without dead ends: 92 [2024-09-13 10:14:11,325 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-09-13 10:14:11,326 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:11,326 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 14 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:11,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-13 10:14:11,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2024-09-13 10:14:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.2289156626506024) internal successors, (102), 86 states have internal predecessors, (102), 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 10:14:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2024-09-13 10:14:11,332 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 29 [2024-09-13 10:14:11,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:11,332 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2024-09-13 10:14:11,332 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 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 10:14:11,332 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2024-09-13 10:14:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-13 10:14:11,333 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:11,333 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:11,350 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 10:14:11,533 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-13 10:14:11,534 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:11,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:11,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2032961147, now seen corresponding path program 2 times [2024-09-13 10:14:11,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:11,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268163761] [2024-09-13 10:14:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:11,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 10:14:11,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:11,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268163761] [2024-09-13 10:14:11,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268163761] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:11,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518148734] [2024-09-13 10:14:11,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:14:11,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:11,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:11,712 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 10:14:11,713 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 10:14:11,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:14:11,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:11,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-13 10:14:11,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 64 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-09-13 10:14:11,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 64 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-09-13 10:14:11,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518148734] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:11,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:11,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2024-09-13 10:14:11,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527222824] [2024-09-13 10:14:11,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:11,903 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 10:14:11,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:11,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 10:14:11,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-09-13 10:14:11,904 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 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 10:14:12,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:12,018 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2024-09-13 10:14:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 10:14:12,019 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 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 31 [2024-09-13 10:14:12,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:12,019 INFO L225 Difference]: With dead ends: 87 [2024-09-13 10:14:12,019 INFO L226 Difference]: Without dead ends: 87 [2024-09-13 10:14:12,019 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 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 10:14:12,020 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:12,020 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 17 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-13 10:14:12,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-09-13 10:14:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 86 states have internal predecessors, (100), 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 10:14:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2024-09-13 10:14:12,025 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 31 [2024-09-13 10:14:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:12,025 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2024-09-13 10:14:12,025 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 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 10:14:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2024-09-13 10:14:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-13 10:14:12,026 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:12,026 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:12,040 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 10:14:12,230 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:12,231 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:12,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:12,231 INFO L85 PathProgramCache]: Analyzing trace with hash -534454630, now seen corresponding path program 3 times [2024-09-13 10:14:12,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:12,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471754470] [2024-09-13 10:14:12,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:12,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 10:14:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471754470] [2024-09-13 10:14:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471754470] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762547386] [2024-09-13 10:14:12,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 10:14:12,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:12,417 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 10:14:12,427 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 10:14:12,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 10:14:12,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:12,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-13 10:14:12,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-09-13 10:14:12,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:14:12,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762547386] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:12,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:14:12,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2024-09-13 10:14:12,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505540395] [2024-09-13 10:14:12,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:12,588 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:14:12,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:12,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:14:12,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2024-09-13 10:14:12,591 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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) [2024-09-13 10:14:12,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:12,640 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2024-09-13 10:14:12,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:14:12,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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) Word has length 33 [2024-09-13 10:14:12,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:12,642 INFO L225 Difference]: With dead ends: 86 [2024-09-13 10:14:12,642 INFO L226 Difference]: Without dead ends: 86 [2024-09-13 10:14:12,642 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2024-09-13 10:14:12,642 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:12,643 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-13 10:14:12,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-09-13 10:14:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 85 states have internal predecessors, (96), 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 10:14:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2024-09-13 10:14:12,650 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 33 [2024-09-13 10:14:12,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:12,651 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2024-09-13 10:14:12,651 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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) [2024-09-13 10:14:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2024-09-13 10:14:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-13 10:14:12,654 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:12,654 INFO L216 NwaCegarLoop]: trace histogram [14, 12, 2, 2, 2, 2, 1, 1, 1, 1] [2024-09-13 10:14:12,670 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 10:14:12,855 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:12,855 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:12,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:12,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1978806284, now seen corresponding path program 2 times [2024-09-13 10:14:12,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:12,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541272490] [2024-09-13 10:14:12,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:12,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-09-13 10:14:13,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:13,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541272490] [2024-09-13 10:14:13,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541272490] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:13,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:13,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 10:14:13,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025025615] [2024-09-13 10:14:13,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:13,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 10:14:13,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:13,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 10:14:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-09-13 10:14:13,048 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2024-09-13 10:14:13,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:13,078 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2024-09-13 10:14:13,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:14:13,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) Word has length 38 [2024-09-13 10:14:13,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:13,079 INFO L225 Difference]: With dead ends: 86 [2024-09-13 10:14:13,079 INFO L226 Difference]: Without dead ends: 86 [2024-09-13 10:14:13,079 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-09-13 10:14:13,080 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:13,080 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 10 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:13,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-13 10:14:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-09-13 10:14:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 83 states have (on average 1.144578313253012) internal successors, (95), 85 states have internal predecessors, (95), 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 10:14:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2024-09-13 10:14:13,083 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 38 [2024-09-13 10:14:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:13,084 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2024-09-13 10:14:13,084 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2024-09-13 10:14:13,084 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2024-09-13 10:14:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 10:14:13,084 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:13,084 INFO L216 NwaCegarLoop]: trace histogram [14, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:14:13,085 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-13 10:14:13,085 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:13,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:13,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2103047935, now seen corresponding path program 1 times [2024-09-13 10:14:13,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:13,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202334551] [2024-09-13 10:14:13,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:13,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-13 10:14:13,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:13,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202334551] [2024-09-13 10:14:13,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202334551] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:13,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943806689] [2024-09-13 10:14:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:13,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:13,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:13,184 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 10:14:13,185 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 10:14:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:13,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-13 10:14:13,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 1 proven. 105 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 10:14:13,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 1 proven. 105 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 10:14:13,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943806689] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:14:13,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:14:13,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2024-09-13 10:14:13,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730431908] [2024-09-13 10:14:13,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:14:13,359 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 10:14:13,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:13,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 10:14:13,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-09-13 10:14:13,360 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 10:14:13,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:13,522 INFO L93 Difference]: Finished difference Result 222 states and 242 transitions. [2024-09-13 10:14:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 10:14:13,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 41 [2024-09-13 10:14:13,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:13,523 INFO L225 Difference]: With dead ends: 222 [2024-09-13 10:14:13,524 INFO L226 Difference]: Without dead ends: 222 [2024-09-13 10:14:13,524 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2024-09-13 10:14:13,525 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:13,525 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:14:13,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-13 10:14:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2024-09-13 10:14:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 219 states have (on average 1.1050228310502284) internal successors, (242), 221 states have internal predecessors, (242), 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 10:14:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 242 transitions. [2024-09-13 10:14:13,531 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 242 transitions. Word has length 41 [2024-09-13 10:14:13,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:13,531 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 242 transitions. [2024-09-13 10:14:13,531 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 10:14:13,532 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 242 transitions. [2024-09-13 10:14:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-09-13 10:14:13,533 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:13,533 INFO L216 NwaCegarLoop]: trace histogram [42, 36, 7, 6, 6, 6, 2, 2, 1, 1, 1, 1] [2024-09-13 10:14:13,552 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 10:14:13,734 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 10:14:13,735 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:13,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:13,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1734497796, now seen corresponding path program 1 times [2024-09-13 10:14:13,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:13,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411744586] [2024-09-13 10:14:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:13,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2024-09-13 10:14:13,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:13,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411744586] [2024-09-13 10:14:13,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411744586] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:13,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:13,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 10:14:13,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294913756] [2024-09-13 10:14:13,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:13,907 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:14:13,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:13,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:14:13,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:14:13,908 INFO L87 Difference]: Start difference. First operand 222 states and 242 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 10:14:13,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:13,930 INFO L93 Difference]: Finished difference Result 222 states and 241 transitions. [2024-09-13 10:14:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 10:14:13,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 111 [2024-09-13 10:14:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:13,931 INFO L225 Difference]: With dead ends: 222 [2024-09-13 10:14:13,932 INFO L226 Difference]: Without dead ends: 222 [2024-09-13 10:14:13,932 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 10:14:13,932 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:13,933 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:13,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-13 10:14:13,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2024-09-13 10:14:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 219 states have (on average 1.1004566210045663) internal successors, (241), 221 states have internal predecessors, (241), 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 10:14:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 241 transitions. [2024-09-13 10:14:13,938 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 241 transitions. Word has length 111 [2024-09-13 10:14:13,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:13,938 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 241 transitions. [2024-09-13 10:14:13,938 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 10:14:13,938 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 241 transitions. [2024-09-13 10:14:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-13 10:14:13,941 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:13,941 INFO L216 NwaCegarLoop]: trace histogram [49, 42, 8, 7, 7, 7, 2, 2, 1, 1, 1, 1] [2024-09-13 10:14:13,941 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-13 10:14:13,941 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:13,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:13,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1988639740, now seen corresponding path program 2 times [2024-09-13 10:14:13,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:13,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204797725] [2024-09-13 10:14:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:13,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 621 proven. 1 refuted. 0 times theorem prover too weak. 1817 trivial. 0 not checked. [2024-09-13 10:14:14,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:14,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204797725] [2024-09-13 10:14:14,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204797725] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:14,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789563009] [2024-09-13 10:14:14,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:14:14,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:14:14,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:14:14,358 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 10:14:14,362 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 10:14:14,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:14:14,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:14:14,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 10:14:14,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:14:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 621 proven. 1 refuted. 0 times theorem prover too weak. 1817 trivial. 0 not checked. [2024-09-13 10:14:14,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:14:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 2377 trivial. 0 not checked. [2024-09-13 10:14:14,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789563009] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 10:14:14,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-13 10:14:14,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 6] total 12 [2024-09-13 10:14:14,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577418741] [2024-09-13 10:14:14,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:14,649 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:14:14,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:14,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:14:14,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-09-13 10:14:14,650 INFO L87 Difference]: Start difference. First operand 222 states and 241 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 10:14:14,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:14,679 INFO L93 Difference]: Finished difference Result 221 states and 235 transitions. [2024-09-13 10:14:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:14:14,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 128 [2024-09-13 10:14:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:14,681 INFO L225 Difference]: With dead ends: 221 [2024-09-13 10:14:14,681 INFO L226 Difference]: Without dead ends: 221 [2024-09-13 10:14:14,681 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-09-13 10:14:14,682 INFO L434 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:14,682 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 6 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:14,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-09-13 10:14:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2024-09-13 10:14:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 219 states have (on average 1.0730593607305936) internal successors, (235), 220 states have internal predecessors, (235), 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 10:14:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 235 transitions. [2024-09-13 10:14:14,686 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 235 transitions. Word has length 128 [2024-09-13 10:14:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:14,686 INFO L474 AbstractCegarLoop]: Abstraction has 221 states and 235 transitions. [2024-09-13 10:14:14,686 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 10:14:14,686 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 235 transitions. [2024-09-13 10:14:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-09-13 10:14:14,689 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:14,689 INFO L216 NwaCegarLoop]: trace histogram [84, 72, 14, 12, 12, 12, 2, 2, 2, 2, 1, 1] [2024-09-13 10:14:14,705 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 10:14:14,894 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 10:14:14,895 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:14,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:14,895 INFO L85 PathProgramCache]: Analyzing trace with hash -899465207, now seen corresponding path program 2 times [2024-09-13 10:14:14,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:14,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144306429] [2024-09-13 10:14:14,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:14,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3671 proven. 0 refuted. 0 times theorem prover too weak. 3554 trivial. 0 not checked. [2024-09-13 10:14:15,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:15,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144306429] [2024-09-13 10:14:15,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144306429] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:15,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:15,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 10:14:15,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915760369] [2024-09-13 10:14:15,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:15,205 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:14:15,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:15,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:14:15,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:14:15,206 INFO L87 Difference]: Start difference. First operand 221 states and 235 transitions. Second operand has 6 states, 5 states have (on average 4.4) 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 10:14:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:15,233 INFO L93 Difference]: Finished difference Result 220 states and 234 transitions. [2024-09-13 10:14:15,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:14:15,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) 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 216 [2024-09-13 10:14:15,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:15,234 INFO L225 Difference]: With dead ends: 220 [2024-09-13 10:14:15,235 INFO L226 Difference]: Without dead ends: 220 [2024-09-13 10:14:15,235 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 10:14:15,235 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:15,236 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:15,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-09-13 10:14:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2024-09-13 10:14:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0684931506849316) internal successors, (234), 219 states have internal predecessors, (234), 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 10:14:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 234 transitions. [2024-09-13 10:14:15,239 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 234 transitions. Word has length 216 [2024-09-13 10:14:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:15,240 INFO L474 AbstractCegarLoop]: Abstraction has 220 states and 234 transitions. [2024-09-13 10:14:15,240 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) 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 10:14:15,240 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 234 transitions. [2024-09-13 10:14:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2024-09-13 10:14:15,242 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:14:15,242 INFO L216 NwaCegarLoop]: trace histogram [84, 72, 14, 12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1] [2024-09-13 10:14:15,242 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-09-13 10:14:15,242 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 1 more)] === [2024-09-13 10:14:15,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:14:15,242 INFO L85 PathProgramCache]: Analyzing trace with hash 333018945, now seen corresponding path program 1 times [2024-09-13 10:14:15,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:14:15,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061892942] [2024-09-13 10:14:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:14:15,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:14:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:14:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7209 trivial. 0 not checked. [2024-09-13 10:14:15,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:14:15,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061892942] [2024-09-13 10:14:15,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061892942] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:14:15,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:14:15,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-13 10:14:15,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421671322] [2024-09-13 10:14:15,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:14:15,554 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:14:15,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:14:15,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:14:15,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:14:15,555 INFO L87 Difference]: Start difference. First operand 220 states and 234 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 10:14:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:14:15,582 INFO L93 Difference]: Finished difference Result 218 states and 232 transitions. [2024-09-13 10:14:15,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:14:15,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 219 [2024-09-13 10:14:15,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:14:15,583 INFO L225 Difference]: With dead ends: 218 [2024-09-13 10:14:15,583 INFO L226 Difference]: Without dead ends: 0 [2024-09-13 10:14:15,583 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 10:14:15,584 INFO L434 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:14:15,584 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:14:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-13 10:14:15,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-13 10:14:15,586 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 10:14:15,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-13 10:14:15,586 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 219 [2024-09-13 10:14:15,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:14:15,586 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-13 10:14:15,586 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 10:14:15,587 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-13 10:14:15,587 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-13 10:14:15,589 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-09-13 10:14:15,590 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-09-13 10:14:15,590 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 4 remaining) [2024-09-13 10:14:15,590 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-09-13 10:14:15,590 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-09-13 10:14:15,593 INFO L408 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 2, 1, 1, 1, 1] [2024-09-13 10:14:15,594 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 10:14:15,596 INFO L469 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-09-13 10:14:15,597 INFO L470 ceAbstractionStarter]: WitnessConsidered=3 [2024-09-13 10:14:15,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 10:14:15 BoogieIcfgContainer [2024-09-13 10:14:15,598 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 10:14:15,598 INFO L158 Benchmark]: Toolchain (without parser) took 9161.36ms. Allocated memory was 159.4MB in the beginning and 232.8MB in the end (delta: 73.4MB). Free memory was 120.3MB in the beginning and 108.0MB in the end (delta: 12.3MB). Peak memory consumption was 86.6MB. Max. memory is 16.1GB. [2024-09-13 10:14:15,598 INFO L158 Benchmark]: Witness Parser took 0.20ms. Allocated memory is still 107.0MB. Free memory is still 78.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:14:15,599 INFO L158 Benchmark]: CDTParser took 0.85ms. Allocated memory is still 107.0MB. Free memory is still 76.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:14:15,599 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.63ms. Allocated memory is still 159.4MB. Free memory was 120.1MB in the beginning and 106.1MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-13 10:14:15,599 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.32ms. Allocated memory is still 159.4MB. Free memory was 106.1MB in the beginning and 104.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 10:14:15,600 INFO L158 Benchmark]: Boogie Preprocessor took 34.36ms. Allocated memory is still 159.4MB. Free memory was 104.4MB in the beginning and 102.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 10:14:15,600 INFO L158 Benchmark]: RCFGBuilder took 289.42ms. Allocated memory is still 159.4MB. Free memory was 102.9MB in the beginning and 128.3MB in the end (delta: -25.5MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. [2024-09-13 10:14:15,600 INFO L158 Benchmark]: TraceAbstraction took 8509.63ms. Allocated memory was 159.4MB in the beginning and 232.8MB in the end (delta: 73.4MB). Free memory was 127.7MB in the beginning and 108.0MB in the end (delta: 19.7MB). Peak memory consumption was 92.5MB. Max. memory is 16.1GB. [2024-09-13 10:14:15,601 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 0.20ms. Allocated memory is still 107.0MB. Free memory is still 78.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.85ms. Allocated memory is still 107.0MB. Free memory is still 76.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 286.63ms. Allocated memory is still 159.4MB. Free memory was 120.1MB in the beginning and 106.1MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.32ms. Allocated memory is still 159.4MB. Free memory was 106.1MB in the beginning and 104.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.36ms. Allocated memory is still 159.4MB. Free memory was 104.4MB in the beginning and 102.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 289.42ms. Allocated memory is still 159.4MB. Free memory was 102.9MB in the beginning and 128.3MB in the end (delta: -25.5MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. * TraceAbstraction took 8509.63ms. Allocated memory was 159.4MB in the beginning and 232.8MB in the end (delta: 73.4MB). Free memory was 127.7MB in the beginning and 108.0MB in the end (delta: 19.7MB). Peak memory consumption was 92.5MB. 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: 21]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - 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: 29]: 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, 17 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 8.4s, OverallIterations: 16, TraceHistogramMax: 84, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 211 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 211 mSDsluCounter, 215 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 108 mSDsCounter, 92 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1159 IncrementalHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 92 mSolverCounterUnsat, 107 mSDtfsCounter, 1159 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 656 GetRequests, 498 SyntacticMatches, 4 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=222occurred in iteration=12, InterpolantAutomatonStates: 160, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 1210 NumberOfCodeBlocks, 1192 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1440 ConstructedInterpolants, 0 QuantifiedInterpolants, 3874 SizeOfPredicates, 4 NumberOfNonLiveVariables, 903 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 32 InterpolantComputations, 10 PerfectInterpolantSequences, 24991/25353 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 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-13 10:14:15,633 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE