./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 20f9ce6814caacb533e5bf2143ac3e067387f11238548a0b9b41e2de8e2cc436 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 10:52:07,529 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 10:52:07,591 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 10:52:07,595 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 10:52:07,596 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 10:52:07,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 10:52:07,628 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 10:52:07,628 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 10:52:07,629 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 10:52:07,629 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 10:52:07,630 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 10:52:07,632 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 10:52:07,633 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 10:52:07,633 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 10:52:07,633 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 10:52:07,634 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 10:52:07,638 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 10:52:07,638 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 10:52:07,638 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 10:52:07,639 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 10:52:07,639 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 10:52:07,639 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 10:52:07,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 10:52:07,640 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 10:52:07,640 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 10:52:07,640 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 10:52:07,641 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 10:52:07,641 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 10:52:07,641 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 10:52:07,641 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 10:52:07,642 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 10:52:07,642 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 10:52:07,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:52:07,653 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 10:52:07,653 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 10:52:07,653 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 10:52:07,654 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 10:52:07,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 10:52:07,654 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 10:52:07,654 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 10:52:07,654 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 10:52:07,655 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 10:52:07,655 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.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20f9ce6814caacb533e5bf2143ac3e067387f11238548a0b9b41e2de8e2cc436 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 10:52:07,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 10:52:08,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 10:52:08,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 10:52:08,011 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 10:52:08,011 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 10:52:08,012 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c [2024-09-25 10:52:09,416 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 10:52:09,651 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 10:52:09,653 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c [2024-09-25 10:52:09,664 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/96e58024f/59ee86c1da24457aa4394ae5b00e800b/FLAGb581e0ac7 [2024-09-25 10:52:10,031 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/96e58024f/59ee86c1da24457aa4394ae5b00e800b [2024-09-25 10:52:10,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 10:52:10,034 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 10:52:10,035 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 10:52:10,035 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 10:52:10,043 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 10:52:10,044 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:52:10" (1/1) ... [2024-09-25 10:52:10,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fcf99da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10, skipping insertion in model container [2024-09-25 10:52:10,045 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:52:10" (1/1) ... [2024-09-25 10:52:10,062 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 10:52:10,210 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c[489,502] [2024-09-25 10:52:10,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:52:10,248 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 10:52:10,260 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c[489,502] [2024-09-25 10:52:10,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:52:10,288 INFO L204 MainTranslator]: Completed translation [2024-09-25 10:52:10,288 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10 WrapperNode [2024-09-25 10:52:10,289 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 10:52:10,290 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 10:52:10,290 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 10:52:10,290 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 10:52:10,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10" (1/1) ... [2024-09-25 10:52:10,308 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10" (1/1) ... [2024-09-25 10:52:10,314 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 10:52:10,315 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 10:52:10,315 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 10:52:10,316 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 10:52:10,317 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 10:52:10,326 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10" (1/1) ... [2024-09-25 10:52:10,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10" (1/1) ... [2024-09-25 10:52:10,328 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10" (1/1) ... [2024-09-25 10:52:10,338 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]. [2024-09-25 10:52:10,338 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10" (1/1) ... [2024-09-25 10:52:10,338 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10" (1/1) ... [2024-09-25 10:52:10,341 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10" (1/1) ... [2024-09-25 10:52:10,345 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10" (1/1) ... [2024-09-25 10:52:10,346 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10" (1/1) ... [2024-09-25 10:52:10,347 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10" (1/1) ... [2024-09-25 10:52:10,351 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 10:52:10,352 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 10:52:10,359 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 10:52:10,359 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 10:52:10,360 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10" (1/1) ... [2024-09-25 10:52:10,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:52:10,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:10,394 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) [2024-09-25 10:52:10,399 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 [2024-09-25 10:52:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 10:52:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 10:52:10,441 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 10:52:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 10:52:10,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 10:52:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 10:52:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 10:52:10,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 10:52:10,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 10:52:10,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 10:52:10,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 10:52:10,444 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 10:52:10,513 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 10:52:10,515 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 10:52:10,702 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-25 10:52:10,705 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 10:52:10,733 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 10:52:10,733 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-25 10:52:10,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:52:10 BoogieIcfgContainer [2024-09-25 10:52:10,735 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 10:52:10,738 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 10:52:10,738 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 10:52:10,741 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 10:52:10,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:52:10" (1/3) ... [2024-09-25 10:52:10,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd5a18d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:52:10, skipping insertion in model container [2024-09-25 10:52:10,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:10" (2/3) ... [2024-09-25 10:52:10,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd5a18d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:52:10, skipping insertion in model container [2024-09-25 10:52:10,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:52:10" (3/3) ... [2024-09-25 10:52:10,745 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound20.c [2024-09-25 10:52:10,763 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 10:52:10,763 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 10:52:10,825 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 10:52:10,831 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=All, 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;@56dd9485, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 10:52:10,833 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 10:52:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:52:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-25 10:52:10,847 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:10,847 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:10,848 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:10,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:10,854 INFO L85 PathProgramCache]: Analyzing trace with hash 963610160, now seen corresponding path program 1 times [2024-09-25 10:52:10,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:10,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969314961] [2024-09-25 10:52:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:10,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:10,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:52:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:11,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:52:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:11,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:52:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:11,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:52:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:11,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:52:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:52:11,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:11,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969314961] [2024-09-25 10:52:11,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969314961] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:52:11,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:52:11,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 10:52:11,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125636970] [2024-09-25 10:52:11,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:52:11,044 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 10:52:11,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:11,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 10:52:11,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 10:52:11,069 INFO L87 Difference]: Start difference. First operand has 35 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 10:52:11,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:11,109 INFO L93 Difference]: Finished difference Result 64 states and 102 transitions. [2024-09-25 10:52:11,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 10:52:11,112 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-25 10:52:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:11,118 INFO L225 Difference]: With dead ends: 64 [2024-09-25 10:52:11,119 INFO L226 Difference]: Without dead ends: 31 [2024-09-25 10:52:11,122 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 10:52:11,126 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:11,127 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:52:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-25 10:52:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-25 10:52:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:52:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-09-25 10:52:11,167 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 32 [2024-09-25 10:52:11,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:11,168 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-09-25 10:52:11,168 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 10:52:11,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-09-25 10:52:11,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-25 10:52:11,174 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:11,174 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:11,174 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 10:52:11,175 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:11,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:11,176 INFO L85 PathProgramCache]: Analyzing trace with hash -914175556, now seen corresponding path program 1 times [2024-09-25 10:52:11,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:11,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366682493] [2024-09-25 10:52:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:11,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:52:11,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774432463] [2024-09-25 10:52:11,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:11,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:11,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:11,229 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) [2024-09-25 10:52:11,231 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 10:52:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:11,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-25 10:52:11,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:52:11,425 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:52:11,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:11,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366682493] [2024-09-25 10:52:11,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:52:11,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774432463] [2024-09-25 10:52:11,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774432463] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:52:11,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:52:11,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:52:11,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406479161] [2024-09-25 10:52:11,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:52:11,429 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:52:11,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:11,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:52:11,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:52:11,431 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-25 10:52:11,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:11,516 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2024-09-25 10:52:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:52:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2024-09-25 10:52:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:11,519 INFO L225 Difference]: With dead ends: 47 [2024-09-25 10:52:11,519 INFO L226 Difference]: Without dead ends: 45 [2024-09-25 10:52:11,520 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:52:11,522 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:11,523 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 129 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:52:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-25 10:52:11,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2024-09-25 10:52:11,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-25 10:52:11,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2024-09-25 10:52:11,541 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 32 [2024-09-25 10:52:11,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:11,542 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2024-09-25 10:52:11,542 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-25 10:52:11,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:11,545 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2024-09-25 10:52:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-25 10:52:11,546 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:11,546 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:11,565 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-25 10:52:11,748 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:11,749 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:11,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:11,750 INFO L85 PathProgramCache]: Analyzing trace with hash 737940505, now seen corresponding path program 1 times [2024-09-25 10:52:11,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:11,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965408788] [2024-09-25 10:52:11,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:11,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:52:11,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984145857] [2024-09-25 10:52:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:11,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:11,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:11,797 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) [2024-09-25 10:52:11,798 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 10:52:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:11,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-25 10:52:11,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:52:11,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:52:11,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:11,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965408788] [2024-09-25 10:52:11,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:52:11,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984145857] [2024-09-25 10:52:11,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984145857] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:52:11,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:52:11,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:52:11,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957845257] [2024-09-25 10:52:11,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:52:11,917 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:52:11,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:11,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:52:11,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:52:11,919 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-25 10:52:12,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:12,001 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2024-09-25 10:52:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:52:12,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-25 10:52:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:12,005 INFO L225 Difference]: With dead ends: 51 [2024-09-25 10:52:12,005 INFO L226 Difference]: Without dead ends: 49 [2024-09-25 10:52:12,005 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:52:12,006 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:12,006 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 131 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:52:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-25 10:52:12,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-09-25 10:52:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-25 10:52:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2024-09-25 10:52:12,019 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 37 [2024-09-25 10:52:12,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:12,019 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2024-09-25 10:52:12,020 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-25 10:52:12,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:12,020 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2024-09-25 10:52:12,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-25 10:52:12,021 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:12,022 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:12,037 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-25 10:52:12,225 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:12,226 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:12,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:12,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1385223068, now seen corresponding path program 1 times [2024-09-25 10:52:12,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:12,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573255184] [2024-09-25 10:52:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:12,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:52:12,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148817771] [2024-09-25 10:52:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:12,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:12,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:12,268 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) [2024-09-25 10:52:12,270 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 10:52:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:12,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-25 10:52:12,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 10:52:12,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:52:12,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:12,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573255184] [2024-09-25 10:52:12,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:52:12,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148817771] [2024-09-25 10:52:12,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148817771] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:52:12,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:52:12,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:52:12,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621893316] [2024-09-25 10:52:12,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:52:12,419 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:52:12,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:12,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:52:12,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:52:12,420 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-25 10:52:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:12,489 INFO L93 Difference]: Finished difference Result 73 states and 104 transitions. [2024-09-25 10:52:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:52:12,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-09-25 10:52:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:12,493 INFO L225 Difference]: With dead ends: 73 [2024-09-25 10:52:12,493 INFO L226 Difference]: Without dead ends: 69 [2024-09-25 10:52:12,493 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:52:12,494 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:12,495 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:52:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-25 10:52:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-25 10:52:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:52:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2024-09-25 10:52:12,519 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 42 [2024-09-25 10:52:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:12,519 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2024-09-25 10:52:12,520 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-25 10:52:12,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:12,520 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2024-09-25 10:52:12,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-25 10:52:12,525 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:12,526 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:12,542 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 10:52:12,726 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:12,727 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:12,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:12,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1071635405, now seen corresponding path program 1 times [2024-09-25 10:52:12,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:12,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30369174] [2024-09-25 10:52:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:12,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:12,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:52:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:12,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:52:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:12,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:52:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:12,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:52:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:12,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:52:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:12,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:52:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:12,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:52:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:12,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:52:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:52:12,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:12,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30369174] [2024-09-25 10:52:12,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30369174] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:52:12,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:52:12,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:52:12,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66230545] [2024-09-25 10:52:12,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:52:12,951 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:52:12,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:12,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:52:12,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:52:12,952 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-09-25 10:52:13,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:13,005 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2024-09-25 10:52:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:52:13,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 48 [2024-09-25 10:52:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:13,009 INFO L225 Difference]: With dead ends: 75 [2024-09-25 10:52:13,009 INFO L226 Difference]: Without dead ends: 73 [2024-09-25 10:52:13,010 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:52:13,011 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:13,011 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 140 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:52:13,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-25 10:52:13,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-25 10:52:13,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 39 states have internal predecessors, (44), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:52:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2024-09-25 10:52:13,043 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 48 [2024-09-25 10:52:13,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:13,046 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2024-09-25 10:52:13,046 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-09-25 10:52:13,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2024-09-25 10:52:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-25 10:52:13,048 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:13,048 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:13,048 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-25 10:52:13,048 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:13,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:13,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1501538128, now seen corresponding path program 1 times [2024-09-25 10:52:13,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:13,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856628256] [2024-09-25 10:52:13,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:13,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:52:13,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428325269] [2024-09-25 10:52:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:13,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:13,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:13,090 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) [2024-09-25 10:52:13,091 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 10:52:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:13,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-25 10:52:13,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-25 10:52:13,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:52:13,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:13,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856628256] [2024-09-25 10:52:13,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:52:13,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428325269] [2024-09-25 10:52:13,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428325269] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:52:13,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:52:13,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:52:13,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025889460] [2024-09-25 10:52:13,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:52:13,242 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:52:13,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:13,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:52:13,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:52:13,243 INFO L87 Difference]: Start difference. First operand 73 states and 100 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-25 10:52:13,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:13,312 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2024-09-25 10:52:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:52:13,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2024-09-25 10:52:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:13,314 INFO L225 Difference]: With dead ends: 83 [2024-09-25 10:52:13,314 INFO L226 Difference]: Without dead ends: 80 [2024-09-25 10:52:13,314 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:52:13,315 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:13,316 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 132 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:52:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-25 10:52:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2024-09-25 10:52:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 44 states have internal predecessors, (50), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:52:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-25 10:52:13,332 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 50 [2024-09-25 10:52:13,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:13,332 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-25 10:52:13,333 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-25 10:52:13,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:13,333 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-25 10:52:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-25 10:52:13,334 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:13,334 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:13,350 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 10:52:13,535 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:13,535 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:13,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash 789508930, now seen corresponding path program 1 times [2024-09-25 10:52:13,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:13,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607725394] [2024-09-25 10:52:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:13,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:13,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:52:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:13,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:52:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:13,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:52:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:13,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:52:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:13,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:52:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:13,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:52:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:13,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:52:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:13,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:52:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:13,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:52:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-25 10:52:13,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:13,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607725394] [2024-09-25 10:52:13,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607725394] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:52:13,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652570232] [2024-09-25 10:52:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:13,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:13,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:13,904 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) [2024-09-25 10:52:13,905 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 10:52:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:13,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-25 10:52:13,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-25 10:52:14,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:52:14,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652570232] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:52:14,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:52:14,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-25 10:52:14,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407783225] [2024-09-25 10:52:14,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:52:14,066 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 10:52:14,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:14,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 10:52:14,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-25 10:52:14,068 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-25 10:52:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:14,168 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2024-09-25 10:52:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 10:52:14,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2024-09-25 10:52:14,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:14,171 INFO L225 Difference]: With dead ends: 91 [2024-09-25 10:52:14,172 INFO L226 Difference]: Without dead ends: 87 [2024-09-25 10:52:14,172 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:52:14,173 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:14,174 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 157 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:52:14,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-25 10:52:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-09-25 10:52:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 states have internal predecessors, (55), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:52:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2024-09-25 10:52:14,190 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 53 [2024-09-25 10:52:14,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:14,191 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2024-09-25 10:52:14,192 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-25 10:52:14,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:14,192 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2024-09-25 10:52:14,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-25 10:52:14,193 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:14,193 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:14,210 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 10:52:14,393 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-25 10:52:14,394 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:14,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:14,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1427018501, now seen corresponding path program 2 times [2024-09-25 10:52:14,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:14,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297727539] [2024-09-25 10:52:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:14,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:52:14,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661894966] [2024-09-25 10:52:14,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:52:14,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:14,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:14,423 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) [2024-09-25 10:52:14,424 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 10:52:14,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:52:14,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:52:14,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-25 10:52:14,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-25 10:52:14,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:52:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-25 10:52:15,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:15,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297727539] [2024-09-25 10:52:15,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:52:15,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661894966] [2024-09-25 10:52:15,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661894966] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:52:15,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:52:15,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2024-09-25 10:52:15,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872459508] [2024-09-25 10:52:15,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:52:15,375 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 10:52:15,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:15,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 10:52:15,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:52:15,376 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-25 10:52:16,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:16,708 INFO L93 Difference]: Finished difference Result 128 states and 166 transitions. [2024-09-25 10:52:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 10:52:16,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 55 [2024-09-25 10:52:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:16,711 INFO L225 Difference]: With dead ends: 128 [2024-09-25 10:52:16,711 INFO L226 Difference]: Without dead ends: 126 [2024-09-25 10:52:16,712 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2024-09-25 10:52:16,712 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:16,713 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 252 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-25 10:52:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-09-25 10:52:16,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2024-09-25 10:52:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 53 states have (on average 1.150943396226415) internal successors, (61), 56 states have internal predecessors, (61), 27 states have call successors, (27), 14 states have call predecessors, (27), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:52:16,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2024-09-25 10:52:16,774 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 55 [2024-09-25 10:52:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:16,776 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2024-09-25 10:52:16,776 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-25 10:52:16,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:16,777 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2024-09-25 10:52:16,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-25 10:52:16,778 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:16,778 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:16,795 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 10:52:16,978 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:16,979 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:16,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:16,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1563984878, now seen corresponding path program 1 times [2024-09-25 10:52:16,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:16,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117471344] [2024-09-25 10:52:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:16,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:52:16,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976341687] [2024-09-25 10:52:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:16,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:16,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:17,000 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) [2024-09-25 10:52:17,003 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 10:52:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:17,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-25 10:52:17,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:52:17,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:52:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-25 10:52:17,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:17,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117471344] [2024-09-25 10:52:17,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:52:17,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976341687] [2024-09-25 10:52:17,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976341687] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:52:17,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:52:17,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2024-09-25 10:52:17,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069386739] [2024-09-25 10:52:17,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:52:17,577 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 10:52:17,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:17,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 10:52:17,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:52:17,578 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2024-09-25 10:52:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:18,372 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2024-09-25 10:52:18,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 10:52:18,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 60 [2024-09-25 10:52:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:18,374 INFO L225 Difference]: With dead ends: 119 [2024-09-25 10:52:18,374 INFO L226 Difference]: Without dead ends: 101 [2024-09-25 10:52:18,375 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:52:18,376 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:18,376 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 255 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-25 10:52:18,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-25 10:52:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2024-09-25 10:52:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:52:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2024-09-25 10:52:18,405 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 60 [2024-09-25 10:52:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:18,405 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2024-09-25 10:52:18,405 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2024-09-25 10:52:18,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:18,406 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2024-09-25 10:52:18,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-25 10:52:18,407 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:18,407 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:18,425 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-25 10:52:18,611 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:18,612 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:18,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:18,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1657370914, now seen corresponding path program 1 times [2024-09-25 10:52:18,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:18,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38338575] [2024-09-25 10:52:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:18,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:52:18,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678232642] [2024-09-25 10:52:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:18,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:18,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:18,638 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) [2024-09-25 10:52:18,639 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 10:52:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:18,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-25 10:52:18,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:52:18,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:52:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-25 10:52:18,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:18,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38338575] [2024-09-25 10:52:18,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:52:18,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678232642] [2024-09-25 10:52:18,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678232642] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 10:52:18,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:52:18,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2024-09-25 10:52:18,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420561487] [2024-09-25 10:52:18,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:52:18,941 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:52:18,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:18,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:52:18,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:52:18,942 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-25 10:52:19,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:19,056 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2024-09-25 10:52:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:52:19,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2024-09-25 10:52:19,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:19,058 INFO L225 Difference]: With dead ends: 92 [2024-09-25 10:52:19,058 INFO L226 Difference]: Without dead ends: 87 [2024-09-25 10:52:19,058 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-09-25 10:52:19,059 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:19,060 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:52:19,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-25 10:52:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2024-09-25 10:52:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 20 states have call successors, (20), 14 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:52:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2024-09-25 10:52:19,085 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 68 [2024-09-25 10:52:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:19,085 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2024-09-25 10:52:19,086 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-25 10:52:19,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:19,086 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2024-09-25 10:52:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-25 10:52:19,087 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:19,087 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:19,103 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-25 10:52:19,291 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:19,292 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:19,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:19,292 INFO L85 PathProgramCache]: Analyzing trace with hash -335668690, now seen corresponding path program 1 times [2024-09-25 10:52:19,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:19,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500684387] [2024-09-25 10:52:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:19,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:19,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:52:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:19,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:52:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:19,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:52:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:19,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:52:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:19,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:52:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:19,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:52:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:19,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:52:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:19,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:52:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:19,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:52:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:19,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:52:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:19,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:52:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:19,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:52:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-25 10:52:19,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:19,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500684387] [2024-09-25 10:52:19,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500684387] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:52:19,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880561140] [2024-09-25 10:52:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:19,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:19,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:19,537 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) [2024-09-25 10:52:19,538 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 10:52:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:19,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-25 10:52:19,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-25 10:52:19,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:52:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-25 10:52:19,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880561140] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:52:19,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:52:19,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2024-09-25 10:52:19,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677622268] [2024-09-25 10:52:19,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:52:19,725 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 10:52:19,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:19,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 10:52:19,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-09-25 10:52:19,726 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-25 10:52:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:19,915 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2024-09-25 10:52:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 10:52:19,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 71 [2024-09-25 10:52:19,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:19,916 INFO L225 Difference]: With dead ends: 92 [2024-09-25 10:52:19,916 INFO L226 Difference]: Without dead ends: 0 [2024-09-25 10:52:19,916 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:52:19,917 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:19,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 195 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:52:19,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-25 10:52:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-25 10:52:19,918 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) [2024-09-25 10:52:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-25 10:52:19,918 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2024-09-25 10:52:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:19,918 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-25 10:52:19,918 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-25 10:52:19,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-25 10:52:19,919 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-25 10:52:19,921 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-25 10:52:19,935 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-25 10:52:20,122 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-25 10:52:20,125 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:20,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-25 10:52:28,909 WARN L293 SmtUtils]: Spent 8.47s on a formula simplification. DAG size of input: 71 DAG size of output: 35 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-25 10:52:34,590 WARN L293 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 71 DAG size of output: 35 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-25 10:52:42,767 WARN L293 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 67 DAG size of output: 35 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-25 10:52:48,160 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-25 10:52:48,182 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:52:48,183 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:52:48,183 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:52:48,183 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:52:48,183 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:52:48,183 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:52:48,183 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:52:48,183 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:52:48,184 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:52:48,184 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:52:48,184 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:52:48,184 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:52:48,184 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:52:48,184 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:52:48,184 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:52:48,185 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:52:48,185 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:52:48,185 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:52:48,185 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:52:48,185 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:52:48,185 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:52:48,186 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:52:48,186 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:52:48,186 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:52:48,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 10:52:48 BoogieIcfgContainer [2024-09-25 10:52:48,186 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-25 10:52:48,187 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-25 10:52:48,187 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-25 10:52:48,187 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-25 10:52:48,187 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:52:10" (3/4) ... [2024-09-25 10:52:48,189 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-25 10:52:48,236 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-25 10:52:48,236 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-25 10:52:48,237 INFO L158 Benchmark]: Toolchain (without parser) took 38202.64ms. Allocated memory was 60.8MB in the beginning and 159.4MB in the end (delta: 98.6MB). Free memory was 40.3MB in the beginning and 92.5MB in the end (delta: -52.2MB). Peak memory consumption was 47.4MB. Max. memory is 16.1GB. [2024-09-25 10:52:48,238 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 44.0MB. Free memory was 27.4MB in the beginning and 27.4MB in the end (delta: 78.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-25 10:52:48,238 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.72ms. Allocated memory is still 60.8MB. Free memory was 40.1MB in the beginning and 28.4MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-25 10:52:48,238 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.13ms. Allocated memory is still 60.8MB. Free memory was 28.4MB in the beginning and 27.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-25 10:52:48,238 INFO L158 Benchmark]: Boogie Preprocessor took 36.08ms. Allocated memory is still 60.8MB. Free memory was 27.3MB in the beginning and 25.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-25 10:52:48,239 INFO L158 Benchmark]: RCFGBuilder took 383.13ms. Allocated memory was 60.8MB in the beginning and 90.2MB in the end (delta: 29.4MB). Free memory was 25.6MB in the beginning and 57.6MB in the end (delta: -32.0MB). Peak memory consumption was 2.7MB. Max. memory is 16.1GB. [2024-09-25 10:52:48,239 INFO L158 Benchmark]: TraceAbstraction took 37448.78ms. Allocated memory was 90.2MB in the beginning and 159.4MB in the end (delta: 69.2MB). Free memory was 57.1MB in the beginning and 94.6MB in the end (delta: -37.4MB). Peak memory consumption was 80.7MB. Max. memory is 16.1GB. [2024-09-25 10:52:48,239 INFO L158 Benchmark]: Witness Printer took 49.58ms. Allocated memory is still 159.4MB. Free memory was 94.6MB in the beginning and 92.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-25 10:52:48,240 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 44.0MB. Free memory was 27.4MB in the beginning and 27.4MB in the end (delta: 78.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 253.72ms. Allocated memory is still 60.8MB. Free memory was 40.1MB in the beginning and 28.4MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.13ms. Allocated memory is still 60.8MB. Free memory was 28.4MB in the beginning and 27.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.08ms. Allocated memory is still 60.8MB. Free memory was 27.3MB in the beginning and 25.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 383.13ms. Allocated memory was 60.8MB in the beginning and 90.2MB in the end (delta: 29.4MB). Free memory was 25.6MB in the beginning and 57.6MB in the end (delta: -32.0MB). Peak memory consumption was 2.7MB. Max. memory is 16.1GB. * TraceAbstraction took 37448.78ms. Allocated memory was 90.2MB in the beginning and 159.4MB in the end (delta: 69.2MB). Free memory was 57.1MB in the beginning and 94.6MB in the end (delta: -37.4MB). Peak memory consumption was 80.7MB. Max. memory is 16.1GB. * Witness Printer took 49.58ms. Allocated memory is still 159.4MB. Free memory was 94.6MB in the beginning and 92.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid * 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: 13]: 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 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.3s, OverallIterations: 11, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 122 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 96 mSDsluCounter, 1681 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1310 mSDsCounter, 119 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1040 IncrementalHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 119 mSolverCounterUnsat, 371 mSDtfsCounter, 1040 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 828 GetRequests, 736 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=8, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 54 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 1016 NumberOfCodeBlocks, 1016 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 909 ConstructedInterpolants, 0 QuantifiedInterpolants, 2695 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1156 ConjunctsInSsa, 152 ConjunctsInUnsatCore, 17 InterpolantComputations, 8 PerfectInterpolantSequences, 1091/1171 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 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((b == (((__int128) q * x) + ((__int128) y * s))) && (1 <= x)) && (a == (((__int128) y * r) + ((__int128) p * x)))) && (1 <= y)) && (((__int128) p * s) == (((__int128) q * r) + 1))) - ProcedureContractResult [Line: 7]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (cond != 0) - ProcedureContractResult [Line: 10]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= cond) Ensures: (1 <= cond) RESULT: Ultimate proved your program to be correct! [2024-09-25 10:52:48,267 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