./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.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 2205701c87619eed0a8a76ebf684289d4e97e42556aa5e531d0e97f394ad4619 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 16:22:10,591 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:22:10,663 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:22:10,668 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:22:10,668 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:22:10,692 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:22:10,693 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:22:10,693 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:22:10,693 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:22:10,694 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:22:10,694 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:22:10,695 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:22:10,695 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:22:10,696 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:22:10,697 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:22:10,698 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:22:10,698 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:22:10,698 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:22:10,698 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:22:10,699 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:22:10,699 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:22:10,702 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:22:10,703 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:22:10,703 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:22:10,703 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:22:10,703 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:22:10,703 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:22:10,704 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:22:10,704 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:22:10,704 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:22:10,704 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:22:10,704 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:22:10,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:22:10,705 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:22:10,705 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:22:10,705 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:22:10,705 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:22:10,706 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:22:10,706 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:22:10,706 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:22:10,706 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:22:10,707 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:22:10,708 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2205701c87619eed0a8a76ebf684289d4e97e42556aa5e531d0e97f394ad4619 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:22:10,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:22:11,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:22:11,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:22:11,025 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:22:11,026 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:22:11,027 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c [2024-09-18 16:22:12,417 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:22:12,610 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:22:12,612 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c [2024-09-18 16:22:12,622 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/71a190b95/3567d902431c406ca279b07f39541332/FLAG7e67a4057 [2024-09-18 16:22:12,991 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/71a190b95/3567d902431c406ca279b07f39541332 [2024-09-18 16:22:12,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:22:12,994 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:22:12,996 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:22:12,996 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:22:13,003 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:22:13,005 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:22:12" (1/1) ... [2024-09-18 16:22:13,006 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54990ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13, skipping insertion in model container [2024-09-18 16:22:13,006 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:22:12" (1/1) ... [2024-09-18 16:22:13,026 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:22:13,165 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/hard-u_valuebound1.c[537,550] [2024-09-18 16:22:13,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:22:13,188 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:22:13,199 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/hard-u_valuebound1.c[537,550] [2024-09-18 16:22:13,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:22:13,232 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:22:13,233 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13 WrapperNode [2024-09-18 16:22:13,233 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:22:13,235 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:22:13,235 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:22:13,235 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:22:13,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13" (1/1) ... [2024-09-18 16:22:13,247 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13" (1/1) ... [2024-09-18 16:22:13,253 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:22:13,255 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:22:13,255 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:22:13,256 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:22:13,256 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:22:13,265 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13" (1/1) ... [2024-09-18 16:22:13,266 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13" (1/1) ... [2024-09-18 16:22:13,271 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13" (1/1) ... [2024-09-18 16:22:13,286 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]. [2024-09-18 16:22:13,286 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13" (1/1) ... [2024-09-18 16:22:13,286 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13" (1/1) ... [2024-09-18 16:22:13,289 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13" (1/1) ... [2024-09-18 16:22:13,292 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13" (1/1) ... [2024-09-18 16:22:13,293 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13" (1/1) ... [2024-09-18 16:22:13,293 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13" (1/1) ... [2024-09-18 16:22:13,296 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:22:13,298 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:22:13,299 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:22:13,299 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:22:13,300 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13" (1/1) ... [2024-09-18 16:22:13,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:22:13,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:13,333 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) [2024-09-18 16:22:13,335 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 [2024-09-18 16:22:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:22:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 16:22:13,382 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 16:22:13,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:22:13,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:22:13,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:22:13,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:22:13,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:22:13,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:22:13,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:22:13,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:22:13,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:22:13,444 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:22:13,446 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:22:13,704 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-18 16:22:13,705 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:22:13,731 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:22:13,732 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-18 16:22:13,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:22:13 BoogieIcfgContainer [2024-09-18 16:22:13,733 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:22:13,736 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:22:13,736 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:22:13,739 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:22:13,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:22:12" (1/3) ... [2024-09-18 16:22:13,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ad53e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:22:13, skipping insertion in model container [2024-09-18 16:22:13,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:22:13" (2/3) ... [2024-09-18 16:22:13,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ad53e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:22:13, skipping insertion in model container [2024-09-18 16:22:13,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:22:13" (3/3) ... [2024-09-18 16:22:13,742 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound1.c [2024-09-18 16:22:13,760 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:22:13,760 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:22:13,825 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:22:13,832 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;@287500aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:22:13,832 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:22:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-18 16:22:13,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 16:22:13,844 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:13,844 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:22:13,846 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:13,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash 367441184, now seen corresponding path program 1 times [2024-09-18 16:22:13,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:13,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469488834] [2024-09-18 16:22:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:13,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:22:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:22:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:22:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:22:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:22:14,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:14,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469488834] [2024-09-18 16:22:14,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469488834] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:22:14,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:22:14,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 16:22:14,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552507856] [2024-09-18 16:22:14,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:22:14,052 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 16:22:14,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:14,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 16:22:14,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:22:14,070 INFO L87 Difference]: Start difference. First operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:22:14,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:14,095 INFO L93 Difference]: Finished difference Result 66 states and 107 transitions. [2024-09-18 16:22:14,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 16:22:14,097 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-18 16:22:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:14,102 INFO L225 Difference]: With dead ends: 66 [2024-09-18 16:22:14,102 INFO L226 Difference]: Without dead ends: 32 [2024-09-18 16:22:14,105 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:22:14,108 INFO L434 NwaCegarLoop]: 44 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, 44 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 [2024-09-18 16:22:14,109 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:22:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-18 16:22:14,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-18 16:22:14,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 16:22:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-09-18 16:22:14,142 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 27 [2024-09-18 16:22:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:14,143 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-09-18 16:22:14,143 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:22:14,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-09-18 16:22:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 16:22:14,145 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:14,145 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:22:14,145 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:22:14,146 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:14,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:14,146 INFO L85 PathProgramCache]: Analyzing trace with hash -781266146, now seen corresponding path program 1 times [2024-09-18 16:22:14,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:14,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975462973] [2024-09-18 16:22:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:14,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:22:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:22:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:22:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:22:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:22:14,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:14,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975462973] [2024-09-18 16:22:14,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975462973] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:22:14,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:22:14,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:22:14,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344674948] [2024-09-18 16:22:14,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:22:14,417 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:22:14,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:14,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:22:14,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:22:14,422 INFO L87 Difference]: Start difference. First operand 32 states and 42 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-18 16:22:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:14,505 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-09-18 16:22:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:22:14,506 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-18 16:22:14,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:14,507 INFO L225 Difference]: With dead ends: 45 [2024-09-18 16:22:14,508 INFO L226 Difference]: Without dead ends: 43 [2024-09-18 16:22:14,509 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:22:14,510 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:14,512 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 134 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:22:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-18 16:22:14,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-09-18 16:22:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 16:22:14,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-18 16:22:14,531 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 27 [2024-09-18 16:22:14,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:14,532 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-18 16:22:14,532 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-18 16:22:14,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:14,533 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-18 16:22:14,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 16:22:14,536 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:14,536 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:22:14,537 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 16:22:14,538 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:14,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:14,540 INFO L85 PathProgramCache]: Analyzing trace with hash 992341126, now seen corresponding path program 1 times [2024-09-18 16:22:14,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:14,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27977982] [2024-09-18 16:22:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:14,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:22:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:22:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:22:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:22:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:22:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:22:14,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:14,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27977982] [2024-09-18 16:22:14,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27977982] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:22:14,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:22:14,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:22:14,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181000589] [2024-09-18 16:22:14,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:22:14,945 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:22:14,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:14,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:22:14,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:22:14,947 INFO L87 Difference]: Start difference. First operand 36 states and 45 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 16:22:15,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:15,070 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-09-18 16:22:15,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:22:15,071 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-18 16:22:15,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:15,072 INFO L225 Difference]: With dead ends: 49 [2024-09-18 16:22:15,072 INFO L226 Difference]: Without dead ends: 47 [2024-09-18 16:22:15,073 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:22:15,074 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:15,074 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:22:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-18 16:22:15,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-09-18 16:22:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 16:22:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-18 16:22:15,083 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 32 [2024-09-18 16:22:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:15,084 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-18 16:22:15,084 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 16:22:15,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-18 16:22:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-18 16:22:15,086 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:15,086 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-09-18 16:22:15,086 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 16:22:15,086 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:15,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:15,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1500804130, now seen corresponding path program 1 times [2024-09-18 16:22:15,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:15,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799270728] [2024-09-18 16:22:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:15,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:22:15,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114318434] [2024-09-18 16:22:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:15,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:15,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:15,126 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) [2024-09-18 16:22:15,128 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:22:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:15,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-18 16:22:15,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:22:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 16:22:15,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:22:15,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:15,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799270728] [2024-09-18 16:22:15,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:22:15,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114318434] [2024-09-18 16:22:15,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114318434] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:22:15,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:22:15,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-18 16:22:15,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845815842] [2024-09-18 16:22:15,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:22:15,366 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 16:22:15,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 16:22:15,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-18 16:22:15,371 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-18 16:22:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:15,574 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2024-09-18 16:22:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 16:22:15,575 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2024-09-18 16:22:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:15,576 INFO L225 Difference]: With dead ends: 66 [2024-09-18 16:22:15,578 INFO L226 Difference]: Without dead ends: 53 [2024-09-18 16:22:15,578 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-18 16:22:15,580 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:15,581 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 183 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 16:22:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-18 16:22:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-18 16:22:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-18 16:22:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-09-18 16:22:15,604 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 37 [2024-09-18 16:22:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:15,605 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-09-18 16:22:15,605 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-18 16:22:15,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-09-18 16:22:15,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-18 16:22:15,607 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:15,608 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2024-09-18 16:22:15,626 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 16:22:15,808 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:15,809 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:15,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1357220557, now seen corresponding path program 1 times [2024-09-18 16:22:15,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:15,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836064250] [2024-09-18 16:22:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:15,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:22:15,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169558765] [2024-09-18 16:22:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:15,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:15,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:15,844 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) [2024-09-18 16:22:15,846 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:22:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:15,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-18 16:22:15,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:22:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:22:16,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:22:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-18 16:22:17,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:17,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836064250] [2024-09-18 16:22:17,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:22:17,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169558765] [2024-09-18 16:22:17,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169558765] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:22:17,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:22:17,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2024-09-18 16:22:17,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908106867] [2024-09-18 16:22:17,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:22:17,312 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 16:22:17,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:17,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 16:22:17,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-18 16:22:17,314 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-18 16:22:17,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:17,909 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-09-18 16:22:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-18 16:22:17,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 44 [2024-09-18 16:22:17,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:17,913 INFO L225 Difference]: With dead ends: 71 [2024-09-18 16:22:17,913 INFO L226 Difference]: Without dead ends: 63 [2024-09-18 16:22:17,914 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-09-18 16:22:17,915 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:17,916 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 188 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 16:22:17,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-18 16:22:17,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-18 16:22:17,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-18 16:22:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2024-09-18 16:22:17,932 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 44 [2024-09-18 16:22:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:17,932 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2024-09-18 16:22:17,932 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-18 16:22:17,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2024-09-18 16:22:17,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-18 16:22:17,934 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:17,934 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 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] [2024-09-18 16:22:17,950 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 16:22:18,138 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:18,139 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:18,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1728018148, now seen corresponding path program 1 times [2024-09-18 16:22:18,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:18,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934345922] [2024-09-18 16:22:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:18,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:22:18,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479745429] [2024-09-18 16:22:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:18,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:18,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:18,169 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) [2024-09-18 16:22:18,173 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:22:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:18,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-18 16:22:18,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:22:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-18 16:22:18,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:22:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-18 16:22:19,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:22:19,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934345922] [2024-09-18 16:22:19,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:22:19,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479745429] [2024-09-18 16:22:19,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479745429] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:22:19,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:22:19,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2024-09-18 16:22:19,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262480649] [2024-09-18 16:22:19,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:22:19,308 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 16:22:19,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:22:19,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 16:22:19,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-09-18 16:22:19,309 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-18 16:22:20,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:22:20,757 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2024-09-18 16:22:20,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 16:22:20,757 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) Word has length 54 [2024-09-18 16:22:20,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:22:20,759 INFO L225 Difference]: With dead ends: 90 [2024-09-18 16:22:20,759 INFO L226 Difference]: Without dead ends: 82 [2024-09-18 16:22:20,759 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-09-18 16:22:20,760 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:22:20,760 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 240 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-18 16:22:20,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-18 16:22:20,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-09-18 16:22:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 47 states have (on average 1.127659574468085) internal successors, (53), 51 states have internal predecessors, (53), 24 states have call successors, (24), 11 states have call predecessors, (24), 10 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-18 16:22:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2024-09-18 16:22:20,783 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 54 [2024-09-18 16:22:20,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:22:20,783 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2024-09-18 16:22:20,784 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-18 16:22:20,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:20,784 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2024-09-18 16:22:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-18 16:22:20,785 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:22:20,787 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 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] [2024-09-18 16:22:20,794 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 16:22:20,987 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-18 16:22:20,988 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:22:20,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:22:20,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1452252536, now seen corresponding path program 1 times [2024-09-18 16:22:20,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:22:20,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194245524] [2024-09-18 16:22:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:20,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:22:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:22:21,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626098868] [2024-09-18 16:22:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:22:21,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:22:21,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:22:21,033 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) [2024-09-18 16:22:21,034 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:22:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:22:21,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-18 16:22:21,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:22:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 54 proven. 23 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-18 16:22:22,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:22:54,844 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-18 16:23:11,695 WARN L293 SmtUtils]: Spent 16.01s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:24:15,271 WARN L293 SmtUtils]: Spent 28.00s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-18 16:24:27,431 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:24:43,453 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:25:15,490 WARN L293 SmtUtils]: Spent 21.17s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:25:28,518 WARN L293 SmtUtils]: Spent 13.03s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:25:48,597 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:25:52,603 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse5 (mod (* c_main_~p~0 c_main_~B~0) 4294967296))) (let ((.cse0 (mod c_main_~A~0 4294967296)) (.cse1 (* c_main_~q~0 c_main_~B~0)) (.cse4 (mod c_main_~p~0 4294967296)) (.cse3 (div .cse5 2)) (.cse2 (mod c_main_~r~0 4294967296))) (or (not (= .cse0 (mod (+ c_main_~r~0 .cse1) 4294967296))) (< .cse2 .cse3) (= .cse4 1) (= .cse0 (mod (+ c_main_~r~0 .cse1 (* c_main_~B~0 (div .cse4 2)) (* .cse3 4294967295)) 4294967296)) (< .cse5 (+ 1 .cse2))))) is different from true [2024-09-18 16:26:08,643 WARN L293 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:26:29,184 WARN L293 SmtUtils]: Spent 14.30s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-18 16:26:45,207 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)